Honda CBX Engine Teardown...SO MUCH DAMAGE!! EP3
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- In this video I do a full teardown of the Honda CBX engine and discover so much damage! There were just so many odd flaws and issues that I can not point to a single one as the reason the engine was seized up. I am happy I did a disassembly to find and rectify all these issues as the bike will be brought back to life with great confidence that it was done correctly!
For now I have many parts in hand for the engine in regards to seals, gaskets, hardware but now must wait on a new sleeve before the top end work can begin. I will do my best to keep updated videos on the project but I would expect a gap between now and the next one so please be patient.
Previous episode:
• Honda CBX Restoration ...
Great channel for step by step CBX content: / digitalpizza1
Parts and information sources:
Tims CBX: www.timscbx.com/
Sixcenter: sixcenter.nl
The Motorcycle Project: motorcycleproj...
Partzilla: www.partzilla....
CMSNL: cmsnl.com
David Silver Spares: www.davidsilve...
Cyclehouse Performance who is handling my machine work: www.cyclehouse...
LA Sleeve: www.lasleeve.com/
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Hey everyone I feel compelled to comment here and request you please watch the entire video and/or previous videos before commenting/emailing on my methods here. I do in fact have an FSM but the process goes out the window when the engine is seized. I go over this in the previous episode but regardless I will make this bike better than new when done and it will be by the book so don't worry. Great care will be taken.
No problem and you did clearly explain that the the engine was ceased and so you couldn't follow the usual tear down route 👍
He took apart a CBX and put the pieces away like it was just another day. It's like watching someone at a museum restoring a painting with Qtips. It would be one thing if it were some old backyard p.o.s. but it's a CBX... I'm just blown away. Amazing episode.
Thank ya!
It's great to see a CB/x being rescued. I loved my '82, but life intervened and it had to find a new home. It's hard to believe it's been 40 years since it was made, and 30 since I sold it.
I own a 79 that I'm converting to all pro link cbx suspension and brakes but if I were to own a later CBx it would be the 82 love the blue and white! (My donor bike was a roller 81)
Jip, same situation here. I fitted Falikon Knife Edge conrods, 1163cc HC pistons, Andrews cams, gasflow head and valves, Ohlins U/down front, Brembo brakes, Matchmatec swingarm, mono rear Ohlin & 180 rear tyre. Lots of frame mods & stabilizers. This 80CBX was powerful , handle like a super bike and run & beat R1250 BMW with ease.
@@Stickleback Yep. Actually, recently married and money was tight. The CB/x proceeds went to buy her a ring and pay some bills. Wound up losing both the bike and the wife, but selling the CB/X was the right thing to do at the time. No regrets. She kept they ring, and now it's on the finger of my daughter-in-law. So, in a way, that CB/x is still part of my life. :)
I had an 81, really bitchin bike, miss it ,wish I never had to sell it ,would love to have another,amazing what they go for now
Had a 1980 bought new. Sold 5 years ago to a museum in progress. Last project for me was the valves. I was lent the use of the local Honda dealers complete collection of shims. Amazing engine
Saw CBX and knew I had to watch this one, the CBX is and always will be one of my favorite Honda's alongside the MC22 250RR and the VFR750R
Eventually I need to get my hands on a VF model. Those are so cool!
Honda engines around this time were complete shit. That's why you never saw drag race tuners ever using them.
I had the total misfortune to buy a mint 84 VF750, the sports model, don't one buy one unless you are a complete masochist and want your friends to remorselessly take the piss out of you and c'mon no one wants that do they..
@@nigelmitchell351 so you specifically bought an early 750 with a known cam oiling problem and use that as why all Honda engines are no good? Seems fair
@@BrickHouseBuilds No the early low stressed low power twins and fours were very good I had some.
But if you understood anything about design, engineering and manufacture you wouldn't make a crass statement like," an oiling problem". The whole vee four family of engines until the advent of the VFR 750 were flawed by their design, engineering and manufacture not a simple oiling problem.
The way the cylinder heads were made was just wrong. My VF had its first cam and rocker failure at 869 miles.
IE if you you don't see semi circular rubbers in the sides of the head don't even consider it for any kind of project. Actually, maybe you should then you'll understand exactly what I'm banging on about and you might learn something.
As I said why do you think all the top US drag bike tuners used Suzuki's or Kawasaki's ?
I did forgive Honda eventually and bought a fireblade, great bike zero problems.
Honda learnt their lessons but their treatment of VF customers was appalling.
Congrats on the engine stand functionality 👏🏼
Bummer about the previous bodgy work☹️
No doubts that this is gonna be sensational when done though👌🏼
Newcomer to your channel & really enjoying it.
Thanks, & hope you have a great, happy & safe festive season🍻🇦🇺
I appreciate all the interaction Murray! You have definitely been knocking down some videos lol! Happy holidays to you as well!
Yeah, I’ve unfortunately been mostly couch bound as I recover from another back injury😕 but when you’re given lemons 🍋 🍋…..
make lemonade (just like your CBX)🥤👍🏼😀
@@murraydeeth7834 thats tough! Best of luck on that recovery
That big old chunk of aluminium was probably off the broken/stripped cam chain tensioner (it looked a bit mangled underneath) and would have been sitting in the sump prior to inverting the engine.
I didn't see any suspicious areas on any parts which is why I suspect it has a different head on it
The holes of the camshaft are deliberately made wide so that they can be set exactly on time. I've seen it before, but then they modified the camshaft sprocket holes. Different engine by the way
Right at the point of teardown seeing all that was wrong I was questioning absolutely everything at that point. What do you mean different engine?
@@BrickHouseBuilds
I've seen it done on a Suzuki DR Big 800. The oval hole allows the camshaft to be turned slightly so that it can be set exactly on time. I have pictures of it, but I can't post them here.
nice bikes Worth the time (AND MONEY)
Yes hopefully I can make a return on this one with the hours it will command I invest into it. We will see!
When are you going to post the video of the completed rebuild?
Well I mentioned at the end that it would likely be a couple months from the time of posting. Today I'll have the cylinder back and will hopefully start on the cases within a couple weeks. I have a lot going on currently and this bike is not the top top priority at this moment
@@BrickHouseBuilds Thanks for the update. I didn't know how long ago your tear down video was posted. I thought you might have been done with it. No problem. Good luck! BTW, I bought a '79 CBX new back in 1980. They are neat bikes!
Are you interested in doing a bigbore 1350 to a Vmax?
That sounds like fun! That is actually not a job I would take on and currently am not taking on any other work already.
@@BrickHouseBuilds I'm thinking maybe a year or so in the future. This bike has 44k on the clock and alot of carb work. It's been a project in my head for about a decade.
@@BrickHouseBuilds maybe even a blower and single Holly on top.
I guessing thátt Alooooooomin-Numb bit is wheré you sáy I suré
Good Video except for the music.
Noted, cant please all musical tastes so hopefully you come back to continue the series on the bike
@@BrickHouseBuilds Better with no music just the ambient noise.
@@johnpartridge7623 with a time-lapse video file there is no sound. With no noise people leave the video. I can actually see that info in my analytics. People want music I promise
I just love the way you work. Meticulous, careful, clean, step by step. Great stuff!
Much appreciated Freek!
@@BrickHouseBuilds I used to work on bicycles. Racing bicycles ... Very different, but that was my approach too ...
I bought a new 1982 CBX as a left over in 1984. At 4000 miles on a trip the engine developed a lower end knock at 7000 rpm. I was concerned but seeing that it's used mainly for touring I usually didn't run it at that rpm very much anyway. As I put miles on it the knock started making its' presence felt at lower and lower rpm. I had ridden it out to California and back and the noise was there at 4000 rpm and above. It had about 24K on it so that winter I pulled it into the motorcycle dealership I was working at and took the motor off and replaced everything that might cause a noise. A thorough inspection turned up nothing obvious, so I ended up replacing the cam and primary chains along with the guides, new main and rod bearings along with transmission bearings. I was paying the employee price of 10% over cost so I didn't scrimp. The only thing that I found that might have caused the noise was a machined nut that joins the 2 halves of the jackshaft that the alternator runs on was not tight. Anyway, I reassembled it and the knock was gone and it ran smoother than it ever had. I didn't put any more miles on it because I sold it that spring and got a 1987 Hurricane 1000. I wouldn't worry about those cam mounting holes, that joiner piece is what mainly holds it into position.
Great video thank you for making it. This type of video adds to the pool of knowledge on TH-cam that unskilled people like me can access.
Thank you. This particular series won't be in how to style but rather just sharing my journey for the restoration. Digital Pizza has already put all of those great videos out there if you need more detail.
Interesting video, I had a CBX1000 back in the day, never had any need to strip the engine, I did take the valve cover off to chrome it, that was about it.
Just had the biggest grin 😁 riding that bike, so much torque and the power was so smooth right the way through the rev range, almost 60mph in 1st gear!!
It would pull away in 5th gear from like crawling speed, incredible engine and that straight 6 howl through the marshal 6 into 1 exhaust was very addictive.
EDIT I had a suzuki 650 katana before this, went into my local bike shop for a rev counter cable, saw this CBX did a massive double take, assumed it was out of my price range and knew the shop was expensive anyway but just asked the price out of curiosity.
Just £2,500 it was on a 'w' plate so an '81 I think, this was in the early 1990s so it would have been over 10 years old asked how much trade in he would give for my Katana and it was a good price to be fair, more than what I paid for it!
So a deal was struck.
Instead of buying my rev counter cable I put the money for that on it as a deposit for the CBX, happy days.😁👍
The best exhaust note i ever heard was a CBX 6 into 1. And that was back in 1984
Cool story!!
Had a 79, was idling one day and I guess had some vapor build up and it thru a rod out side of case. Had to have the case welded, was good as new after rebuild.. Best bike I ever owned.
screwdriver tip broke off trying to find top dead center. ask me how i know. someone need to sell there tool box. they have no business working on engines.
Watch the MIKE NIXON video,s he was service technician for honda..
Bloody heli coil. Never like it.
My heart sinks when I see a beautiful engine that's been butchered by what we call 'Rockapes' over here. Still, you're on your way to making things right.
I took a peek at your warehouse video and yeh, I have a similar situation myself. Someone asked me today how many bikes I have not including customers... I couldn't remember off the top of my head 🤪
I have the shop at home thing and several units for storage and other stuff.
Yea no clue how many bikes I have lol
I'm going to go out on a limb and suggest that the random piece of aluminium in the gears originated from the broken cooling fins! Possible?
Maybe not on teardown but on reassembly even. If they were such cowboys on the teardown then it was probably still a mess when it was reassembled.
Fair guess but the piece in the trans was much larger than a cooling fin section. I still suspect it has a different head and the broken piece was from the original.
Hey just discovered your channel - I had a question from a last thanks giving would have like to ask then - meantime you are featured on my channel now -
Hello and welcome to the channel! Hopefully you like it!
🏋️ HONDA 1047 cc THE best 😍😍😍
Someone probably used a flat screwdriver to get a indication of the TDC on cylinder 1 and then broke of the tip!? 🙄
To people who think it’s a good ide.. ONLY USE a Philips screwdriver that will not break off as easy!.
We can only speculate at this point what happened but it was definitely a surprise to see it in there!
I went to the factory school for that engine. Couple of things do not bolt the valve cover on with cam drive in place it will break the gear and damage the cam. Early engines had a manual fuel shutoff, as the side stand would bend and the fuel valve left open, gasoline would hydraulic lock #1 cylinder but the engine would fire and bend #1 rod slightly. About the second or third time one hits redline that rod will break and destroy the cases. I have had to replace cases on a 6 for that reason
Very cool Dan. Many have pointed out the tach drive yes I did forget to remove it. No bent rods on this one
..... repaired the cam tensioner bolt hole with HELICOIL? I bet whoever did that either left the drive tang on the coil, or dropped it into the crankcase when snapping it....
Yeah they were probably doing the best they can but definitely needs to be done correctly
I see a big chunk broken out of the top crankcase where the #3 rod runs past. Maybe the chunk you found. I'd say the primary guides, chain, and tensioner might be in need of serious help too, and the engine had other serious damage in its past life. I believe the trans gears rotate the other way and would tend to expel that chunk out the bottom, BTW. My guess is the lock up was from the foreign bits in the cylinders.
BTW - please don't "cafe" a CBX (I cringe at the thought)..... at least don't make any mods to original parts that can't be undone. I like to point out that Honda isn't making anymore CBX parts, so what is out there now is pretty much all we are ever going to get. I have to admit I am building a project CBX as a resto - mod now. Besides the resto-mod project, I have 2 mint rideable CBX's (one is a fully restored 79 model) and a room full of NOS and used spares. The resto-mod is being built from an engine and a spare frame I had on hand, bought separately respectively from Louis Mintrone and the local classifieds many years ago. And I'm not modifying either from OEM. Just repairs, a refresh, and re-finish on the engine and sandblast / new paint on the frame. No cutting the frame, no single shock or single sided swing arm. Not cutting up an original seat pan, or drilling holes in the OEM airbox. The rest are non - CBX bolt-ons (late model sport bike front forks, wheels, brakes, etc. adapted to fit the CBX frame and not the other way around) and resuscitated / restored junked or reproduction CBX parts to keep the original lines / looks. Like the 79 fuel tank I'm using from an old drag bike that had flipped over on its back. It was squashed, twisted, and holed and would have been unusable if I didn't commit a hundred or so hours repairing it. Also, my rule now that CBX parts are getting ultra - rare - don't throw any CBX parts away, even if you think they are junk.
This is a restoration project. Already have all tensioner components being replaced/rebuilt. I will look again at the case and will be surprised if I missed that but we will see.. it was strange that the engine was frozen in both directions as shown in the previous video. A combination of things perhaps. Interesting that you say you wish for someone to not cafe a bike but are doing a restomod though.
@@BrickHouseBuilds I just think It is a huge mistake to mod a rare and desirable classic bike in a way that can't be easily undone. In the 80's / early 90's I had my first CBX (a wrecked low mileage early serial number 78/ 79) modded all to hell. Every year or two i would tear it apart and completely re-build it using the best / latest parts and tech I could find, swap and add. All sorts of aftermarket and late model parts on it. Enough mods to bring the weight down to just over 450 lbs wet. Power, handling and brakes to keep up with a stock 92 GSXR1100 up to about 125 mph. Then one late autumn day in 92 I got to ride a friend's completely stock mint 79 and instantly regretted not having saved all my original parts. I did however have the foresight to have never cut up or otherwise modify the frame and OEM parts. I set about the long and expensive road to re-acquire as many of my old parts I could find and began restoring my bike back to OEM - as new condition. And that was before the prices of CBX's started to climb. I now have a few rare 80's sport bikes I'm modding in the same way for some friends - bikes that are rapidly increasing in value in stock trim (Katanas and KZ's). I am following the same rules - don't do anything that can't be undone, and keep all the original parts....
I'll try and remember the cleaner that dissolves the old potting. I had tried so many chemicals before I found one that worked (and it worked very well, without serious damage to the circuit boards or wires)....but that was something like 10 years ago and I don't remember. I do think it was the urethane reducer (the potting is a urethane based product). I know whatever it was, 99.99% chance I still have some on my shelves.....I also have some scrap / blown sim. Kawasaki electronics that use the same compound, so I'll try some experiments with those and see...I'll post it when I do.
4 dang cams. That BAR of carbs is magnificent and anxiety inducing.
24 valves, 6 carbs, 4 cams, 3 chains, 2 tensioners, and a partridge in a pear tree! But yes 4 dang cams lol
Ah, a little Xmas spin on the whole crazy thing!!😆🎄🎅🏽
That engine stand is utterly brilliant! Please, please, don't hipster millennial "cafe racer" it with a hideous paint job, a brown quilted seat cover, micro led turn signals, etc.
Thank ya. This is a restoration bike. Be sure to check out the previous 2 episodes to be filled in on the project
I worked in a motorcycle shop back in the late 1960s early 1970s and I wish I had a nickle for every time I had to correct a mistake done by a shade tree mechanic so that I could have retired by the time I was 30 ! Then I switched over to cars and trucks and my work really got interesting! But knowledge coupled with patience and a desire to always do a perfect job makes a good mechanic and you fill that title very well! Remember; a mechanic that knows his craft never has to cheat!
Well I appreciate it! While I'm no CBX expert I do have the ability and desire to learn as everything I do I do to the best of my abilities so I know I'll do right by this bike. Thank you!
@@BrickHouseBuilds You are welcome, keep up the good work!
I've still got some engine parts from my 79 CBX1000. Know anyone that want's to buy them?
Im sure anyone would jump on it if you posted them for sale
I assume someone was trying to find top dead center with the screw driver method on cylinder #1 and they broke the tip of their screwdriver off in the process. Smh
Very likely
Looks like the same person tried to repair my 78 F2 750, it just confirmed my thought that there are some people that should not touch tools, example - the swingarm bushes the ends of the swingarm where the bushes are pressed into, both sides were cut off about 8 - 10mm, all three items Bushes, Swingarm and the centre spacer tube, What were they thinking ??, one of many such mindless acts of butchery. All he said is shook his head.
Good God yea some people should never be allowed to own tools lol.
Wow I remember buying my second bike a CBX 6 into 1 in Scotland in 1985 what an awesome engine sound!!
Lol You are doing a great job mate👍 I only got to take off the top end on her and that was already a big job! I did have a real nice 6 into 1 pipe on her and raced around! 🤩💚🏍
1983, Daytona Beach... 1979 CBX.. came into shop... elongated cam slots with what looked like hardware store bolts sheared off from cam tensioner taking a rather large constitutional. When owner got it back from previous shop he went beach racing with it. Blew in under an hour. We had a "blast" repairing it. Even back then it cost him 3400 dollars. I came back to Missouri shortly after that. Dunno why.
I bet that screwdriver tip was when they separated the head. Snapped off during prying.
But who knows. Quite the problem you received!
More likely was looking for TDC. I don't think they could have left the tip in the bore from prying. Regardless it was bad
@@BrickHouseBuilds that is a pretty aggressive way to find top dead 🤣 I can only imagine how sick you are getting from seeing my comments! Can’t help myself. Your videos are built quite well.
@@ColdStartGarage oh not at all don't worry about that. I enjoy the interaction
Since you flipped the engine, that chunk of metal may have been laying down in the pan.
Definitely a possibility. Check out the cylinder head disassembly video as I feel the valves were my culprit for seizing by hand
I still own a 1979 CBX that I bought in 1983. It was lightly crashed and repaired in the late 80's buy me back to full glory and then some. Part of the repair involved a new cylinder head, a resleeve big bore kit now 1304cc, Falicon rods, yada yada yada, but reused the stock cams. When I reassembled the motor I "Degreed" the cams to Get the centerlines where i wanted them by elongating there holes and red lock tite. It's an absolute animal of power with formula one sound. Hope this all went well for you.
Háh it liké my ct110 enguné, only 9.09 times bigger untt 14 timés MÓŘÉ POWER-PHULL 😨😲😲 😁
I bought a basket case 1984 Honda cb700 Nighthawk s that the alternator chain had broken and I had to split the cases on it. It had so many pieces of the chain in the sump. I got it all cleaned and put a later model chain that is much tougher since Honda found out that they had so many failures and I’ve put around 10k on it since assm.
Can’t wait to see this project continue. Good job not rushing it into a “will it run” mode. Good thing you didn’t. There are not a lot of CBX’s out there. Love your channel.
I very much need to get back on it. Its high on my priority list for sure. This winter I WILL get the engine done and then turn my attention to the chassis.
Worth every penny and oz of sweat, what I’d give to find one in any condition, dang.
My first motorcycle engine overhaul was a CBX that had a rod punch through the block. That was a handful. That was in 1992. The engine was a beast. It weighs 232 pounds and I picked it up and set it on my shop table. That was 30+ years ago when I was a gym rat. I put another 35,000 miles on that engine, much of it on rallies with the CBX Club in California. Some years later I put a 1983 Honda 1100F front end, bikini fairing, and swing arm on it. Some ''expert'' was telling me that it couldn't be done, the swing arm bolts are different sizes, and all kinds of excuses. There were about 35 CBX's in the motel parking lot in Morro Bay on that rally. I let him tell everyone that I was full of it, 1100F parts don't fit. Then a friend said ''Hey, the bike behind you has the 1100F stuff, even the wheels.'' We shut him up in a hurry. The sound of 30+ CBX's blasting down the highway in staggered formation is a sound to behold. It's like being in a bomber formation. Oc course Mark had his black Turbo CBX and it would blast ahead at 130mph in seconds. Those were the days!
Ah, the CBX. That beast came out when I was a college freshman. There was a local Honda/ Suzuki dealer near where I lived & went to school. I was able to get the dealer to let me take one for a test ride as I was a very frequent customer for my '73 CB450 DOHC. It actually scared me as it was SO EASY to get it Very Fast and not so easy to confidently get it to slow down back to safe levels of speed & operation. Wow! Amazing piece of engineering & production. Then, I believe the next year Yamaha came out with the XS Eleven !! Even More incredible. Good Luck on this rebuild. It should be a very nice example when completed.
Thank ya Doug! These brakes are definitely on the small size haha! I'm excited to get it up and running
And THATS why I'm converting my 79 to prolink suspension for the brakes. dual piston calipers all the way around and front discs are vented. Plus better suspension! Win, WIN!
I had a CBX back in the 80's and it was a wonderful machine so its great to see this example go to a good home, just in time by the looks of it. Thanks for this video.
Thank ya Marc! I'll do it justice and give it a second life
It's either a screwdriver tip, or an ootheca of a metal cockroach, and I don't know what's worse: someone scraping a piston with a screwdriver until the tip breaks, or the existence of metal cockroaches.
What a fantastic video, thanks for posting.
🤘🤘
Great bike from the golden era of bikes. I’ll bet parts are hard to get.
Some parts yes they are hard to get or just very expensive. Most parts though are easy and reasonably priced
Eta teu lieur kang... Onerdil motorna loba pisan.... Mantafff lah pokona c akang... Berebetkeun....
My God, this has taken me back to when I was 24 in '86 when I broke the cam chain on my CBX, I pulled it apart and rebuilt it after 8 valves got bent. My genius method to replace the chain was to undo the crankshaft webs, remove the crankshaft and feed in the chain and reinstall, it worked. this was my first ever engine rebuild and I used old pillows and blocks of wood to support the engine. All went great, until I made a fatal mistake in reassembly and got a bit of grease in cylinder 6 cam oilway. This caused a seizure and wiped out that cam. Luckily, the head of the CBX Owners Club UK came to the rescue and supplied replacement cam caps and camshaft and advice for £16. Now the dilemma was that the cam seats were covered in melted camshaft metal, so being a Dental Technician at the time I rubber wheeled all of the metal off the seats which are really hard, i.e. the the last microns just faked off and the engine rebuilt and it is still on the road.What do they say about a little bit of knowledge. The only other bike engine's I have rebuilt are an XS 250 Yam and a Honda Cub Lmao
Many lessons learned there!
That is a beast of an engine 😬 Really nice to see you dive all the way into it and give it a second life 👍 Do you want to restore the bike to it's original look, or do you consider a custom / cafe racer style?
I feel much better about doing the full rebuild for sure. This is a restoration so it will be as close to showroom as I can get it.
@@BrickHouseBuilds Great, looking forward to see the progress 😊
There are some odd things about the CBX engine. The clutch system for the alternator is one. Another is the cam sprockets are threaded as opposed to the cam flanges. It makes timing the cams for performance cams a PITA. The cam chain system off the exhaust is odd ( with lots of tensioners) too though all the DOHC Honda's of that era had the same system.
Definitely some unique attributes but undeniably cool
You're a great wrench and many teachers could learn from you sir. I appreciate the absence of fake drama and bad language.
Well thats very kind thank you!
Bo not to thrash anybody but the end of the srcewdriver was broke off in the cylinder by trying to find TDC I know it wasn't you but someone be for you and the spark plug and the piece in the tranny o well fix and go on that's what we do
Anyway keep it between the mustard and mayo and rubber side down GBU later
Well, now that you know, the previous owner took you for a ride on this bike. Are you still going to hang out and have beers with him?
I hope we get to see a complete cost analysis of this rebuild when completed to get an understanding of what a total rebuild cost really is.
Excellent video as always. Much appreciated in showing real life dilemma.
Well I already do have beers with him each month at bike night. Its not his fault but rather the owner before him. I really won't be able to share costs until after I sell it but ill try to put together a breakdown at that point
This is what I meant by engine work. I like the way you approach the job. Nicely done. Good luck with the rebuild.
Noted
Yanına bir çırak al da bilgilerini ona aktar
Bilgilerini bir ikinci kisiyede oğret ki ölunce o devam ettirsin bu dunyada kimse kalıcı değil.o çırakta senden öğrendiğini diğer bir çirağa aktarır ve efsaneleşirsin yani.selamlarimı iletiyorum sayın bilgili insan.senin gibiler az yetişiyor.🇹🇷👋🥰🙋
That is what my videos are for. I share any and all info I have for others to learn from
Those camse do not appear to b reground....though.... cam bolst should b of 10.9 or 12.9 quality.....
Agreed. I have new OE bolts for the cams also when we get to that point
Years ago I re built a cb900. Damaged head and piston caused by the rev counter cable retaining screw. It was out and resting by a plug. I took plugs out to change, fitted new ones and happily pressed the starter button. Motor locked up in one second. Took a bit of fixing
Wow that is unlucky as can be there. Dang!
Sounds like you have a solid plan, props to you for taking this on and committing to doing it right!
It deserves to be brought back to its glory!
My mate had one of these in the ‘80’s, and we used to swap bikes regularly and so I used to ride his CBX often.
He had the misfortune to get a failed rev counter drive which resulted in a half moon shaped bit of aluminium blowing out of the cylinder head casting by the valve cover joint.
Another friend of ours chain drilled some holes in both mating pieces and stitched then together with wire and secured with Araldite. It was quite a neat and effective oil-tight repair.
However we had another club member friend (who had a CBX Prolink), who worked for Honda UK at Chiswick. He “sourced” a new cylinder head for my pal.
I went round his house and helped him lap 24 valves into the new cylinder head on his living room floor during the rebuild!
He had many good rides on the rebuilt bike and so did I. Although I never pulled wheelies on it like he did-a proper boy racer he was🤣
Brilliant bikes.
Always remember to remove the rev counter fitting on to of the cam cover, not only unscrew the cable. The rev counter drive is part of the cam cap and will snap a piece of aluminium which will end-up in the engine and you have to buy a new cam cap.
I painfully remember having to strip my CBX and rebore it after i was unable to remove plug no.3 which eventually snapped part way out.
It sat on the bench for 5 years with 5 plugs in and 1 open due to a snapped plug and you'll never believe me when i tell you there was a nail hole in the tin roof......
EXACTLY above no.3. It filled that cylinder with rain.
😬 that is not fun!
@@BrickHouseBuilds i only build CRF301s now, 2 valves... 1 plug. :)
My story on CBX's is very different. I'll try to make it short: I've had four 1981 CBX's #1 was a demo as I was a salesman at a Honda dealer. Put 24k miles on it. Then I bought one for myself. #2 at 75k miles on it got hit while parked (Lady was a pro as she had a primered fender that was dented before she hit my bike). Totaled. So #3 I bought with supposedly 12k miles on it. At 138k miles it still exists but I traded it for a paint job on a car and the guy has not touched it (and won't sell it). So #4 I got with (supposedly 30k miles on it). It has 104k on it today. #1 and #2 I had maintained per schedule. But with #2 I had someone adjust the valves and it burned a valve shortly after. Then I had someone fatten the carbs to accommodate the DG 6 into two exhaust. That resulted in one carb dumping fuel into the engine and running on 5. Replace carbs. Then it got T-boned. At this point I noticed the the valves never needed to be adjusted when checking them. So #3 got the valves looked at at 60k mile intervals (or if the clutch basked had rattled. Which it never did). Parked it at 138k miles having never taken the carbs off. Enter #4 which I have not touched the carbs or adjusted the valves. I did recently take the cam cover off to see if any of the valve buckets were tight. None were. So 330k miles on 81 CBX's . The exhaust system on #4 is from #2. The front forks are from #3. I've replaced chains, sprockets, chains, fork seals and alternator brushes. Never an air shock and no alternators, steering head bearings or ProLink bushings. Recovered the Corbin seat twice. I did have a turn signal bulb fail once but I wiggles it and the light came back on. It's a Honda.
Thats epic!
Hello from UK, will be watching progress with interest. The mighty CBX is still on my radar (despite already having owned a serious amount of bikes already). We have a magazine over here called Classic Mcycle Mechanics and years and years back the then editor had a CBX which had to have serious engine surgery to make it right. Seem to recall a partially blocked oil gallery had caused engine oil starvation in that case. And it was thought to have been like it through production too !! It went through a proper engineering workshop and quite a bit of money before it was finally right. On the good side, these bikes are making serious money over here now and I guess the same in other markets ? So, worth the outlay to get it how it should be I would imagine. Good luck anyway and looking forward to seeing an eventual finished bike. Think you are doing right to try and keep as oe as possible. 👍
Thanks Gareth! Yea this bike is a prime restoration candidate for sure being very close to stock and in decent shape elsewhere. I wonder if any of these developed oil galley blockage from pieces of the engine case breaking of from the casting lines? I plan to knock back some edges in this case as some portions have scary bits barely hanging on that could easily cause damage.
Thanks - think I know what you mean ! in fact I seem to recall in the article that the machine shop carefully dressed any rough burrs they found in the casings while going through the entire rebuild, having already found a blockage... probably would not happen these days in modern production processes (?) Good luck anyway, always nice to see these projects. I should add my skills go as far as doing an oil change and tyre pressures so again its quite interesting to watch someone tackle a "proper job" 🙂👍
the slotted holes in the cams is because someone back in the day degreed the cams (timed the cams)
In the U.K. they announced the new twin cam 750kz, 900f & the CBX in 1979, I was 18 at the time and couldn’t score enough credit for the CBX so I had to make do with 750. I rode a few of them over the years it’s a major regret I never owned one. I’ve seen digital pizza so I’m interested to see your progress 🇬🇧👍
Pete has really put out some solid content on his restorations. I don't plan to go as in depth with mine but ill capture what progress I make for sure
@brickhousebuilds Friend, do you recommend grinding a fz400r engine crankshaft and reassembling it? I would really appreciate your reply...
I have no idea there. I am not a machinist so I would not be the best person for advice
Bro. I love how clean your shop is and how organized you are.
Great to meet you.
Thank ya
Thosé Jáps wéré Amáyżińğģ
an easy way to test Big end clearance is to position the Engine so that the Cylinders are beyond horizontal
I.E. leaning down
turn each Piston to T.D.C. and slightly beyond so that the Con Rod is pulling the Piston toward the Crank
then place a rod of plastic or timber on the Piston Crown...strike the Piston top with the heel of your Hand..
any Big end clearance will be taken up and it should be silent.
any click or knocking sound means that there is Big End wear.
I am definitely going to use plasti-gauge for an actual clearance measurement
A CBX I did work on had the same issue with cylinder 5. They stripped the piss out of the spark plug threads. I believe it’s because that cylinder is so close to the frame, they weren’t careful when reinstalling the spark plug and cross threaded it. I was surprised to see your bike with the same issue.
Yeah I have found so many issues from poor work on this bike as you will see
Wow, I hate when people destroy engines when they try and work on them. 90% of the time engine failure is people induced.
We all learn as we go but yea sometimes just leave it to someone who knows what they are doing
You should buy a 20x20 utlity shed for long projects, and engine rebuilds. this would keep your shop open for customer work
Oh I'm far beyond that. Also, I don't do customer work anymore. th-cam.com/video/BLGHByNU-ow/w-d-xo.html
When You come to the bearings and crankshaft pay attention to the marks on them. See a good Honda CBX 1047 repair manual.
Oh yeas already past that. I have everything I need to assemble the lower end of the engine but still need to do work to the head
Brick las camisas de cilindro se pueden extraer y reemplazar del bloque conjunto? Saludos
Yes they can.
The way the screwdriver tip gets in there is; a screwdriver is inserted into No: 1 spark plug hole to see when the piston is at TDC. After finding TDC "they" forget it's still in there and then crank the engine over on the starter or kick.
Very likely
Dude that is Wild. Hey, at least you know the worst of the surprises are over. Also, that means we will see a full engine work done which is what I am looking forward to as well.
Yea this one is an adventure for sure. I'll try to document what I can but time will tell as I have many things happening these next few months
The shard observed in the gearbox isnt the cause. If it was, the gearbox would be in much worse condition.
The cylinder head had a lot of problems and was the ultimate cause of it seizing. Still alarming to find a bug chunk of aluminum
18:23 I use ready meal containers. Sometimes they can work out really useful.
They are super convenient and cheap too
Wow this thing was running recently? So disgusting in there, looks like dead bugs mixed with old oil where that screw was
Pretty nasty indeed but no this has sat for probably 25 years or more
Love the engine stand B.J...I'd say it's paid for itself already & otherwise it'd be real 'Heavy'.. Nice teardown vid. 😉🏴🤘🙏
The stand made me so happy on teardown. So much less headache and decreased potential for damage. Assembly after painting it will go much smoother as well.
Agree man that engine stand is nice and well thought out.
funny looking t shaped main cap!?
Please put link episode on description. Because your video jumping"
Can you explain what you mean by jumping? Is the playback not right?
I should have everything linked correctly in the description already.
The episodes of the video are not in order. 1 job is not finished, do another job. then return to the previous job. do 1 job until it's finished. then took another job. or provide a link to the job in the description if you want to do another job.
Sorry my english bad. I hope u understand what i mean.. 😃
When I find out (AND I WILL FIND OUT!) who did the prior build, I will discipline him physically. And severely.
Seems excessive
@@BrickHouseBuilds I've got a bad back so maybe I'll let it slide? IDK. Just remember he nailed that plug in with a lump hammer! And crooked at that!
Bro, that piece in the transmission was on the bottom of the block until you turned it around.
That was not the cause of the lock up.
It was probably the screw or the screw-driver tip.
Exited in the moment but it was lodged in the gear making me think there was a chance it was held in there. Regardless it had plenty of problems but I feel it was 2 stuck/bent valves after tearing the head apart
@@BrickHouseBuilds Makes sense.....
The screw and the screw-driver tip can bend the valves.
Were they in those same cylinders?
@@VeggiePower303 no. Cylinder 1 and 4. #4 had questionable valves
Love the choice of music and overall editing process has kept me engaged throughout
Glad to hear it
those piles killed more riders then most bikes. Hi speed and poor handling does that
Sounds like overconfident riders. Any bike can kill you. Granted these are said to be underpowered on the braking side but that is up to the rider to keep in their mind
Whomever had the engine before tried to find TDC cylinder 1 with a screwdriver
Very possible
The engine size:gearbox size ratio on these is insane. It's a wonder Honda (being Honda) didn't mount them inline with the frame and have a shaft drive. Back in the good old days when Honda would experiment unapologetically. It might be great, it might suck, but dammit they were gonna try. Nowadays it feels like if it's not a race/super sport bike, they're not gonna go crazy on it. Build a 160hp motor, but only give it 80hp so they maintain that Honda reliability.
A strange comment for a motorcycle video but.. I'm enjoying the down tempo jazzy beats in your video's. I obviously love your actual content as well. Just saying.
I appreciate that. I actually get multiple comments saying the music is crap which I firmly disagree with.
@@BrickHouseBuilds Much appreciation from Queensland Australia 🇦🇺
I didn't realise that was a 6 they are getting hard to find i heard that they put the same engine in some race cars i bought one back in the 80s because nobody really wanted a six cylinder bike they went well for that era but lets face it they sounded amazing but they are kinda ugly and really don't handle.
Apparently these handled well for what they are. Definitely gorgeous bikes
@@BrickHouseBuilds most definitely and i wasn't trying to be negative in any way I think that they were engineering at it finest but in saying that if you were a small guy and dropped them well you understand that said not a lot of mechanics understood how to tune them i mean to sync 6 carbs was pretty difficult because of the fact not many people had the expertise or equipment but as time goes on i think that advances are less intimidating, I actually don't know how much money to restore these bikes but my guess is that it would be expensive.?.
L like yours motor stand ,very good jobs ,it s really smart👍
Thank you much! It turned out fantastic
Your intuition was working well. So glad to see you loosen the small bolts on the cam chain tunnel and at the ends of the heads FIRST. Did you ever find where the small screw came from? Any chance of finding a stock cylinder liner from someone? I also think the aluminum chunk in the transmission was sitting in the bottom of the engine, but not in an area where it fell into the sump. Your engine stand worked well. I prefer the type that mount into an upright stand on wheels, but they are time consuming to make. I look forward to seeing the reassembly.
Thanks Miller. My preference would have been to rotate the engine and do cam removal in the proper sequence but I had to do what I had to do. Another person suggested the screw looks similar to a tank badge screw which I would agree with. Didn't come from the carbs but upon first seeing it in the video that was just my first guess. I actually had potentially promising news from the machine shop today on the necessary bore amount so we will see.
Im going to look again for a break point for that chunk but I doubt I'll find any evidence in the case
@@BrickHouseBuilds Not to worry, the chuck of aluminum may not be from this engine given the level of workmanship you have already seen. Watch the steps when reinstalling the camshafts, it is possible to miss time the left and right sides of the engine causing both cylinders to fire on the same TDC. It makes it sound like a triple and the long cam chain may break in a very short time. Also, the parts lists do not show a lock washer on the cam sprocket attaching bolts. Good luck with the rebuild!
@@millarfarewell5343 Thanks Millar! I have 4 new cam bolts ready for assembly. I don't trust the ones that came out!
one would hardly believe that this is a motorcycle engine
An inline 6 does look crazy as a bike engine
It looks like a mammoth task to stay organised; that would probably take me the longest, and I would still have a panic attack.
Its a necessity. Spending time up front saves it on the other end for sure
@Brick House Builds I discovered that when I rebuilt my first Carburettor last year.
Lots of bags, labelling notes, etc.
I was amazed to see how long I could remember where things went and where I put it.
It was a great winter holiday project and did other things as well.
I need to get some of those organising containers
That crankshaft looks like it could go in a car engine...
Lol almost
Crazy shoiciro honda
Luck you decided to investigate and strip that motor BJ
What the hell happened with that screw driver tip ?? He might have been working above the engine with the spark plugs out ! Who knows
Thats a thought for sure. You can see the scrape mark on the piston where it took off the carbon. I just hope it wasnt from the side...
I in absolutely no way want to ever attempt to get all 6 pistons on a cbx started back into the head. That way lies madness.
I hear its not too bad actually. These have a good taper in the cylinder. We will see though as I could be way wrong lol
@@BrickHouseBuilds I almost had a stroke trying to get 4 carbs back into a katana once. 8 wobbly boots all at once, down in a hole. The pistons might not be too bad come to think of it. The ptsd in my head imagined starting all 6 at once like they would all be at the same height while wrangling that slithery timing chain and holding the head by hand.