How-To: CB500 CB550 CB650 Top End Rebuild
ฝัง
- เผยแพร่เมื่อ 5 ก.ย. 2024
- www.howtomotor...
Click link for full length video, tools list, and more!
www.howtomotor...
Learn How-To Repair and Maintain your own Motorcycle!
Now on Facebook. Give me a Like.
/ howtomotorcyclerepair
Sign up for my newsletter! Get emailed when new videos come out.
www.howtomotor...
Tools/parts used in this video (bought most from Amazon)
Valve core removal tool
amzn.to/1Gvp4qQ
Compression tester
amzn.to/1FPI6Io
Super scraper gasket remover
amzn.to/1MXhF54
Vessel impacta JIS P3 screwdriver
amzn.to/1LRHgvz
Vessel impacta JIS P2 screwdriver
amzn.to/1LRHzX2
Manual impact driver
amzn.to/1GvpRIl
Tusk valve spring compressor
amzn.to/1GvpVIg
Lisle valve lapping tool
amzn.to/1LRIrLq
Valve lapping compound
amzn.to/1OMmpvV
Cylinder hone
amzn.to/1Gvqjq8
This video covers a top end rebuilt/refresh on the cb550 and cb500 models, all years. I've worked on a few of these in the past year and the all exhibit the same problems: head gasket oil leak and low compression due to carbon build up on the engine valves. Taking it all apart, some soda blasting, and new gaskets will restore the compression and get rid of the leaks.
Great video! I purchased the full version from you which was quite helpful in the refresh of the top end of my '71 CB500. One item I'd point out is when you put the rear cam chain adjuster back on the cylinder before lowering it onto the bottom end you don't make mention of making sure the bottom of it fits into the small slot down in the bottom end. I found this out the hard way, I bent mine up when it missed the slot. I was able to straighten everything out and after several tries got it in correctly. Otherwise, very comprehensive video. Well done!
I can’t seem to get the chain on the sprocket properly it’s like my chain is to short.
pretty basic stuff there, even in the speeded up portion. Reminds me of Automechanics class in the early 70's. Kudo's to your teacher, you were taught well..nice and proper and nice use of tools. The full length video looks like it would be a lot of fun.
Thanks for the compliments!
Very detailed and careful with your words. Very smart as a technician should be. I love it! Thanks for the lesson 👍
Just bought the full video and had a quick look through it. Looks great! Will make things easier when it's time for the rebuild.
Thanks so much for the purchase! Let me know if you have any questions along the way.
Great video, i've learned much.
this is really great. nice work.
Thank you!
Thanks for making this video! Will it help me with my 1978 cb550 K or is it much different for the earlier models?
Same
@@HTMR Thanks!
Hi Matthew, great video and channel. I'm assuming the principles in your video the same for most older Honda engines. I want to do the same on my 87' cbr1000 engine. Will be picking up your video soon.
Tip tricks principles...yes. However your engine is much different.
good work man!
Thanks, Victor!
Thank you!
yep, is it me or it seems you missed the second pass on 3rd?
Thanks bro! Helps alot....was wondering where i could view the 2 hr + version with audio
Here ya go: gum.co/LtpvD
Great video. If you had one for an 82 Yamaha xj1100 I would totally buy it...
Me too ! That would be fantastic !
Bruh you've saved my 80 cb750 custom! Your vids are sooooo freaking informative! I'm working a cb900 now! Leak down test on all cylinders are under 10% so why am I not getting compression over 30psi? Not enough rpm? I'm turning it with a 14mm on the rotor bolt!
You need to use the starter motor of the kicker to check compression. What brand gauge are you using?
MatthewMCRepair INNOVA 3612 Compression Tester - 4 Piece Kit www.amazon.com/dp/B000EVU89I/ref=cm_sw_r_cp_apa_blYKAb3A6HHWM and I also have the remote starter switch as well! The compression tester works because of you I built a 1980 Cb750 that had sticky exhaust valves! I was thinking more revolutions from the starter huh?
Are you holding the throttle wide open?
MatthewMCRepair The engine is out of the bike on a table! I have the battery out and charged as well as the starter solenoid! At this point I'm gonna try to set up a bench starter like you have! I hate reinstall the engine just to crank it over for a true compression reading! Any help on how to set that up would be great! Nevertheless thank you for you content and your details on jobs! I've learned a lot from you!
Just apply 12V directly to the starter leads and she will spin. No need for a solenoid. Use a battery and cables to run the starter motor.
Anyone have trouble with the upper and lower heads(cylinder) sticking together? While trying to separate the two, the lower broke free from the block. Making it a painnnnn to get the top of the head off
This might be a stupid question, but what are you running to test the compression? This engine has a kick start if I'm not mistaken and you're some electronic mechanism off camera that's turning the engine for the test. Is it basically just an electric motor that is attached where the kick lever usually is?
This engine has electric start and I'm running jumper cables from a bike sitting off to the side. It also has a kickstarter.
Oh, thanks. I though they only put an electric start on the cb750.
Can the head gaskets be installed up side down? Do they have a top and bottom side? Do you use copper spray on them or no? Thank you
Should only go one way.
Do your full videos go on sale or are they set prices?
I run black friday sales that is about it.
In your opinion, a well cared engine. How many km does it last?
I've seen these engines last for 30,000 mi and then some. There are too many factors to consider though.
I hope you see this dude I’m at the top end where I’m putting the camshaft in and trying to get the sprocket and chain onto the mounting ledge of the camshaft and there’s just not shot I have enough chain here. You put it on so easily with a lot of slack and mine is definitely not like that😂 so stuck. Send help.
Tensioner retracted? Using the cutout in cam sprocket to drop it the lowest. I know it is tough, but there is a way.
Is there a major difference in top ends between 1982 CB650 and 1984 CB650? I might have to do a top end rebuild and want to purchase your full length video as a guide but the year difference is holding me back. Thank you
Yes totally different.
@@HTMR Thank you!
explain kawasaki z900 please brother
more videos 💪
Hi, I'm going to need to rebuild my CB750 DOHC engine. In my case the inlet valves leak so compression is way low. I know the engines are different but is the full video going to be of much benefit to me?
Your model is too different
the valves are supposed to have "wiggle" when they're at TDC. correct? that's how you can tell which is at TDC: 2 or 3, and then 1 or 4; whichever one has that wiggle.
Yes, there is supposed to be valve lash at TDC on the cyl you are checking.
Gotcha, because at 18:28 you're talking about valve lash like it shouldn't be there-unless #2 isn't at TDC right there?
If the valve had no lash then that could be causing leakage.
What do u charge to do this on a motor
Can i use the full version to do a top end rebuild for a 1981 honda cb400t?
No, different design.
I think in the gasket set, there is and is also seen at your video 8pcs of green o-orings? Whats the meaning of them?
They go under the valve guides.
Thänks. Thats what I was thinking
If engine has bad valve seat o-rings, what could be the symptons?
Hey Matthew, great video.
Where can I access the full video? I checked all over the link you included and I couldn't find a way to see it.
Direct link: gum.co/LtpvD
Hi Matthew, another great video! Have you found a gasket brand that is acceptable, or do you recommend sticking with NOS?
I used NE brand w/o issues.
How did you hook up the starter
To a battery.
Matthew,Could you overhaul the legendary Kawasaki Z or KZ 900 or 1000? Preferably 1977 or 1978.Thanks.
Yes, someday.
MatthewMCRepair
Great I’ll be waiting. Thanks for the reply.
You mentioned that there was no possibility of getting the timing off 180° because you didn't have the cam installed. I hear all the time of people getting their timing off by 180°. Can you explain how that happens and why not having the cam in would prevent that?
All you need is to have #1 at TDC, then hook up the cam.
Oh, I get it now. The engine has to be at TDC *of the compression stroke* of cylinder #1 for proper timing but with no camshaft in place you just need to worry about TDC and not whether it is at compression stroke or exhaust stroke since without the camshaft in place that has no meaning.
Correct.
never hang chain out like that..good way to tear base gasket...feed chain up first and hang it off something with bungee cord or whatever
You should make a full engine + carbs rebuild video!!!
Bottom engine rebuild is in the works. I plan on doing carbs in the future.
I hope you are finishing it soon because i would buy both. I want to make a full engine rebuild on my CB550... When are you expecting to release it?
Well, engine is still under workbench. So a few months for sure. I don't have a set of carb in hand to do that video.
I've got a set of '73 500 carbs that need to be rebuilt. You could use those for making a video. Got 4 kits for the carbs also. 1 has a stuck pin in the float and pours gas all over the ground. I could ship it to you.
How much would the rebuild and bench tune cost me? If you're interested.
On another topic, what is the easiest and best way to replace the front fork seals? Remove the whole tube assembly from the tt or just remove the oil and unbolt the lower bolt that is on the bottom between the axle studs?
John,
I can rebuild your carbs at $50 each. However, I'm slammed right now.
On the fork seals, remove the whole tube assembly. Loosen the top cap first though.
Matt, just subbed. Great channel so far! I just purchased a 1980 CB650 that needs an overhaul like this. Will the full length video be informative enough that I can do this on the CB650?
Yes, there might be some differences however will get you 90% of the way there.
Great question and appreciate it being answered. I acquired an ‘81 CB650 STD (5k miles on OD) in very good condition with it needing some adjustments made to it where the previous owner was either 4 ft tall or didn’t know what he was doing and a thorough disassembly, some cleaning especially anything at the bottom of the bike, some rust removal from the gas tank and the drive chain + sprocket (will likely end up replacing these) and very tiny pin head sized dots of rust on the mufflers and random other areas of high polish chrome including the wire spoke wheels, and there was splatter looking small areas of what appeared to be corrosion on both of the engine cover plates (high polish outward facing pieces that house the alternator/stator, gear shifter/sprocket+chain, oil pan, and whatever is in the last one, with 2 of these 4 plates having the Honda logo and referencing made in Japan) on both sides of the bike. This corrosion was elevated off of the surface of the metal similar to how a drop of water would sit in the same spot however, when I managed to remove it I was left with a stain in the clear coat that is sprayed on these specific engine cover plates.
Anyways, I’m getting there and am almost done with half of the sanding. I’ve ordered the Duracoat Clear coat aerosol kit with Trustrip, full gloss sheen in the clear spray can, extra adjustable nozzle, and added UV protection option and am going to spray all of the engine covers to replace the clear coat from Honda with the super hard unbreakable unpenatrable coating from Duracoat, and that should keep it looking as if I just put down the Flitz rag 😊
I'm doing a cb650 1980 rebuild. My gasket kit came with 8 small green 0-rings that I'm not sure where they belong. Any ideas?
Probably valve guide orings
Just bought an '83. How much different are these motors?
83 650?
Is it possible to have low and same compression on all cylinders? 45psi. maybe I'm doing something wrong. Engine is out of the bike just like in the video.
What brand gauge? Throttle wide open or carbs off?
@@HTMR Autozone part 3614. I did check compression before with this tool on another engine of a suzuki GS and it showed around 150. That engine was on the bike. Now I have this cb550 engine out of the bike just like yours in the video. No carbs. The strange part is that I'm getting the same low compression on all cylinder. , Normally It would be different readings so I'm nor sure if it needs a top end rebuild. Supposedly the motor has 11k but I cant very this. What made me check compression is that the motor is not very clean and looks like it has some oil near cylinder two next to the exhaust outlet. Its' not necessarily from the head gasket but I like to make sure. Thank you
@@tjj6583 Does it have a schrader valve on the end that goes into the head?
@@HTMR yes the schrader valve is on the cylinder end but I was also using that fixed extension that came with the set I will try again without it.
120 110 100 120 compression result. Guess it needs a rebuild.
Hey I’m considering buying a video for my top end rebuild, I have a 1977 cb 550, which is different than the earlier years. Would this video still apply to my bike?
Yes
Hi just wondering if you know if CB550f engine is the same size or bigger (in term of dimensions) than CB350F? Thanks in advance!
Not sure sorry.
how much different would this process be for a CB750? obviously asking from a very inexperienced rider trying to learn
What year?
MatthewMCRepair 1978
That motor is a lot different. Maybe I'll have a vid on it in the future.
how did you test the engine compression with the engine out?
+Yohan Cho Fast forward to 19:46 and the video shows you how.
hi matt, i just bought an 82 yamaha xj550 maxim, and i want to restore the entire engine, i dont know if your video would help me to do that, what do you think?
also i want to ask you how much are your services?
This video will not work for your model.
Hey Matt love your vids man, when you do seafoam through the cylinders, do you pour some through the spark plug holes then change the oil in a day or so?
What problem are you trying to solve?
MatthewMCRepair trying to solve low compression, but I am going to rebuild the top end and do it right, I already installed a dynatek ingition and coils and rebuilt carbs on a chopper I'm rebuilding.
How do I go about buying the video? I tried to follow the link but couldn't find a way to purchase the full length video!
Here is the direct link: gumroad.com/l/LtpvD
Bought the video, loving it so much, I'm getting ready to hone the cylinders, I clicked on the link but am having trouble for the size, I have a 1976 550 cb as well, do you by any chance have the sizes of the honer you bought?
Thanks for the compliments! Here is the hone I bought: amzn.to/2iDm8Du
I bought the full length video now it won't play or won't let me download.
what did u apply on the valve retainers?
+BboyScubaSteve I use a dab of grease on a small screwdriver to install valve keepers.
what is the tool you used to clean the cylinder head with can you direct me to where I can get it?
Can you please reference a time in video? I'm assuming you mean the gasket scraper? Links are in video description.
MatthewMCRepair 32:40 the hone tool and I see the come in different grit. any recommendations would help I'm going to be doing a top end rebuild on a Yamaha xj600. also can you recommend a proper piston ring kit for reinstall? thanks
Check out this site for hones: www.brushresearch.com/
I can't recommend a piston kit other than OEM. Make sure to check ring end gap.
MatthewMCRepair will do for sure .. I appreciate you taking the time to respond as you actually alway have last 2 questions for now when I hone should I do it in step 120 240 320 or witch one should I use? and I plan on also changing the cam chain is OK turn the motor when it's disassembled... and actually if you want to email me a price on what you would charge to put my heads valves in spec after I'm done cleaning that be cool I'm in MN so not to far from you if you're in Chicago
Use a single grit. Here is a list depending on rings used: www.enginehones.com/technical.html
Yes, you can turn motor over with cam chain attached, just make sure it does not jam up. You will have to "help" it along.
I don't do any machine work, so you may have to look elsewhere for a valve job.
Great video ! Is a honda cb350four engine simular to this??
Kinda. I've had a guy use this video on a cb400 and it was helpful to him. The components under the valve cover are slightly different.
Okey thanks for the quick reply thanks !!
If you buy the video and you feel it is not helpful for your model, just ask for a refund.
Wow ok great thanks !!
how did you get it to crank without it being in the bike??
Jumper cables from nearby bike to starter on engine.
These days you can use portable power Banks
I have a 1975 550 four that I would love to get running again..Want to do a video of the rebuild? Or whatever it needs.
Where are you located?
right now I'm in Los Angeles .But I may be moving out of state this year just for the fun of it (I'm retired). :)
I lived in Studio City for 1.5 yrs. It was a great time. I have a 550 motor in my garage that need a full rebuild. I will get to it this year.
That's not suppose to happen..It's suppose to be mine. I've been waiting over 15 years for this. I've owned it sense 1976.
Well then ship it here, I'll fix it :)
Would this be applicable to a 1976 cb550k?
Yes.
Hi
Do you have a bottom end video? I am willing to buy a top&bottom end Rebuild video of the cb550.
+cygamer No, I don't have that video. I'd be happy to create one, just need someone to give me their engine :)
could this video be used for a 78 cb400?
Yes, however they are different. The valvetrain and oiling under valve cover is different. I've had a couple people buy for your model and it did help them. If you decide to purchase and it does not help you ask for a refund.
This may be a dumb question, but would this video be useful for working on a CB350F? (uuugh, such a noob!!!)
Your 350F has a little bit different of a valvetrain. However, I've had people buy the video anyway and it has helped them. If it doesn't help you, ask for a refund.
is this at all similar to a cb650?
650 is different. What year? I'll double check.
1980
Looks like they are very similar. I'd get the service manual along with this video since some torque specs etc might be different.
Any chance you've got plans for a bottom end cb550 rebuild?
+Drew Brownell Drew, only if someone brings that in for service. I'd love to do a video on it, just need a motor :)
for the leak down test: "put a couple of squirts down there"
-proceeds to put 15 squirts down there-
made me comment. also, know I know how to do one of these.
+0Sirk0 I mentioned in the video that I had to prime the oil can. The first "10" pumps did not squirt anything. I put about a teaspoon in.
I go to that link and click "I want this!" and nothing happens.
Did you enter 25 in the amount box?
No I didn't. I thought $25 was the fixed price. Anyway, it works when I do that.
Thanks for the purchase and enjoy the video!
I'll just go find a free one
Good luck with that Evan.
MatthewMCRepair sarcasm
I got my CB550 for free from a guy who had it in a barn for 20 years. It is mostly complete it’s just missing the exhaust. The engine is seized, but I’m planing to rebuilding it.
i wud love to watch the full video just for entertainment but jesus crist 25 is way out of my limit.
@MathewMCRepair - Really enjoy the videos (CB550 mostly) and think that you're doing a great job and service for others, especially first time vintage bike owners looking for resources. However, one critique. A motor is electric. Anything that combust is an engine. Please carry this distinction forward in future videos as it's very difficult for many people to trust a mechanic that interchanges the two terms (and yeah, I get that a high percentage of the wrenchin' population do this, however you are creating a "How-to" video...accuracy matters. Please join me on my quest (haha) to change this in our culture ;-). I'd worry someone would hear that and wouldn't stick around to view the rest of your video based on a perception. Keep up the good work.
Ok makes sense
Must be why they call them enginecycles...
A motor is anything that creates motion, could be electric or IC. An engine is anything that converts heat to work.
@@christopherdelsordi4176 Thanks for supporting the argument! Exactly my point. Motors do not use heat to convert "something" (fuel, steam, etc.) to mechanical energy. They use "electron flow"... How silly would it sound to ask the "Tesla Guy" "Hey, What engine is in that?" LOL.
1 year no answer :/
What is your question? Sometime I do not get notification of comments. Best to email me here: www.howtomotorcyclerepair.com/contact/
This video sucks. You drone on for a half hour about your damn compression gauge, and just tease us with a few speeded up clips of disassembly. I'm sure I'll do fine since I'm not an idiot, it least I get the "keep tension on the timing chain" nugget of wisdom.
Good luck with your rebuild.
"im not an idiot" "It least".... lol did you mean "at least"?
I bought the full length video now it won't play or won't let me download.
Hey Jay, with emails going back and forth I'm sure you are good to go now :)