Honda Trail 70 crankcase assembly | Redline Update #83
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- The traditional Redline Rebuild is just an engine, but in the case of the Honda Trail 70 Davin is currently working on it's just one part of the bigger machine. The engine on these small bikes goes together fast enough at normal speed that the time lapse is almost overkill. Think we are joking? This week’s Redline Update proves it. Let's just hope Davin can keep track of all these little parts. They're a little smaller than he's used to.
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I had the same exact CT-70 (same color even) when new; it was a lot of fun for an eleven-year-old.
I've always tossed my bearings in the freezer the night before re assembling an engine.
Yup. Freeze them suckers first. Also a little heat gun on the case.
Heatgun is the key.
Yup, the only safe way to do it.
A house hold freezer is at best around 0F, get a cooler of dry ice and you have -109F
Bearings in the freezer, halogen lights on the case half.
Nice 👍
That little pump runs a gasket......weird
Altro sbaglio ad inserire i cuscinetti nei Carter motore, mai sentito parlare di dilatazione termica, il martello va bene solo a spaccare le cose. 👎👎👎
I never thought that I would ever use the words camshaft and cute in the same sentence! LOL
David promised us a link to Jim's blog and encouraged us to check it out. The Hagerty folks gave us a nearly a dozen links in the description, but not one to Jim. Please include it.
Davin
Came to the comments to see if I was crazy!
It's there now!
It's a nit-pick but you shouldn't use car oil (Pennzoil bottle on bench) for a wet clutch. A lot of them have friction modifiers in them that are too slippery for the wet clutch to overcome and they can slip. Whether this bike can make enough HP to do that I don't know but it can be a problem in bigger bikes.
I am the grandson & son of original owners of Sandusky Motor Parts & the original dealer & seller of that Honda CT 70. We couldn’t be happier to see that bike still bringing joy happiness so may years later. We are also happy to see you restored our dealership sticker to pass down with the history of this bike for many more years to come. From the Ellis Family THANK YOU
Raymond Ellis lll
Ellis Family Motorcycle & ATV Repair
Im sure Dad & Grandpa are looking down proudly 🙏 🙏
Instead of warming the whole assembly ... couldn't you just super cool/freeze the bearing?
That's what I was going to suggest as well...
Thats usually what I do. You can warm things a lot easier and farther than you can cool them. A deep freeze gets to zero, liquid propane will freeze to about 20 or 40 below. If its 70 in the shop, and you freeze to 30 below, thats only 100 degrees different. If you warm to 370 and its 70 in the shop, thats 300 degrees different. Also aluminum grows faster than steel from temp change.
4 minutes in and i can show my wife why there are bearings in our freezer.
I know you probably used what you had on hand to soak the clutches, but found a little hack. 1 gallon zip lock bags. Use it when putting transmissions together, they seal up so you don't have to worry about contaminants, don't make a mess, and it takes less fluid in the bag to soak the clutches. Keep on grinding man, these videos are great!
I tried to complete the same project in 1977 when I was 16…
-It never quite got completed
I rebuilt my CT90 engine about 6 weeks ago, first engine I've ever rebuilt. These horizontal Hondas are incredibly well engineered, they're almost impossible to put together wrong, I hope, lol. I'll find out later this summer if that's true. This was a good break, time to get back to sanding primer on the Trail 90!
I had to do my ct70 engine last year,the kickstart shaft was broken on the splined end,they wanted a thousand bux at a shop to do it so I did it myself, I took pictures of the disassembly and that helped immensely. They are simple but well engineered engines for sure.
Installing the bearing in the case half was brutal....could see from here it wasn’t square
So many parts; so little horse power.
Been around these engines since before i could walk (im 40) and they are just awesome.
Hot tip, first start-up always remove the top rocker cover and confirm oil sprays out.
I have a friend who wanted to use some SUPER lubricating oil in his Honda DONT DO IT! WET CLUTCH will not work. I told him that stuff is way to slippery thankfully he listened .
also do not use automotive oil the detergents will cause slip use only cycle grade oil (motul,bel-rey,etc)I learned this the hard way on my RM80B way back in the 80s.
Exactly. Any oil that has a friction modifier will cause wet clutches to wear prematurely.
9:30 made me LOL when he angled the board to block our view of the gear.
Mantap pak👍
Next groom/msx engine build maybe?
What is a vapor hone ?
Lucky that's not an early 80s Ducati, either those bearings would fall in with 10 thou clearance, or the housing would break when you pressed them in😁 ps my lovely wife lets me use the house oven for heating up parts, and tempting hardened parts, oh and baking painted parts too❤️😁😍
Really like your videos BUT STOP WEARING A RING WHEN WORKING IN THE SHOP!!! You are teaching beginners BAD HABITS. Wearing of a ring while working is a firing offense in some shops.
I can't wait to hear it run again!
I see that part in engine same like honda c65, c90 ,c110... the engine of this model is difficult to damage and durable. my honda c70 motorcycle from 1980 until now is still in use. back in the 1990s many teenagers in my country modified this engine for drag racing
Ohio is FULL of gear heads - so glad to hear one helped you out with the case cleaning. But I don't see that promised link!
Whoops, we forgot to add that. www.jimsworkshop.us/
@@Hagerty Thank you very much! Looks like good work goes on there!
Excellent build for the old 70! 😎👍🇨🇦
Cringing watching those bearings getting pressed in. Heat the case slightly, freeze the bearings. they should drop right in.
Have fun with that timing chain
It’s so obvious that he knows nothing about motorcycles. When I was a teenager in the late 60’s I used to do engine rebuilds in my parents driveway. He was obviously winging it the whole way.
Without an oven you can heat the bearing bore areas with a MAPP torch for a minute or two then drop frozen bearings in. Typically they will seat without any need for pressing.
A little mustard or mayo on your shirt when you got back from your dinner break would have been a good gag.
You're doing well so far Davin, can't wait for the next video.
Hey man, how do you fit the bearings? Do I really have to teach you everything?
Bearings do not fit cold.
You must first put the bearings in the freezer the night before, then you must heat the crankcases to 100 ° celsius (boiling water temperature).
Then take the bearings one by one, spray them with Teflon oil on the edge and put them in their seat. After the first, you will pull out the second from the freezer and so on, until the last one.
If you have done a good job, the bearings fall freely into their seat with a click and the job is done.
You have to be ready and fast because the bearings heat up quickly while you are handling it and they have to be put in their place in a short time.
When the bearings heat and the crankcase cools they will stop moving.
In this way you have not stressed the casing using the press and, above all, you have not worn out the seat edges.
There is a few hundredths of a millimeter of interference between the diameter of the seat and the diameter of the bearing. The aluminum takes a short time to wear out and then the next change of bearings they could move inside the seats. In that bad case you can throw away the crankcases.
I had a Trail 70 as a kid , and I rode that bike obsessively . I have no idea how many miles I put on it ,but it must have been thousands and it never gave me a bit of trouble, the only thing that was changed was the oil , a couple sets of brakes and three or four sets of tires .
is every thing available for an engine over haul still ? why is the old Chevy hood open ???????????
I took my engine to metal shop in high school. I buffed it on a big wheel and made it shine like chrome. Piston too!
Do you have catalog of honda cl50 in 1966?
Can you give me file?
I might have opted for a brass drift rather than steel-on-steel for those bearings........
Throw the bearing in the freezer a day before install. Heat the case with a heat gun and it’ll drop right in.
The toaster oven would have been sufficient heat for the case if you had put the bearings into the freezer in a sealed bag overnight.
Thanks for dabbling with motorbikes! I hope we see more of them in future videos
Could have always frozen the bearings as well.
So who is going to tell him he was missing the shim of the bottom of the input shaft. Or shall we hope if was floating about in the bottom of the case.
I took my engine apart today. From a C70. Cool to see this.
Solid episode.
might be wrong but I use a heat gun for the cases and the bearings go in the freezer, it goes perfect and no need for hammer
Guess what u buy parts from asian country for that engine 😅😅
you said your friends link would be below but it isnt?
You don't actually need to soak the clutch pack, they will get wet once you fill the engine with oil.
Freeze the bearings to ease installation, just saying.
Ahh the most ubiquitous motorcycle engine in existence, have been inside these many times
Most enjoyable -always!
Must have been working out, lifting that heavy engine and transmission like that.
😂
OLD trick I ALWAYS put bearings in the freezer for hours if not over night before install it make it so much easier., Just an FYI.
Well Done Davin .
Wherr did he got the assembling book from
Why didnt you remove the studs with two nuts?
I spent a few weeks rebuilding 2 Honda XR80 on part time for my kids a couple years ago, I had a blast. My wife said I looked like a kid playing with LEGOs.
You look like Zack Synder the director
A classic 70's Honda MC engine. The only tool you need to disassemble and reassemble is a Phillips screwdriver! Had a 74 CB350F which was pretty much the same deal...
I have a friend who wanted to use some SUPER lubricating oil in his Honda DONT DO IT! WET CLUTCH will not work. I told him that stuff is way to slippery thankfully he listened .
Tip: Take that ring off when you're turning wrenches. You simply cannot imagine how badly you can injure yourself when wrenching. Can strip the skin and flesh off a finger in a heartbeat.
Brings back childhood memories, had one as a kid. Thanks Davin.
Yes me too great little bike not very cool other kids laughed at me but it never broke down like all the yz 80 s they had used to tow them home from out bush
Hey, if you can't put the whole case in the oven, could you put the bearings in the freezer and achieve the same slipitin goal?
Thanks for the inspiration and keep on trucking!
Postman bike here in Australia. Oi oi oi
i am surprised many of the internal motor bolts are a Philips screw that are basically hand-tight, if you torque to much, it will strip the head
Thanks for sharing Davin👍
It's quite a job, Stay Safe👍
Just wanted to say thank you! I finally got one done. It's a 88 Toyota Corolla station wagon that I manual swapped and put a twin cam motor in it. It's not nearly as big a job as some of my other projects but the guys stepped in and helped me put it together a few weeks ago and it only cost me a case of Naturdays! Thanks for the reminder to get into the shop and get the projects done!
You say it's a new profile? What did you go for, a full roller? 😆🤣😂
Heyyy. Lo esperaba desde hace mucho. Muy buenos todos tus vídeos. Saludos desde Colombia.
regarding bearings .bikers usually we put the bearings in the freezer over night . make them shrink instead of warming something big up
I love the captions
Always enjoy watching Davin’s videos. Has a good skill set and a lot of knowledge, but doesn’t let it go to his head like some do. I don’t get the negative comments that people feel the need to drop.
@ 4:00 some shops use a heater (the same you have to untighten rusty bolts) to expand the casting, in order to decrease interference between the bearing & casting, up to the point you can press into position.
FYI > to assemble some transmissions, the heater is a mandatory tool. It takes part in the assembly procedure.
Always put in a new kickstarter axle when its a bit worn and you are in there, they are super cheap. And it saves you a lot of headaches afterwards.
You can just warm the area where the bearing is gonna sit with a little gas canister, here in Greece these engines are really common cause they are economical and we don't have money for gas 🙂
Muttering while puttering. The sign of true passion for the work.
For us amatures there is nothing like watching a master mechanic do his thing. Thank you.
I love this guy
Amazing what having the right tool can do for a project! Great build!
Son eternos esos motores honda y no consumen nada de gasolina como el econo power o el cub ✌️✌️👌👍😶
When is dyno day?
Tip, put bearings in freezer, heat the case, bearing slips in easier.
Did you guys change the big end bearing ? Nice work👍
Link for that cool engine stand???
mytrailbuddystore.com/bikebuildingstand.aspx
Amazing video the ct70 was an amazing dirtbike
glued to this rebuild and i've seen........many
AMAZING STUFF
Now , i understood the breakdown i had in 79 with the same bike 😄
So cool i remember when they were new in the early 69/70 !!!!
honda c70 from indonesian watching sir 🇮🇩
This has got to be one of the coolest projects you’ve done so far!!
Хоть Я ни хрена не понимаю вас но смотреть одно удовольствие
super didactique ! excellent et sympathique.
Hope you guys do a comprehensive tutorial on that vapor hone, they're not as simple as ppl make them out to be, its kinda like cnc machining, theres a magic recipe to get the results you want.
So true. There’s definitely a learning curve.
Kayaknya cepetan mekanik gw masangnya,
На китайских мопедах такие же двигателя
Top mechanic power
Davin I love watching you work and I wish I could be there to help you. I just wanted you to know that Japanese motorcycles use JIS screws and you shouldn't use a Phillips screwdriver with them. The factory screws are not hardened and the heads will strip out if a Phillips screwdriver is used. If those replacement machine screws are factory get a JIS screwdriver. If they aren't then the Phillips is fine.
Love your work, keep it up.