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View Full Version : Need some help with 1983 yt125 rebuild



nmarciano19
04-15-2019, 12:36 PM
So im in the process of fixing up my engine (new seals, bearings, gaskets). I have looked on bike bandit for the seals (already have everything else). Im looking at the crank seals and see 2 types listed. Is one for the wet side ( clutch) and one for dry(flywheel). Also should i put anything on them when putting them in like rtv or such. Already have yamabond 4 for the crankcase.

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nmarciano19
04-15-2019, 12:42 PM
Also whats a good way to lock up the flywheel and clutch to unbolt it

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Steve G
04-28-2019, 12:22 AM
There’s a tool for this. Stand by... looking for a link.

nmarciano19
04-28-2019, 12:27 AM
There’s a tool for this. Stand by... looking for a link.Found the clutch holder. To lock flywheel i just stuck some rope in the cylinder to lock it up

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Steve G
04-28-2019, 12:33 AM
Found the clutch holder. To lock flywheel i just stuck some rope in the cylinder to lock it up

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Copy. Post photos. I dig those bikes!

nmarciano19
04-28-2019, 12:52 AM
Copy. Post photos. I dig those bikes!Ill Get some tommorrow. Quality wont be that good, camera on phone is broken. However i still get some pics.

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RubberSalt
05-01-2019, 02:41 AM
There's a clutch holder and flywheel holder when assembling everything. You can use an impact to disassemble. After the rebuild, be sure to do a leak down test. This will confirm there's no air leaks in the motor. Air leak = lean = toasted motor. Leak down test video (https://youtu.be/zdq7NRcUIp8). You can make a tester for cheap, very cheap. If I recall, the seals are installed dry. You may want to reference the manual.

nmarciano19
05-05-2019, 01:38 PM
So i almost ready to get the yt back together, and it seems i hit another bump. Ive ordered new engine mount dampers, however its looking like the metal part of the damper frkm the old ones is still in there. Anyone got any tip on how to get it out.

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RubberSalt
05-08-2019, 04:50 PM
Unless it's worn, I'd clean it and leave it. Im also guessing your talking about the insert into the cases? Those are simply pressed in. You can tap them out.

nmarciano19
05-08-2019, 04:51 PM
Unless it's worn, I'd clean it and leave it. Im also guessing your talking about the insert into the cases? Those are simply pressed in. You can tap them out.Got em out. They took aome doing but new ones are in

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