Hello fellow, riders.
I recently picked up a '78 Sachs as a new project.
The first issue I want to address is the rear wheel. It doesn't spin easily and when it's forced, it turns "once" and then I hear a puffing sound.
Any help will be greatly appreciated!
Pull the decompression lever
sounds like your clutches are stuck engaged.
The valve isn't connected to a cable, but I pulled it manually, though the linkage doesn't seem to stay on easily.
Even after pulling the entire valve out, it's doing the same thing.
Would spraying some brake cleaner into it and force-rotating the wheel several times free it up?
Or should I just go ahead and take it apart?
Take off the drive chain. If the rear wheel still has issues with the drive chain off, then you need to take it apart and figure out why. If it doesn't then the drag is coming from your engine/trans and that's where you need to look.
yea you definitely got some decomp issues, but that's separate. if it's puffing and turning sortof difficult that sounds like you're turning the engine over, which shouldnt happen unless something was engaging the clutch
Great. Thank you.
I took the chain off and the wheel spins freely, so it has to be the engine/trans.
Sounds like clutch is staying engaged .. the decompressor cable also pulls the clutch .. it might need adjusting
I opened up the tranny.
What's the best way to remove the clutch nut?
I've seen using a piston stop, but have heard that can seriously damage the piston.
I had the same problem with my Sachs when I first got it, you most likely need to adjust the clutch. The link below is the manual for the Sachs moped, page 23 ‘Adjusting Starter and Decompression Lever’ is what you need to look at.
yea, video linked on here, and some tips to remove the nut.
I usually use some rope in the plug hole, but i've used a piston stop plenty and braced a driver vs the back of the flywheel, that last one's especially risky but it can work. Piston stop's a little dangerous mostly because the plug hole is angled, so it's the corner of the stop that's busting against the piston, but it does still work. it's less than ideal but still a workable solution.
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