1980 yamaha qt50

I have a 1980 yamaha qt50 moped. the kick start locked up. Upon investigation, the gears are fine and the kick start works fine.. I was able to take off the top end and the piston came out of the cylinder fine. when i turn the gear that moves the piston, the piston hits the side of the engine instead of going into the engine. It doesnt seem to move correctly. Again, the top end is off and the piston is free. Any ideas?

Re: 1980 yamaha qt50

pics would help. Bad crankshaft or crank bearings? How much play is there in the connecting rod?

Re: 1980 yamaha qt50

Looks like there is quite a bit of play on the connecting arm. And shavings. Think it's the bearing

Re: 1980 yamaha qt50

matt boda1nz /

I'm in des moines.. If you are around here I can help. (edited)

Re: 1980 yamaha qt50

matt boda1nz /

Oh, I see you are in carson. Do you make it to des moines often or at all?

Re: 1980 yamaha qt50

I do not. I have a friend coming over tomorrow night to take a peek. I'll let you know what I find

« Go to Topics — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account