Yamaha Champ questions
I have a Yamaha Champ 50cc that I put 3 different jugs/pistons in, and still can't develop over 50 lbs compression. I put oil in the cylinder and can get 135 lb compression for about 5-6 revolutions, then back to 50lbs again.
Can anyone tell me the standard bore size, size of piston, and ring end-gap?
Any help would be appreciated to get this running. Thanks.