Quote:
Originally Posted by TominMO
The kit that Megadan listed says it is for 150cc motors. I'm thinking that if it would fit a 125, they would have said so. Probably there is something that makes it not work in the 125. Such as the stud spacing.
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I had to dig a little, but you are correct. Thanks for catching that. The CG125 is 85mm bolt spacing on the diagonal, the 150-300cc engines are 90mm on the diagonal. The 125 also has a 64.5mm sleeve bore in the cases and the 150 is 68.5mm.
Basically, the best you can do with the 125 engines is a 150cc big bore kit wth a 62mm piston. Otherwise, you need to start with at least a CG150.