I'me looking at a big bore kit to step up from a 67mm piston to a 70mm piston.The kit is made in China.
I am looking at putting it on a Zongshen CG250 engine.The stock cc ( in real math) is 219cc and the big bore kit would put it to 239.7cc.
Any input or concernesI should be aware off?? Does anyone have any experiances with this type of mod?