I have a suzuki ozark 250 and i want to overbore it but im not sure how much to bore it over there is a kit they sell made by four-stroke tech to get it to a 273cc. The engine displacement is 246cc the cylinder bore is 66.090mm the piston diameter is 65.88mm and the engine stroke is 71.7901mm so to bore the cylinder to 273cc how much would I have to bore into the cylinder. Any help would be appreciated ,thanks.

 

IMO, you are not going to bore any cylinder that much. I'd bet the FST kit has a cylinder with it.

 

The answer to your question can be found here:

https://atvconnection.com/articles/a...-big-can-bore/

 

Same answer as mine just longer...lol