are all the 350's in polaris quads the same because i am helping out a teacher in shop class put a new piston in a quad but he dont know the year model or anything. from looking at it i think its in the mid 80's. but are all 350's on polaris the same

 

yes, the 350L engines are pretty much the same. the pistons will be the same from engine to engine as far as replacing, saying if you look up a replacement wiseco or whatever it will be the same for all 350's

 

thank you

 

one more question does anybody know the stock bore size