Turning a 250 into a 280. Dear ATVC: I have a Suzuki Ozark 250 that I want to overbore. There is a kit made by Four Stroke Tech to get it up to 273cc. The stock engine displacement is 246cc, cylinder bore is 66.090mm, piston diameter is 65.88mm and the engine stroke is 71.7901mm. So […] More »

Quality and country are not synonymous. Dear ATVC: After looking at your coverage of the CFMoto Z10, I think this is going to be a game changer. Especially if it is priced right. My question is why don’t more Chinese companies take advantage of this untapped market? Traditionally off-brand Chinese manufacturers have “played it safe” […] More »

Dear ATVC: Sort of a strange question- When rebuilding the top end on my Can-Am DS, I noticed that the piston doesn’t appear round so much as bowed out for lack of a better term. If the cylinder bore is perfectly round, how can this possibly work? Or did I just get a poorly cast […] More »