Dear ATVC: Could somebody tell me if the top ends from a 1987 Suzuki Quadsport 230 and an 86 230 Quadrunner (shaft drive model) are the same? Any help is appreciated. 86230lt We spent many hours staring at OEM catalogs to determine parts compatibility and unfortunately it looks like none of the parts numbers match […] 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 »

Dear ATVC: When going to buy a new piston for my ATV, I was told that I had to make sure the letter on the piston matched the letter on the cylinder. Is this true? Why would the manufacturers do this? Though it’s not commonly done on modern 4-stroke engines, the letter matching game was […] More »