My RM has a junk cylinder and I'm having a hard time finding a replacement. The '96 cylinder was a one-year part. Does anyone know if any other years of RM125 cylinders will work on a '96? The part numbers are different for different years, but the exhaust valves, cylinder heads, base gaskets, and other parts are the same from '96-'98. I know that sometimes a manufacturer will change a part number for an insignificant change that has no effect on the part's interchangeability. Or maybe the porting was slightly revised and a '97 or '98 cylinder will still work on my '96. Anyone have any insight?