This is a complete standard-sized replacement cylinder kit compatible with the Scrambler 500 models from 1996 to 2010.It fits part numbers 3087221, 3087224, 3089966, and 3086811.The cylinder bore and stroke measure 92 mm x 75 mm.The kit includes one cylinder, one piston, piston rings, wrist pin, two circlips, head gasket, base gasket, head cover gasket, chain tensioner gasket, exhaust gasket, and cam cover gasket.