Bolt-In Sidewinder 4" Big Bore Kits Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frame
Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
88" engines are boosted to 100"
96" and 103" engines are boosted 110"
10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
Complete kits include cylinders, forged pistons, rings, piston pins, clips and gaskets
Not for use with S&S 79cc heads