S&S CYCLE 4" Big Bore Bolt-In Sidewinder? Cylinder Kit - 100" - Silver 910-0642 Tires Crankcase venting can be achieved

Crankcase venting can be achieved via two crankcase breathers

Billet aluminum tappet cuffs have a hard-anodized black coating and are stronger than stock to eliminate distortion

2x Ring packs which includes the top

Black Edition includes all the features of standard S&S engines

and head and base gaskets

S&S CYCLE 4" Big Bore Bolt-In Sidewinder? Cylinder Kit - 100" - Silver 910-0642 Tires Crankcase venting can be achieved4" Big Bore Bolt In Sidewinder? Cylinder Kit 100" Silver 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,