Top End

Revolution Performance, Llc Cylinder Kit - 139" - Black With Highlighted Fins - M8 Rp201-611W

Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepersComplete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructionsUse OEM manifolds and...

Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepersComplete kits also include rocker cover gaskets, head gaskets and miscellaneous hardware with instructionsUse OEM manifolds and...

Kit includes fitted forged pistons, pins, clips, rings, cylinders, head gaskets, base, and exhaust gaskets10.9cc dished pistons; 10.6:1 compression ratio w/stock 85cc cylinder headsFor use with stock heads or S&S heads with stock bolt pattern4.625"...

The Big Bore kit yields excellent results with stock cylinder headsEasy installation: no need to bore or split existing cases, just swap the cylindersCylinders are constructed from premium aluminum castings with cast-in iron linersKits include cylinders,...

S&S Cycle 132" Big-Bore Cylinder Kit - Black Granite/Highlighted Fins - M8 910-0847

S&S heads are available to be used with stock-style flat-top pistonsKits are fully assembled, and include stainless steel valves and high-lift (.585") springsIntake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base...

S&S heads are available to be used with stock-style flat-top pistonsKits are fully assembled, and include stainless steel valves and high-lift (.585") springsIntake manifold and gasket kits are sold separately; gasket kits contain head gaskets, base...

Kits include aluminum cylinder with nickel-carbide coating designed with larger water jacketsForged piston with molybdenum coatingSpecial gasket kitEasy-to-follow step-by-step installation instructionsAll are bolt-on; no machining required Yamaha -- YZ...

Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to 100"96" and 103" engines are boosted 110"10...

Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to 100"96" and 103" engines are boosted 110"10...

Bolt in - no machining, balancing or splitting the crankcases; install can be performed with engine still in frameCast Ductile Iron Sleeve in cast aluminum for superior heat transfer88" engines are boosted to 100"96" and 103" engines are boosted 110"10...