Cylinders & Pistons

162 products

Shop the range of aftermarket motorcycle engine products at Pro Class Custom Parts.

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$662.99

Features & Benefits:- * Bore=3.447″ * Stroke = 3.969″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter pis...

KB PISTONS

$645.99

Features & Benefits:- * Bore = 3.528″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter ...

COLONY MACHINE

$339.99

Features & Benefits:- * Custom Look. * Polished & Chrome Plated, 12 Point Dome Top Headbolts. * Replaces OEM 16480-92 and OEM 16478-85A Tech Tips:- * Will Not Fit M8 Engine’s. Proudly Mad...

$236.99

Features & Benefits:- * Sold as a Pair. Tech Tips:- * The SS940-0014 are the new rings that S&S are using now. Proudly Made in the USA by S&S Cycle !

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$2,055.99

Features & Benefits:- * This kit, when paired with an S&S Cam & exhaust totally changes the ride of the RE650 for the better. Transform your bike into a much more fun & exhilaratin...

$4,140.99

Features & Benefits:- * Upgrades Milwaukee-Eight 117ci CVO models to 132ci or all the way to 136ci with S&S stroker flywheel # SS320-0605 * 4.320″ Bore & 4.500″ Stroke * Forged Piston...

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$4,140.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci or non-CVO 117ci to 132ci or all the way to 136ci with S&S stroker flywheel # SS320-0605 * 4.320″ Bore & 4.500″ Stroke * Forged ...

$4,140.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci or non-CVO 117ci to 132ci or all the way to 136ci with S&S stroker flywheel # SS320-0605 * 4.320″ Bore & 4.500″ Stroke * Forged ...

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$4,140.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci or non-CVO 117ci to 132ci or all the way to 136ci with S&S stroker flywheel # SS320-0605 * 4.320″ Bore & 4.500″ Stroke * Forged ...

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$4,137.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci or non-CVO 117ci to 132ci or all the way to 136ci with S&S stroker flywheel # SS320-0605 * 4.320″ Bore & 4.500″ Stroke * Forged ...

KB PISTONS

$820.99

Features & Benefits:- * Bore = 3.518″ * Stroke = 4.250″ * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined * Best resistance to cracking in hi-co...

KB PISTONS

$820.99

Features & Benefits:- * Bore = 3.508″ * Stroke = 4.250″ * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined * Best resistance to cracking in hi-co...

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CYCLE PRO LLC

$200.99

* High quality, direct replacement piston ring kit * One Set Required Per Bike * Made in the USA * Cyl Dia = 3.750″ * Replaces OEM # 21949-07

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CYCLE PRO LLC

$200.99

* High quality, direct replacement piston ring kit * One Set Required Per Bike * Made in the USA * Cyl Dia = 3.750 +.010in. * Replaces OEM # 21955-07 MFR PART No: 28052M ROLLIES PART No: CPL-280...

KB PISTONS

$1,150.99

Features & Benefits:- * Super Duty KB Forged Coated Anodized Piston Kit. * Big bore 120″ piston kit for Milwaukee 8. * Factory 114″ and 117″ cylinders are used to bore to 4.125″. * No head m...