Cylinders & Pistons

160 products

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

$1,968.99

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...

$3,935.99

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...

$3,935.99

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 ...

$3,935.99

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 ...

$3,935.99

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 ...

$4,041.99

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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KB PISTONS

$809.99

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...

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KB PISTONS

$809.99

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 = 3.750in. * Replaces OEM # 21949-07 MFR PART No: 28050M ROLLIES PART No: CPL-28050M

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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

$1,130.99

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...

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KB PISTONS

$865.99

Features & Benefits:- * Bore = 3.885″ * Stroke = 4.375″ * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined. * Best resistance to cracking in hi-c...

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KB PISTONS

$865.99

Features & Benefits:- * Bore = 3.875″ * Stroke = 4.375″ * Flat Top with slight hollow Dome. * Forged 4032 Alloy is an 11% silicon alloy that is formed in a forging press then fully machined. *...

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KB PISTONS

$730.99

Features & Benefits:- * Bore = 3.218″ * Stroke = 3.812″ * Fits Iron Head Sporty. * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal e...

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KB PISTONS

$670.99

Features & Benefits:- * Bore = 3.498″ * Stroke = 3.812″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...