Cylinders & Pistons

158 products

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

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$1,322.99

Features & Benefits:- * Use with performance exhaust, air cleaner, S&S 585 bolt-in cams & EFI tune to produce massive horsepower gains. Tech Tips:- * Will Not Fit Twin Cooled Models. ...

CP CARRILLO PISTONS

$1,283.99

Features & Benefits:- * ID # 2621 * Bore = 3.937″ * Stroke = 2.835″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed f...

$1,249.99

MFR PART No: 92-2026 ROLLIES PART No: SS92-2026

CP CARRILLO PISTONS

$1,097.99

Features & Benefits:- * ID # 6932 * Bore = 3.937″ * Stroke = 4.375″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed ...

KB PISTONS

$700.99

Features & Benefits:- * Bore = 3.238″ * Stroke = 3.812″ * Fits Iron Head Sporty. * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal e...

$658.99

Cylinder Studs: Features & Benefits:- * 4140 Chrome Moly studs, oil quenched and tempered to 39-44 HRC * 180,000psi Tensile Strength * Rounded thread roots, rather than flat, improving fatigu...

KB PISTONS

$644.99

Features & Benefits:- * Bore = 3.503″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

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KB PISTONS

$644.99

Features & Benefits:- * Bore = 3.498″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

KB PISTONS

$596.99

* 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 piston-to-cylinder clearance Tech ...

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COLONY MACHINE

$314.99

Features & Benefits:- * High Tensile Aircraft Quality Studs. Proudly Made in the USA by Colony Machine ! MFR PART No: 2442-8 ROLLIES PART No: CM-2442-8

$3,887.99

* 117″ Standard Compression – Flat Top Pistons * Note: Crankcases must be bored to accept the larger 4-1/8″ bore cylinders * Compression Ratios: 85cc Stock Heads = 10.9:1 89cc S&S Heads = 10.5...

$3,725.99

Features & Benefits:- * Upgrades Milwaukee-Eight 114ci & non-CVO 117ci to 132ci * 4.320″ Bore * 4.500″ Stroke (4-1/2″) * Forged Pistons. * 11.1 Compression Ratio. * Wrinkle Black Finish. ...

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$3,483.99

Features & Benefits:- * Upgrades Twin Cam 96ci & 103ci to 110ci. * Cast Ductile Iron Liner; Increases Thermal Conductivity, Aids in Heat dissipation & Improves Ring Seal. * Includes 8....

$3,483.99

Features & Benefits:- * Upgrades Twin Cam 88ci to 100ci. * Cast Ductile Iron Liner; Increases Thermal Conductivity, Aids in Heat dissipation & Improves Ring Seal. * Includes 8.75cc pop up ...

$3,069.99

Features & Benefits:- * Includes 3cc Dome Forged Pistons. * Includes 0.045″ Head Gaskets. * 3.937″ Bore. * 4-3/8″ Stroke. * 10.5:1 Compression Ratio with Stock 85cc Heads. * 10.1:1 Compression...