Cylinders & Pistons

162 products

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

$662.99

Features & Benefits:- * Bore = 3.457″ * Stroke = 3.969″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

KB PISTONS

$679.99

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 ...

KB PISTONS

$679.99

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

$645.99

Features & Benefits:- * Bore = 3.518″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter ...

KB PISTONS

$645.99

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...

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KB PISTONS

$645.99

Features & Benefits:- * Bore = 3.508″ * Stroke = 4.250″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

$726.99

* Top quality cast iron alloy Replacement Cylinders painted black and finished to 3-1/8″ 1340cc (80ci) standard size * Painted black to prevent rust. Recommended Additional Purchase * Part # KB297...

$730.99

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KB PISTONS

$628.99

Features & Benefits:- * Bore = 3.518″ * Stroke = 3.812″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

KB PISTONS

$628.99

Features & Benefits:- * Bore = 3.508″ * Stroke = 3.812″ * Hypereutectic Alloy is a cast 16% silicon content material. * Perfect for air cooled engines. * Low thermal expansion rate = tighter p...

FEULING

$338.99

* The strongest studs available! * Top engine builders demand quality fasteners! Secure your engine with complete confidence * Superior in strength and performance to any other cylinder stud kit o...

$313.99

Features & Benefits:- * Crafted from strong, billet 6061 T6 aluminum * Patent Pending Dual Spray Technology for uniform piston cooling * Revised spray locations for more effective cooling * An...

COLONY MACHINE

$260.99

* Set of 8 * Replaces OEM # 16837-85 Suggested Additional Purchase: Head Bolt Kit # CM-2011-8, CM-2012-8 or FE-3005

$4,675.99

Features & Benefits:- * 80ci with High Compression. * 4-1/4″ Stroke. * 3-1/2″ Bore. * 5.330″ Cylinder Length. * 9.0:1 Compression. * Includes Cylinders, Piston Kit, Head Bolts, Base Nuts &...

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136ci Stroker Big Bore Kit with Highlighted Fins - Black. Fits Milwaukee-Eight 2017up with S&S 4-5/8in. Stroker Flywheel. - S&S

$3,882.99

S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight® platform and open up a whole new level of perform...