Cylinders & Pistons - M8

31 products

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

$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...

$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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CP CARRILLO PISTONS

$1,311.99

Features & Benefits:- * ID # 12873 * Bore = 4.310″ * Stroke = 4.500″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed...

CP CARRILLO PISTONS

$1,311.99

Features & Benefits:- * ID # 14235 * Bore = 4.250″ * Stroke = 4.375″ * Steel gas nitride coated top ring * Ductile iron Napier 2nd ring * Three piece flex vent oil ring * X-forging for lighte...

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CP CARRILLO PISTONS

$1,311.99

Features & Benefits:- * ID # 12873 * Bore = 4.310″ * Stroke = 4.500″ * Fully CNC machined * Balanced to +/- 1 gram * Double forced pin oilers * Forged from high strength 2618 alloy * Designed...

CP CARRILLO PISTONS

$821.99

Features & Benefits:- * ID # 14208 * Bore = 4.250″ * Stroke = 4.375″ * Steel gas nitride coated top ring * Ductile iron Napier 2nd ring * Three piece flex vent oil ring * X-forging for lighte...

$4,018.99

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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$4,018.99

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 ...

$4,018.99

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 ...

$4,018.99

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 ...

$4,018.99

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

$1,083.99

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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CYCLE PRO LLC

$205.99

4.016″ Bore x 4.500″ Stroke * High quality, direct replacement piston ring kit * One Set Required Per Bike * Sold as a Pair. * Made in the USA * Replaces OEM # 22000061 MFR PART No: 28076M ROLLI...

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CYCLE PRO LLC

$205.99

3.937″ Bore x 4.375″ Stroke * High quality, direct replacement piston ring kit * One Set Required Per Bike * Sold as a Pair. * Made in the USA * Replaces OEM # 22000060 MFR PART No: 28070M ROLLI...

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

$3,906.99

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...