139″ Milwaukee 8 Monster Big Bore Kit – Black

From: Revolution Performance
SKU: 201-613W


– Fits 2017- current 107″ Milwaukee 8 motorcycles
– Aerospace-grade all-aluminum cylinder with Nickel-Silicon-Carbide (NSC) electroplated bore
– No sleeving allows for larger bore sizes
– NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan
– Monster big bore kits will require case boring. Additional upgraded services recommended.
– Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for SNC cylinders and a head/base gasket set
– Replacement gasket sets available separately
– Upgraded cylinder studs and head bolts recommended
– Made in the U.S.A.

1 in stock

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SKU: 201-613W Categories: , ,


Color/Finish: Black
Bore Size: 4.500″
Displacement: 139″
Stroke Length: 4 3/8″
Compression Ratio: 11.2:1 with 88 cc heads