Revolution Performance LLC Monster Big Bore Cylinder Kit for Harley Evolution Big Twin 1984-1999 - 109" Black with Highlighted Fins

Product type: Big Bore Kits

SKU : 0931-1064

Regular price $1,455.95 USD

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Cylinder Kit - Monster Big Bore - 109" - Black w/Highlighted Fins - Evolution Big Twin '84-'99 Upgrade your Harley Evolution Big...

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Cylinder Kit - Monster Big Bore - 109" - Black w/Highlighted Fins - Evolution Big Twin '84-'99

Upgrade your Harley Evolution Big Twin engine with the Revolution Performance LLC RP201-216W Monster Big Bore Cylinder Kit, designed for models from 1984 to 1999. Crafted from aerospace-grade all-aluminum, these cylinders feature nickel-silicon-carbide (NSC) electroplated bores that eliminate the need for sleeving, allowing for larger bore sizes and maximized displacement. The NSC plating reduces friction, leading to increased horsepower, lower engine temperatures, and an extended engine lifespan, making this kit ideal for high-performance applications. The kit includes a pair of all-aluminum NSC-coated bore cylinders, custom forged pistons with high-tension rings specifically designed for NSC cylinders, wrist pins, circlips, and a head/base gasket set, providing a comprehensive upgrade package. Made in the USA, these cylinders require case boring, which is not recommended on OEM cases from 1995 or earlier, and some installations may need a 4-5/8 inch stroke crank for optimal fit. To ensure durability and proper assembly, upgraded cylinder studs and head bolts are recommended. Replacement gasket sets and piston kits are available separately, offering flexibility for future maintenance or upgrades. This kit’s durable construction and performance enhancements make it a popular choice for motorcycle enthusiasts seeking reliable, high-performance engine components that improve power output and longevity.

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