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HOME » 124 Monster Big Bore Kit

Revolution Performance 124" Bolt-On Big Bore Kit

(Fits 2017-PRESENT 107" Milwaukee 8 Harley Davidson motorcycles)


The Revolution Performance 124" Milwaukee 8 Bolt-On Big Bore Kit is the most reliable way to increase power and torque on your 2017-2018 Milwaukee 8 107" engine. Each 124" kit comes with our state of the art all aluminum NSC plated cylinders which last longer and run cooler than the OEM cylinders. The cylinders are matched with a premium forged piston kit and a complete Cometic gasket kit.

    124" Bolt-On Big Bore Kit comes with:

  • NEW 4.250" all aluminum Nickel Silicon Carbide (NSC) plated cylinders
  • Forged 11.1:1 compression ratio flat-top piston kit
  • Cometic head and base gasket kit
  • The 124" Bolt-On Big Bore Kit requires no other engine modifications to install but can benefit from our other products and services.

    Recommended Services:

  • 124" Milwaukee 8 Velocity CNC Cylinder Head Porting Package

    ***NOTE: Compression ratio is dependent on the cylinder heads combustion chamber volume***

For questions on our big bore kits, please contact our sales technicians directly at: 1-866-892-2109 M-F 8:30 A.M. - 5:00 P.M. CST.

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