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HOME » 124 Monster Big Bore Kit

Revolution Performance 124" Monster Big Bore Kit

(Fits 2007-2016 96" Twin Cam style motorcycles with 4.375" stroke crankshaft)


The Revolution Performance 124" Twin Cam Monster Big Bore Kit is the key component to build a devastatin 124" 2007-2016 96" Twin Cam engine. The monster 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 Cometic head and base gasket kit.

    124" Monster Big Bore Kit comes with:

  • NEW 4.250" all aluminum Nickel Silicon Carbide (NSC) plated cylinders in your choice of finish: All Black, Black Highlighted, Granite or Natural
  • 11.2:1 compression ratio flat-top piston kit
  • Cometic head and base gasket kit (.030 head gasket / .020 base gasket)
  • The 124" Monster Big Bore Kit requires additional engine modifications to install and benefit from our other products and services.

    Required Services:

  • Case bore service
  • Crank balance service
  • Recommended Services:

  • 124" Monster CNC Cylinder Head Porting Package

    ***NOTE: Compression ratio is calculated with an 86cc chamber***

    ***NOTE: Dyno chart represents 124" Bolt-On Big Bore Kit, Monster CNC ported heads, S&S .640 cams, 62mm HPI throttle body and D&D Boarzilla***

    ***Actual big bore kit products may vary from pictures shown above.***

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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