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HOME » 114 Monster Big Bore Kit











Revolution Performance 114" Monster Big Bore Kit

(Fits 1999-2006 88" Twin Cam style motorcycles)

$1,189.95


The Revolution Performance 114" Twin Cam Monster Big Bore Kit is the key component to build a devastating 114" 1999-2006 88" Twin Cam engine. The monster 114" 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 Cometic head and base gasket kit.

    114" 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 or Natural
  • 10.5:1 compression ratio dome-top piston kit(-2.8cc)
  • Cometic head and base gasket kit (.030 head / .020 base)
  • The 114" Monster Big Bore Kit requires additional engine modifications to install and benefit from our other products and services.

    Need more than a big bore kit? Click HERE for our complete 114" complete speed shop engine kit.


    Required Services:

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

  • 114" Monster CNC Cylinder Head Porting Package

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

    ***NOTE: Dyno chart represents 114" Monster Big Bore Kit, Velocity CNC ported heads, Feuling .630 cams, 55mm HPI throttle body, Bassani exhaust***

    ***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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