M-8 124” Bolt-On Big Bore Kit
Plymouth, Wisconsin based Revolution Performance says its 124” M-8 Bolt-On Big Bore Kit is “the most reliable way to increase power and torque on the 2017-2018 M-8 107” engine,” for Tourers and Softails.
“Each 124” kit comes with our state of the art all aluminum 4.250” Nickel Silicon Carbide (NSC) plated cylinders, which last longer and run cooler than the conventionally iron lined OEM cylinders and are matched with a premium forged piston kit and a complete Cometic gasket kit.”
Subject to the cylinder head combustion chamber volume, the forged flat-top piston kit delivers a 10.4:1 compression ratio and the company says the kit installs without the need for any other engine modifications, “but can benefit from our other products and services such as our 124 inch M-8 Velocity CNC Cylinder Head Porting Package.”
Testing is said to have shown that the kit can produce as much as 28.4 percent gain in power and 17.8 percent gain in torque, and that the NSC plating process “forms an extremely hard barrier on the cylinder bore with exceptional wear resistant with excellent oil retention and a low coefficient of friction.
“Because our cylinder and piston are the same material, they expand at the same rate when exposed to heat - this means tighter, more precise tolerances can be used and the cylinder will run up to 40 degrees cooler.”