Monster Big Bore Kits

When bigger isn’t big enough Revolution offers a Monster solution. Monster kits do require case boring, crankshaft services, and CNC porting for proper performance and reliability. Cam shaft recommendations are also available for your Monster build as well. We offer a host of other services and products to build the biggest American V-Twins available.

Parts are included in big bore kit price. Additional services are required.

The cases must be bored wider to accept the new cylinders, as well as a crankshaft balance to even out the added weight that will be added to the bottom end. Of course, head flow services and larger camshafts are highly recommended to gain the absolute most out of these kits.