A surprising project has been completed by Charles from mxRevival and Riley at BRC Racing Canada. They have managed to transform a 250cc Gas Gas motocross bike into a massive MC500 using BRC racing’s 500cc drop-in engine kits. In addition to doubling the engine displacement, the BRC kit also allowed them to keep a counter-balance and exhaust valve-equipped engine and add electric start to the previously kick-only model. The finished product, named “HELFYRE,” is truly remarkable. Here’s a closer look at the project.

One of the remarkable features of this conversion is the size of the engine. It takes up every bit of space available in the Gas Gas chassis. To complement the increased power, the bike’s suspension, brakes, and drive were upgraded. The air-forks were replaced with Yamaha KYB/SSS components by AHM Factory Services, improving the overall performance. Dirt Tricks provided their black zinc’d rotors and their “Elite Kit” consisting of a chain and front/rear sprockets to handle the increased power.

DeCal Works provided a custom seat cover and unique decal for FMF pipes. They also created two different sets of plastics and graphics for the bike, including one designed to entice Justin Barcia to ride the bike. The project was finished off with various attention to detail, resulting in a $35,000 dirt bike.

The full HELFYRE reveal can be seen on mXrevival’s YouTube video, and an upcoming article on HELFYRE will be featured in Dirt Bike Magazine.

Interested readers are encouraged to subscribe to Dirt Bike Magazine for a chance to win HELFYRE. Good luck!

-Charles // mXrevival