Introduction to the GRR
Royal Enfield has taken a significant step in the world of custom motorcycles by collaborating with Madrid-based bike builder XTR Pepo. The outcome is the GRR, a stunning supermono sportsbike derived from the popular Guerrilla 450. This unique machine was unveiled at the Wheels and Waves festival in Biarritz, a celebration of motorcycles and surf culture that showcases exciting custom builds each year.
Innovative Design and Features
Pepo Rosell, known for his expertise in single-cylinder engines, aimed to create a bike that is both lightweight and fast. With an impressive weight reduction, the GRR tips the scales at just 131kg, a fantastic drop from the stock Guerrilla’s 184kg. This has been achieved through the use of custom fibreglass fairings crafted in collaboration with Italian firm Futura 2000, as well as modifications to the frame and swingarm. The design also incorporates modern touches like inverted Showa forks and lighter Dymag wheels, enhancing both performance and agility.
Performance Upgrades
The GRR’s modifications extend to its powertrain and braking systems. Retaining the 452cc liquid-cooled engine, which produces a robust 39bhp, the bike features a larger airbox and a 45mm exhaust paired with a titanium silencer to amplify its sporty character. Additionally, the upgraded braking system boasts twin CNC machined calipers and larger, lightened discs, ensuring enhanced stopping power. With these enhancements, the GRR not only captivates the eye but may hint at Royal Enfield’s future aspirations for the 452cc engine platform.
