RFX FXRS 57-40 99BU aluminum rear sprocket is designed for off-road motorcycles, providing lightweight strength and durability. Constructed from CNC-machined 7075 aerospace aluminum, it offers a strong, corrosion-resistant component.
The sprocket features strengthening gussets and chamfered weight-reducing cutouts to optimize performance and reduce weight. Mud clearing grooves are incorporated for longer sprocket life by preventing debris buildup. The 2-tone anodized and polished finish delivers a factory bike appearance.
This sprocket is suitable for KTM, Husqvarna, and Gas Gas models, enhancing drivetrain performance and longevity. Easy to install and designed for demanding riding conditions, it is an essential upgrade for riders seeking reliable, lightweight components that improve acceleration and handling.
Features:
Laser etched RFX logo
CNC machined from 7075 aerospace aluminum
Strengthening gussets
Chamfered weight-reducing cutouts
Mud clearing grooves for longer lasting sprocket life
