Factory chain guide reinforcement, developed in collaboration with the racing department, protects against stones and bumps. CNC machined from ergal and andodized.

The inventor and worldwide patent holder of the first solid body plastic chain guide system. The Factory Edition #1 Rear Guide is a solid body design, with long lasting non replaceable wear pad. Called by Dirt Bike Magazine "The Superman of all chain guides" over the past 20 years. Exclusive Plastic formula “RMS” (Return Memory System) is so guide returns to center on impact.<br...

The only made in the USA factory tested chain slider used by top teams like Geico Honda MX. Improved slider shape to increase longevity in critical wear spots. TMD sliders include friction reducing additives to decrease chain drag. There is also UV protection additives to reduce color fade. Dampening pads are applied to reduce chain noise.

Front sprocket supersprox lighter and more resistant.

The Acerbis chain guide, replacing the original component, guarantees greater impact resistance thanks to the high-strength plastic material.

Rear chain guide standard - Suitable for 2002/2021 CRF250R / CRF250RX and 2002/2021 CRF450R / CRF450RX