Gasket kit 400 Athena - included: cylinder and head

COMPLETE CYLINDER KIT. CRF 400 R D.92 - Displacement 413 cc - Bore for stroke 92 x 62,1mm - Compresison ratio 13 : 1

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.

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