FULL CYLINDER KIT 300 ATHENA - INCLUDES: PISTON, GASKET AND CYLINDER The CRF300RX Enduro shares the engine with its 250 2021 brother, but features revised ignition and fueling mappings for a gradual and more manageable power delivery on the diversified funds typical of the enduro. Max power is at 11,300rpm and maximum torque is at 9,500rpm. The rev limiter is at 14,300rpm, in...

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...

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