Piston with reduced compression ratio, makes the bike softer and easier for Enduro. Approved by world enduro GP riders.

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...

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