SAME AS RAD-12E, BOYESEN RAD VALVE 99 KX250, BLOCK RAD-12D

Boyesen Rad Valve - RAD-12D / RAD12D

• Now delivered with carbon fiber reeds for even greater performance gains.


• Maintains flow velocity through the valve and redirects intake charge for more even distribution to the intake ports.


• Sharper, quicker throttle response.


• Added torque improves performance on hills, through corners, and over technical jumps.


• Increases horsepower in low-, middle-, and especially the top-end ranges.


• One-piece aluminium casting, no trimming or plastic inserts required.

Compatible with Kawasaki:

• KX250 1999