97-98 YZ250 BOY.RAD.VALVE RAD-34D

Boyesen Rad Valve – RAD-34D / RAD34D

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 aluminum casting, no trimming or plastic inserts required

Yamaha

YZ250 1997-1998