BOYESEN 1999 YZ250 BOY.RAD VALVE RAD-34E Underwear - Riding Face Foam - Three-layer Face

Face Foam - Three-layer Face Foam for sweat collection

- SHERCO 300 SEF-R 2020 2021 2022 2023

Exhaust Duration (Degrees at 1mm): 235

an avid motorsport enthusiast

250 2 x 4 / 4 x 4 (2001-2005)

BOYESEN 1999 YZ250 BOY.RAD VALVE RAD-34E Underwear - Riding Face Foam - Three-layer FaceBoyesen Rad Valve RAD 34E RAD34E 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