BOYESEN 97-98 YZ250 BOY.RAD.VALVE RAD-34D Header 415 Chain is best suited

415 Chain is best suited for bikes up to 50cc

S (47CM) M (52CM) L (56CM) XL (61CM) 2XL (64CM)

- GAS GAS EC 300 GP 2018 2019 2020

Each Track Pack contains 54 pieces of the hardware riders need and replace most often

BOYESEN 97-98 YZ250 BOY.RAD.VALVE RAD-34D Header 415 Chain is best suitedBoyesen 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