Boyesen Power Reed Dualstage Yamaha Tdr125, Tzr125 91-4 Rocs Pro Junior Fit: S/M-L/XL - 134-159cm

Junior Fit: S/M-L/XL - 134-159cm - 4ft5 -5ft3

limiting rotation to 90 degrees and preventing damage from excessive movement

Extended Wear™ Interior

Lightweight ECE 1260g and DOT 1360g for a size medium

RFX Pro Series Elite Rear Sprocket Yamaha YZ125-250 YZF400 82-98 (Blue) Various Sizes

Boyesen Power Reed Dualstage Yamaha Tdr125, Tzr125 91-4 Rocs Pro Junior Fit: S/M-L/XL - 134-159cmOne reed petal is NOT enough! Boyesen's revolutionary dual stage reed design delivers more usable power than stock. Stock single stage reeds operate most effectively within a relatively narrow RPM range and are limited because of the single stage design. Boyesen's one soft reed on top of one firm flow through reed gives you a wide range of intake control, plus increased intake velocity. Your original reeds can't possibly duplicate that performance.