Fuel & Air Screws

Why continue burning your fingers, attempting to adjust a rigid fuel screw? Or worse, deal with fuel screws that vibrate loose while riding. R&D introduces... More

Allows “No tools” tuning to obtain crisp, clean, positive off idle throttle response. CNC’d 7075 T-7 billet aluminum to precision tolerances. “EZ Dial” knob... More

Boyesen Power Wing Highlights: INCREASES horsepower and torque in 2-stroke, 4-stroke and 85cc engines AERODYNAMIC design maximizes velocity... More

If your are a new four stroke owner do yourself a favor and get one of these. It makes adjusting the fuel mixture a breeze and it's a must to have the fuel... More

If your are a new four stroke owner do yourself a favor and get one of these. It makes adjusting the fuel mixture a breeze and it's a must to have the fuel... More