Fuel System

Boyesen Engineering has now introduced the NEW QuickShot 3. This bolt-on performance accelerator pump cover eliminates bog, improves throttle response and offers hassle free leak jet circuit tuning. Currently available for ALL Keihin FCR carbureted MX,...

Boyesen Engineering has now introduced the NEW QuickShot 3. This bolt-on performance accelerator pump cover eliminates bog, improves throttle response and offers hassle free leak jet circuit tuning. Currently available for ALL Keihin FCR carbureted MX,...

Each Boyesen RAD Valve is unique - tailor made to that model, year and displacement.The intake charge is redirected for more even distribution to the intake portsConstant flow velocity is maintained for instant throttle response and more horsepowerOne...

Each Boyesen RAD Valve is unique - tailor made to that model, year and displacement.The intake charge is redirected for more even distribution to the intake portsConstant flow velocity is maintained for instant throttle response and more horsepowerOne...

Each Boyesen RAD Valve is unique - tailor made to that model, year and displacement.The intake charge is redirected for more even distribution to the intake portsConstant flow velocity is maintained for instant throttle response and more horsepowerOne...

Each Boyesen RAD Valve is unique - tailor made to that model, year and displacement.The intake charge is redirected for more even distribution to the intake portsConstant flow velocity is maintained for instant throttle response and more horsepowerOne...

Direct OE replacement fuel valvesDirect OE replacement molded fuel line providing hassle free installationFuel line meets C.A.R.B. and EPA fuel line permeation standards for motorcycles & ATVsViton rubber fuel resistant gasketsIncludes OE style fuel line...

Direct OE replacement fuel valvesDirect OE replacement molded fuel line providing hassle free installationFuel line meets C.A.R.B. and EPA fuel line permeation standards for motorcycles & ATVsViton rubber fuel resistant gasketsIncludes OE style fuel line...

Kits are intended for closed course racing onlyNBR rubber material is used on all O-rings and rubber gaskets. NBR has excellent resistance to the ethanol used in todayÆs fuelsComponents included in the kits are based off of US models and discretion must...

Kits are intended for closed course racing onlyNBR rubber material is used on all O-rings and rubber gaskets. NBR has excellent resistance to the ethanol used in todayÆs fuelsComponents included in the kits are based off of US models and discretion must...

INCREASES HORSEPOWER AND TORQUE IN 2-STROKE, 4-STROKE AND 85CC ENGINESAERODYNAMIC DESIGN MAXIMIZES VELOCITY GENERATION AND POWER GAINWING CHANNEL MINIMIZES DISTURBANCE AT NEEDLE JET WITHOUT AFFECTING JETTING CURVEPRECISION FIT ASSURES PERFECT ALIGNMENT...

Each Boyesen RAD Valve is unique - tailor made to that model, year and displacement.The intake charge is redirected for more even distribution to the intake portsConstant flow velocity is maintained for instant throttle response and more horsepowerOne...