Fuel System

Boyesen Engineering has now released the NEW QuickStart. Hot engine starting is no longer a problem and is available for ALL Keihin FCR carbureted MX, Offroad and ATV models. The patented performance of the proven QuickShot system, now with adjustable...

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,...

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Lowthrottle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Lowthrottle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Low-throttle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Lowthrottle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Lowthrottle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Lowthrottle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Lowthrottle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

Dual stage reedsMinor change gives major H.P. improvementsFaster opening and closingGreater low-pressure (Lowthrottle) responseGreater velocityGreater flow areaLonger overall lifeNo engine damage if broken

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...