Boyesen Engineering

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Search results for 'yamaha'

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RAD VALVES
$169.95
Out of stock
Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. Carb boot, Carb boot clamp and gasket provided. No modifications required. Learn More

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REED VALVE STUFFER KIT
$349.95
Yamaha 3 cylinder watercraft, are hard on reeds. To curb the appetite that these big engines have for reed petals, Boyesen has created a Reed Valve Stuffer Kit. Optimized reed valve stuffers together with Boyesen Pro Series reeds minimize turbulence and redirect flow to properly distribute the intake charge across the whole reed petal surface. Learn More

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INTAKE MANIFOLD
$329.95
Boyesen Intake Manifold allows optimized installation of aftermarket performance carbs. Available RAD Valves are recommended to complete the performance package.

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SUPERCOOLER KITS
$189.95
HEAT is killing your Yamaha 4-Stroke. These machines runs HARD and runs HOT – Boyesen's SuperCooler™ kit for the YZ450F uses a patented impeller design to protect vulnerable engine components. A 26% flow increase over stock lets you run cooler, run faster and moto longer. More flow means supercooled engine protection and maximum horsepower! Learn More

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SUPERCOOLER KITS
$189.95
HEAT is killing your Yamaha 4-Stroke. These machines runs HARD and runs HOT – Boyesen's SuperCooler™ kit for the YZ450F uses a patented impeller design to protect vulnerable engine components. A 26% flow increase over stock lets you run cooler, run faster and moto longer. More flow means supercooled engine protection and maximum horsepower! Learn More

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SUPERCOOLER KITS
$199.95
Out of stock
HEAT is killing your Yamaha 4-Stroke. These machines runs HARD and runs HOT – Boyesen's SuperCooler™ kit for the YZ250F uses a patented impeller design to protect vulnerable engine components. A 26% flow increase over stock lets you run cooler, run faster and moto longer. More flow means supercooled engine protection and maximum horsepower! Learn More

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SUPERCOOLER KITS
$189.95
HEAT is killing your Yamaha 4-Stroke. These machines runs HARD and runs HOT – Boyesen's SuperCooler™ kit for the YZ250F uses a patented impeller design to protect vulnerable engine components. A 26% flow increase over stock lets you run cooler, run faster and moto longer. More flow means supercooled engine protection and maximum horsepower! Learn More

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Supercooler - WPK-31AB
$199.95
HEAT is killing your Yamaha. These machines runs HARD and runs HOT – Boyesen's SuperCooler™ kit for the YZ125 uses a patented impeller design to protect vulnerable engine components. A 20% flow increase over stock lets you run cooler, run faster and moto longer. More flow means supercooled engine protection and maximum horsepower! Learn More

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Supercooler - WPK-31AM (Magnesium)
$199.95
HEAT is killing your Yamaha. These machines runs HARD and runs HOT – Boyesen's SuperCooler™ kit for the YZ125 uses a patented impeller design to protect vulnerable engine components. A 20% flow increase over stock lets you run cooler, run faster and moto longer. More flow means supercooled engine protection and maximum horsepower! Learn More

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Rad Valve - KTM 85 SX, Husqvarna TC 85
$169.95
Patented, one piece, cast aluminum Reed Block system that delivers guaranteed bolt on performance. Carb boot, Carb boot clamp and gasket provided. No modifications required. Learn More

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