.::NEW FOR 2012::. Patented, one-piece cast aluminum Reed Block system that delivers guaranteed bolt on performance. Gasket provided. No modifications required. This RAD Valve is recommeded for modified Banshee engines using a 38-40mm Mikuni Carburetor. Learn More

.::NEW FOR 2012::. Patented, one-piece cast aluminum Reed Block system that delivers guaranteed bolt on performance. Gasket provided. No modifications required. This RAD Valve is recommeded for modified Banshee engines using a 38-40mm Keihin Carburetor. Learn More

HEAT IS THE #1 ENEMY OF 4-STROKE ENGINE PERFORMANCE*
The Limited Edition Spectra Series Supercooler line comes in several different color options designed specifically to highlight your MX, Offroad, Mini, or ATV’s engine area. Boyesen is making a limited edition production run for the select models, so be the first and maybe the ONLY rider on your track to have the Limited Edition Spectra Series Supercooler! Learn More

HEAT IS THE #1 ENEMY OF 4-STROKE ENGINE PERFORMANCE*
The Limited Edition Spectra Series Supercooler line comes in several different color options designed specifically to highlight your MX, Offroad, Mini, or ATV’s engine area. Boyesen is making a limited edition production run for the select models, so be the first and maybe the ONLY rider on your track to have the Limited Edition Spectra Series Supercooler! Learn More

Boyesen SuperCooler Water Pump Cover and Impeller Kits are specifically designed to enhance the performance of your engine's cooling system. These high-flow, hydrodynamic water pump kits have been tested and designed to flow more coolant. By increasing the flow, the engine will run cooler at a more constant temperature. The Boyesen Supercooler can reduce engine temperatures by as much as ten degrees, as confirmed by tests at Team Kawasaki. How does the Supercooler achieve this? Hydrodynamics. Boyesen’s investment-cast aluminum water pump cover has bigger water inlets, a sculpted design, no casting seams, less restrictive corners, a more efficient impeller and less cavitation. Most MXA test riders feel that both the Suzuki RM-Z and Kawasaki KX-F offer marginal cooling efficiency. Learn More

Boyesen SuperCooler Water Pump Cover and Impeller Kits are specifically designed to enhance the performance of your engine's cooling system. These high-flow, hydrodynamic water pump kits have been tested and designed to flow more coolant. By increasing the flow, the engine will run cooler at a more constant temperature. The Boyesen Supercooler can reduce engine temperatures by as much as ten degrees, as confirmed by tests at Team Kawasaki. How does the Supercooler achieve this? Hydrodynamics. Boyesen’s investment-cast aluminum water pump cover has bigger water inlets, a sculpted design, no casting seams, less restrictive corners, a more efficient impeller and less cavitation. Most MXA test riders feel that both the Suzuki RM-Z and Kawasaki KX-F offer marginal cooling efficiency. Learn More

.::Fits H-D Magneti Marelli Injection Systems::.



The Boyesen Power X-Wing will increase power and torque by straightening airflow within the throttle body throat. With the enhanced flow of air from the inlet, the reduced air turbulance and increased velocity will provide more precise fuel control and optimum air/fuel delivery.




Simple bolt-on - gaskets provided.


Unconditionally guaranteed or your money back.

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The Boyesen SuperCooler water pump kit is an aluminum investment cast water pump cover and impeller combo; specifically designed to enhance the performance of your engines cooling system. Learn More

The Boyesen SuperCooler water pump kit is an aluminum investment cast water pump cover and impeller combo; specifically designed to enhance the performance of your engines cooling system. Learn More