Boyesen Engineering

Boyesen Engineering are renowned for their out of the box, bolt on power upgrades.

If your bike is not listed please call as many other applications are available

Boyesen RAD Valves

Boyesen RAD Valves are the most advanced air intake system that you can add to your bike.

The Rad Valve's seamless, one piece, precision cast alloy and aeroform surfaces ensure maximum flow velocity and instant throttle response.

Boyesen Pro Series Reeds

The unique Boyesen Carbon-Fibre top reed provides superior response, allowing the reeds to respond quickly and accurately to changes in engine pressure. The fibreglass bottom reed provides durability for increased life over traditional all carbon reeds. The Pro Series Reeds deliver the largest horsepower and torque gains any reed can offer.

Boyesen Power Reeds

Boyesen's patented dual-stage design incorporates a specially shaped top reed and ported bottom reed. The light weight top reed is designed for crisp throttle response at low RPMs. The stiffer bottom reed is ported to provide maximum airflow at higher RPMs.

Boyesen Ignition Covers

Add style and the factory look with a Boyesen Ignition Cover. Investment Cast Aluminium provides excellent heat dissipation and will not warp like stock covers. Super tough powder coated finish resists weathering and wear and tear. Asbestos free gasket included.

Boyesen Mini Bike Ignition Covers

Boyesen have introduced the mini bike ignition cover to fit XR/CRF50s, will also fit other mini bikes such as the XSport. Built using the same quality materials and finish as the rest of the Boyesen range.

Boyesen Clutch Covers

Add style and the factory look with a Boyesen Clutch Cover. Investment Cast Aluminium provides excellent heat dissipation and will not warp like stock covers. Super tough powder coated finish resists weathering and wear and tear. Asbestos free gasket included.

Boyesen Quickshot Accelerator Pump Cover

No bogging or hesitation. Boyesen have produced an all new accelerator pump cover to solve the bogging problem associated with 4-stroke Keihin FCR carburetors.

Boyesen Water Pump Cover

Boyesen Factory Racing water pump covers and impellers are design to increase water flow, reduce hydraulic friction and cavitation. Your bike can run as much as 30F cooler.