Engine & Motor Parts

Upgrade the style and performance of your bike by switching out its stock hoses with Pro Circuit's Standard Radiator Hose Kit. Our radiator hose kits feature premium-grade silicone throughout, which can operate at higher temperatures and pressures than a stock rubber hose. The hoses...

Thermostrips Description: Overheating is the main reason your bike loses power and performance. Today's high performance race bikes are at the cutting edge of development and continue to push the limits of existing technology. Pro Circuit Thermostrips come in a package of three so...

Fits The Following Bikes: Kawasaki KX250F 2006-2014 Kawasaki KX450F 2006-2014 Screen Eliminator Kit Description: The wire inside a four stroke air filter cage is nonconducive to producing horsepower. This replacement kit is designed for Kawasaki race bikes and allows the screen to be removed...

Fits The Following Bikes: Kawasaki KX250F 2004-2005 Suzuki RM-Z250 2004-2006 Screen Eliminator Kit Description: The wire inside a four stroke air filter cage is nonconducive to producing horsepower. This replacement kit is designed for Kawasaki and Suzuki race bikes and allows the screen to...

Replace old or worn-out O-Rings for your Pro Circuit water pump cover. Replacement for part #WPK04250

Replacement Oil Filler Cap for Hinson Billetproof??Clutch Covers part #'s C355, C454, & C477. Manufactured from T-6 aircraft quality aluminum. Available for Japanese and KTM dirt bikes and ATVs.