The PROX 01.4337.B Forged Piston Kit is a direct-interchange replacement designed for Kawasaki KX250F four-stroke motocross motorcycles with a standard-bore Nikasil cylinder. Built to provide reliable performance and a cost-effective alternative to OEM components, this kit supports proper engine rebuilding and dependable operation.
The piston kit includes the forged piston, piston rings, wrist pin, and retaining clips required for installation. Its 76.97 mm standard-bore piston and 13.5:1 compression ratio are matched to the original application, helping restore compression and engine performance when servicing worn or damaged top-end components.
Manufacturer: PROX. Brand: PROX. Manufacturer part number: 01.4337.B. Vendor part number: 19-4380B. Fitment includes the 2006, 2007, 2008, and 2009 Kawasaki KX250F. Verify the motorcycle year, model, bore specification, cylinder type, and compression requirements before installation. Professional installation and clearance checks are recommended to ensure proper piston-to-cylinder fit and reliable service.
Features:
- Cost-effective alternative to OEM pricing
- Directly interchanges with OEM piston components
- Forged piston designed for standard-bore Nikasil cylinders
- 76.97 mm standard-bore piston with a 13.5:1 compression ratio
- Complete kit includes piston, rings, wrist pin, and retaining clips
- Fits 2006-2009 Kawasaki KX250F models
Fitment:
2006 Kawasaki KX250F
2007 Kawasaki KX250F
2008 Kawasaki KX250F
2009 Kawasaki KX250F