The PROX 01.1320.A1 Piston Kit is a direct-interchange replacement designed for select Honda and Husqvarna two-stroke motorcycles. This standard-size, 66.35 mm piston kit features a molycoated piston engineered for reliable performance in Nikasil-plated cylinders. It provides a practical alternative to OEM pricing while maintaining the fit and function needed for dependable engine service.
Each PROX piston kit includes the piston, piston rings, wrist pin, and retaining clips for a complete installation. The matched components help simplify rebuilding and support consistent operation when replacing worn or damaged internal engine parts. Verify cylinder condition and manufacturer service specifications before installation to ensure proper clearance and fit.
Fitment includes the 1997–2001 Honda CR250R and the 1999–2003 Husqvarna WR 250. The manufacturer part number is PROX 01.1320.A1, and the vendor part number is 19-4430B. This kit is intended for standard-bore applications and should be confirmed against the motorcycle model year, cylinder type, and existing piston specifications before purchase.
Features:
- Cost-effective alternative to OEM piston kits
- Direct interchange with applicable OEM components
- Standard 66.35 mm piston for compatible applications
- Molycoated piston designed for Nikasil-plated cylinders
- Complete kit includes piston, rings, wrist pin, and retaining clips
- Fits 1997–2001 Honda CR250R and 1999–2003 Husqvarna WR 250
- Brand: PROX
- Manufacturer part number: 01.1320.A1
- Vendor part number: 19-4430B
Fitment:
1997 Honda CR250R
1998 Honda CR250R
1998 Husqvarna CR250
1998 Husqvarna WR 250
1998 Suzuki RM250
1999 Honda CR250R
1999 Husqvarna CR250
1999 Husqvarna WR 250
2000 Honda CR250R
2000 Husqvarna CR250
2000 Husqvarna WR 250
2001 Honda CR250R
2001 Husqvarna CR250
2001 Husqvarna WR 250
2002 Husqvarna CR250
2002 Husqvarna WR 250
2003 Husqvarna CR250
2003 Husqvarna WR 250
2004 Husqvarna CR250
2004 Husqvarna WR 250
2005 Husqvarna CR250
2005 Husqvarna WR 250
2006 Husqvarna CR250
2006 Husqvarna WR 250
2007 Husqvarna WR 250
2008 Husqvarna WR 250
2009 Husqvarna WR 250
2010 Husqvarna WR 250
2011 Husqvarna WR 250
2012 Husqvarna WR 250
2013 Husqvarna WR 250