Wiseco Piston Kit 75.50mm 10.25:1 Compression for 1988-2000 Honda TRX300 PK1045

If you're running a TRX300 in demanding conditions—whether on the track or in the field—factory pistons won't cut it. The Wiseco PK1045 kit delivers the thermal stability and strength you need to maintain peak performance and engine longevity under sustained high RPM and heat stress. This is a complete, matched system engineered to work as one unit, eliminating guesswork and compatibility issues.

The high-silicone forged construction reduces thermal expansion while maximizing durability, a critical combination when you're pushing your quad to the limit. You get everything needed for a proper top-end rebuild—pistons, rings, wrist pins, circlips, and gaskets—all matched to Wiseco's exacting tolerances. Note that Wiseco pistons must be paired with Wiseco rings; mixing brands compromises the seal integrity this system is designed to deliver.

• Bore diameter: 75.50mm
• Compression ratio: 10.25:1
• Fits: 1988–2000 Honda TRX300
• Material: High-silicone forged
• Includes: Pistons, rings, pins, circlips, gasket
• Installation: Requires engine tear-down
• Ring pairing: Wiseco only
• Use: Racing and recreational