Wiseco Piston Kit 74.50mm 11:1 Compression Honda TRX300EX 1993-2008 4574M07450

If you're running a Honda TRX300EX and want to unlock genuine performance gains, upgrading to a higher-compression piston is one of the most direct ways to increase horsepower and throttle response. The Wiseco 11:1 compression piston kit replaces worn stock pistons with precision-engineered components that deliver measurable improvements in both trail riding and competitive racing. This complete kit includes rings and circlips, so you get everything needed for a proper rebuild without sourcing parts separately.

The high-silicon alloy construction provides the durability needed for sustained performance under load, whether you're pushing hard at the track or tackling technical terrain. Wiseco's precision engineering ensures a tight fit within your bore, eliminating excess clearance that can cause noise and power loss. At 74.50mm bore diameter with an 11:1 compression ratio, this kit is specifically matched to your TRX300EX engine for 1993–2008 model years.

• Bore diameter: 74.50mm
• Compression ratio: 11:1
• Material: High-silicon alloy
• Fitment: Honda TRX300EX 1993–2008
• Kit includes: Piston, rings, circlips
• Installation: Standard engine rebuild
• MPN: 4574M07450