TRX400EX Sportrax 397cc Big Bore Cylinder Piston Ring Top End Kit 1999-2008

Enhance your TRX400EX Sportrax performance with this 397cc Big Bore Cylinder Piston Ring Top End Kit, designed for models from 1999 to 2008. This high-quality aftermarket part ensures a precise fit and reliable durability, perfect for restoring or boosting your ATV’s engine power. The kit includes all necessary components for a complete top-end rebuild, delivering improved compression and efficiency. Please note, this is an aftermarket replacement, not an OEM product. Ideal for riders seeking cost-effective engine upgrades without compromising on quality Compatibility may vary depending on the machine's serial number. Please verify fitment before purchase.