TRX90

Honda TRX90 Big Bore Kits

Upgrade your Honda TRX90 ATV with big bore kits from TB Parts. The TRX90 is a popular youth and beginner ATV that shares engine architecture with the CRF and XR pit bike family, making it an easy candidate for bore-up upgrades.

TRX90 Big Bore Kit Options

TB Parts 143cc big bore kits for the Honda TRX90 include a bore-up cylinder, piston, rings, and gaskets. More displacement means more torque and better performance for trail riding, racing, and play riding. Compatible with 1993–2023 Honda TRX90 and TRX90X models.

TRX90 Engine Parts

Beyond the big bore kit, Hard Racing stocks performance camshafts and engine components for the TRX90. Contact our team at 704-799-2192 for help selecting the right combination of parts for your TRX90 build.