Honda TRX Engines and Parts | Rebuild Kits

Get your TRX utility ATV back on the track, trail, or dunes with precision rebuilt components. Search by model displacement and generation to find exact-fit solutions for your machine.

We supply full rebuild solutions organized across all Honda TRX sport and utility ATV lines:

  • TRX 450R & 450ER Series: High-performance remanufactured 450cc long blocks, master top and bottom end rebuild kits, heavy-duty crankshafts, and Unicam cylinder heads
  • TRX 400EX & 400X Series: Complete air-cooled 400cc engine rebuild kits, cylinder assemblies, forged pistons, timing chains, and gasket sets
  • TRX 300 & 300EX Series: Legendary utility and sport 300 engine overhaul kits, cylinder heads, valves, crankshafts, and full seal kits
  • TRX 250EX/X & TRX 90 Youth Series: Direct-fit replacement engine parts, top end kits, gaskets, and maintenance rebuild packages

Fast Core Returns & 1-Year Warranty

Send us your core with our fast nationwide 2-way shipping. Every engine and part includes our 1-Year No-Fault Warranty. Built for dealers, shops, DIY mechanics, and riders.