• 60% more power 

  • Straight-through exhaust flow 

  • Slide carburetor 

  • New push-button EZ-Start® 

  • TRX IPS crankshaft 

  • Knife edge connecting rod 

  • Long rod design 

  • Offset wrist pin 

  • Smooth tubular header 

  • Molded head protector 

  • Cast cylinder head 

  • High-Volume air filter 

  • O-ring exhaust gasket 

  • Super light piston and rod 

  • Square reciprocal geometry 

  • High performance ball bearings



TRX 2.5R Engine

The TRX 2.5R features the Powertune™ machined aluminum cooling head that promotes even heat distribution for stable engine temps and rock-solid tuning consistency. 

Other mods include a new sleeve for improved engine efficiency and better power.