Hi everyone, I have bought a stock 2004 TRX 400EX. I just buy the HMF Competition Full Exhaust Muffler & Jet Kit + Uni Filter.
This HMF Factory Jet Kit Includes Individual Keihin Hex 152, 160, 165, 170, 180, 190, 200 and 42 Pilot.
Appreciate your help to make the right choice on Main Jet.