ASK THE MXPERTS: 2003 HONDA CR125 TRICKS
I just bought a 2003 CR125 and am interested in what you recommend that I do to it.
Here is what we recommend for the 2003 CR125:
Jetting: We ran a 430 main, 40 pilot, 6DGY22-71 needle, the first clip and 1-1/4 turns on the air screw.
Pipe: Exhaust pipes were the most effective change that could be made to the 2003 powerband. We ran a Pro Circuit pipe.
Head: We ran a 2002 CR125 cylinder head on our 2003 model. This increases the compression. Be forewarned that you have to watch for pinging.
Forks: Loved the forks.
Shock. We ran 100mm of sag and the compression 8 out and the rebound on 12 out.