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2003

ASK THE MXPERTS: What Are The Best 2003 Honda CR125 Set-Up Tricks?

ASK THE MXPERTS:  2003 HONDA CR125 TRICKS Dear MXA,    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 increa…

MXA’S SECRET JETTING SPECS, 2003 And Back

We can’t tell you how to jet your bike. It’s a big world out there (and we don’t know you all that well). However, we can tell you what jetting we run in the MXA test fleet. Take into account that we race in a Mediterranean climate, near sea level, within sight of palm trees and never far from a Double Latte. We also run fresh 92-octane gas, work on our bikes every week, clean the filters, change pistons and rings regularly, are alert to pinging and haven’t changed oil brands in over a decade. This is t…