- Jan 14, 2004
Does anyone have any suggestions on jetting for an 03 RM 250? I have a Pro-Circuit pipe/silencer, No Toil air filter, run 91 octane pump mixed w/Yamalube @32:1. I live in Arizona, about 1500' elevation, it's currently in the 60's and 70's daily. I went 1 step leaner on the pilot from a 48 to a 45, one position leaner on the clip, and I am way rich from stock on the main, from a 175 to a 185/190. The problem I have is the bike runs very lean. Most of the riding I do is on motorcross tracks that are 3rd and 4th gear midrange to full throttle(sometimes). Any info would help.