2005 crf250x
Rick Ramseys jetting chart: up to 1000ft and 59-80"F
40 pilot. Tried using a 42 but it was hard to start up (Often flooding)
152 main
stock jet needle 5th clip from top
2 turns out on pilot screw
Ap mod, I just used 2x number-4 metric o rings and set the pump screw at 2.75mm
Air box opened out to ccc spec
pink wire mod
exhaust diffuser removed
Everthing else is stock
95-98 ron unleaded
does not have as much bog of idle, I can be down low in third gear and just button the throttle open and instant response.(No hesitation)Im going to try a number 70 leak jet next time.The only drawback is the exhaust is a bit loud,but i can live with that. I am running 13-51 gearing because of the trails we ride, (Lots of steep hills and mountains) And im going to put the bike on the dyno and see if there have been any gains made at all.