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[QUOTE="bigred455, post: 670003, member: 19827"]
I definetly agree with canyncarvr JET MAIN FIRST AND GO DOWN FROM THEIR.  Example went over to avgas stock jetting 165 MAIN.
                                                                        PILOT 52
                                                                        NEEDLE NAFH 2ND POS.
                                                                        POWER JET I believe 50. 
Bike 03 kx250 when I switched over to avgas she was running lazy and dull down low and mid power was very dull also,   Full throttle she was breaking up and missing.I worked down to a 160 main the motor woke up everywhere of course up top ,but also way down low and mid, the motor came alive. I tried the needle in the 3rd clip just to see if I could get it to run rich(make sure I wasn't to lean in the 2nd pos) It did, the motor was missing down low to half. So I went to 2nd pos again to get a feel for it then moved to 1st and then 1.5 pos. I had no noticeable improvement going leaner on the needle pos I put it back to stock running strong. The pilot moved up to a 55 got lazy went down to a 50 felt real good went back to 52 stock felt just as good as the 50.       I also changed my porting recently, pretty aggressive,  the motor was blubbering and lazy all over I mean all over. Too make it short I jetted the same way as above ended up with a 150 main yes a 150 main, motor woke up EVERYWHERE!!! each step I took with the main. needle and pos is stock I did go down 1 on the pilot.  What I am saying is if you are rich all over and full throttle is also rich, start with the main it does wonders.canyncarvr  is 100% correct with my findings. :thumb:
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