ok you can see what set up i have by my signiture i'm running a 155 dj main jet and needle on 3rd clip and mixture screw out 1 3\4


bike runs awesome in all gears and rpm ranges, i ran it for a good 15 mintures goin in each gear then i ran WOT for a good 5 seconds then hit the kill switch and pulled the clutch and coasted to a stop then checked the plug, the plug is brand new and there was like no colour to it, tip was a bit burnt but porselin part was white like brand new so it must be running lean still.....header pipe is pretty hot not glowing though ( burnt my pants on the header pipe)

what is the first place to start to look? needle or main jet? and the mixture screw is already in quite a bit, im not messing with the pilot jet because dynojet nor big gun says to change it....

any ideas why its running so lean???

 

oya i'm 900 feet above sea level and its cold out right now like zero degrees celcuis....



ANY insight would be greatly appreated i wanna get this thing going by tomorrow before we get a sh*t load of snow