weird bogging

[BlaineKaiser450]

During my last race my quad was bogging slightly on the starts. I normally start in 2nd gear. I did the same thing this time, but on the start it bogged for about 10 ft. My jetting is a 180 MJ, 48 pilot, needle on the middle clip. I have a full system and the airbox lid removed. It was about 45 degrees and that might have something to do with it. My start technique is rev it to 8000, and feather the clutch as i start. Can someone tell me why it was bogging on this start?

[BlaineKaiser450]

o and BTW it wasnt bogging at all during the race. just the start

[BlackTrx440ex]

happens to me since i put my exaust and jetted it and stuff to normally it only does it at the beginning when i ride too like when i first romp it , it cuts out then all the power is right back again

[bloodmoney23]

same happened to me b4 rebuild.

[New450r]

Mine dose it when it idels for a while or sits How dose your plug look.

[BlackTrx440ex]

i know my jetting is off cuz it pops when i let off the throttle.... iam gunna have my motor built soon tho by bcs and gunna have him jet it for me too

[pro-rider46]

maybe the track has a lot of bite, that seems the most probable