07 yfz se 450 jetting

[jimmy3fan]

hey guys i have jetting issues with my 07 yfz i have a hmf bill balance exhaust and KN intake my bike cuts out at low end when its floored and it backfires all the time and shoots out a flame so i was wondering if anyone could help me out asap i greatly appreciate all the help

[250r4life]

that low end bog and cutting out is normal in the low end... the boysesen accelerator pump got rid of it for me, but people on here say that supposedly going with a smaller "leak jet" (not sure which one that is) will take care of it...

HMF's jetting reccomendations are pretty close... what is your current jetting, temp, and altitude?