its probably your float sticking. it wouldnt have anything to do with your b/o kit. take off your bowl and spray it out with brake parts cleaner(or carb cleaner, its practically the same thing) and see if it helps.
'07 450ER:
white brothers xc bumper, prm swinger skid, jetted, baffle removed
'98 Yamaha Blaster:
Airsal firebreather 240 kit, Vitos 3mm stroker crank, Project blaster aluminum airbox, Project blaster intake, Keihin 35mm airstriker carb, Vitos timing degree key, Boyeson pro series reeds, F7 pipe and silencer, Uni air filter, Durablue +2 axle (stock now i broke it), Kenda Klaw rear tires, Douglas .190 rear wheels (now stock i bent them), oil injection block off kit, EBC heavy duty clutch kit, 13/38 gearing, billet clutch basket, lightened flywheel, Renthal works chain, Fly handlebars, Hellbound +3 swinger, nissin hydro brake kit, banshee front shocks (stock now i bent them) , works quadstar rear shock w/rezzie, DG National front bumper
coming soon:
Maier race cut fenders
Elka/Leager a arm and shock kit
DG national series grab bar