Dude I never have starting problems. I live in Michigan, its like 0 degrees out, with a wind chill of -10, and my 400 still starts.
Red don't choke it. your floooding the thing. Go your bike, turn everything in the on position, give it a couple squirts of gas with the thumb throttle. Start the bike, keep her running by bliping the thumb throttle or holding the rpms at a steady speed where it doesn't die. Do that for a minute, than slowly let off the gas, if it feels like its gonna die, or is idling very low, give it a few throttle blips, reach onto the side of your carb and turn your idle up, make it idle fast. than get off and let it warm up.
Or even just turn the idle up a couple turns before you even try and start it. And of course once its warmed up you can turn the idle down.
440, Ross 11.5:1 piston, Web cam 479 grind, race port & polish, oversized valves, hardened rockers, CRF450 cam chain, 39mm FCR carb, lightened Flywheel, Stock clutch, WB CDI box, K&N filter , WhiteBrothers E-Series full exhaust, Sidewinder Chain, 15/36 gearing, open airbox, LSR Axcaliber +3.5 axle, Houser Racing +2 a-arms, Elka triple rate, fully adjustable front shocks, +1.25 Houser swingarm, Tag Metals X5 bars, Arens +1 steering stem, Muscle steering dampener, Stainless Steel brakelines, HeatSeeker temp. guage, Pro Design kill switch, DG Pro Series nerfs, 8 run Hauler paddles. ~~http://www.sounddomain.com/id/trick440ex~~