all i know is that i have a K&N, the dynojet needle down one notch, a 155 main jet, and a supertrapp IDS2 silencer with 9 or 12 disks and it starts immediatly in below freezing temp. I put the choke on just to start it, then back it right down to half choke, then 5 seconds later no choke. It runs awsome. This is with out the 440 piston or the lectron carb. I have yet to have the time to put them in.
~2001 Yellow 400ex, K&N filter with Pre-filter, POLISHED Supertrapp IDS2 silencer, 20" rear Holeshots tires, Braking brake pads, Black Shockers Shockcovers, Renthal 400ex bend bars w/ oury grips, Pro Design tether kill switch, JE 440 big bore 10.5-1 piston, Dyno Jet Stage 2 kit, Removed air box lid, Duncan Racing aluminum nerfs, AC Racing full chassis skid plate, Race cut plastic, AC Racing mudscreen bumper, and a 42 pilot jet and removed choke.
*SOLD*