hello.. I have a 2001 yz426f and i need help.
the bike pops hard on deccel, will not start without a "prime" (turn of throttle once) and backfires when trying to start.
both the hot start and cold start do not make a difference starting. does not idle smooth, and does not rev very smooth in neutral.. pops and backfires.
The bike runs good when its moving though! no bogging, but no backfires when decelling, just popping.
jets are all stock im pretty sure. Valves are in spec and I have a 2003 yz exh cam in.
screw 1 1/2 turns out
main jet- 162
pilot- stock (42?)
starter jet- stock
riding at sea level to 600ft
5-30 degrees Celsius (around 20 right now at roughly 50-70% humid)
Ive had a kx125, 230f, and a 150f and none had gas mileage this bad.. i kinda expected it but holy.. and the bike gets really hot.
I need help knowing what i should change on the bike.. i dont know if its lean or rich, and the fuel screw really makes no difference.
I know that the forum probably has a thread already but really cant find any info that i can use.. PLEASE HELP!
Edited by CalebVio, May 18, 2015 - 03:01 PM.