I have a '00 400EX w/ K&N powerkit (has a Dynojet kit w/ it), FMF Powercore IV-sa, and I have drilled 11-1" holes in the airbox w/ filters in them. I am considering the WB/IMS 440 kit, WB Trail cam and springs, and WB Ign. box. I want to use the Trail cam to keep the torque for trail riding. Has anyone used the WB Trail cam? Or use the Ign. box w/ a Trail cam? Also, has anyone been able to get their 400 to idle during warm-up (w/ choke on)?

 

My 99 400 is stock and will not idle with the choke on. I have found that the best technique for me is to start with full choke and move the choke to 1/2 after about 30 seconds. This will usually allow it to idle until it is almost warm. Listen for the idle to slow down. This is a clue it is warming up and needs less choke.

 

how about changing the pilot jet? i've heard of running one size bigger (from a 38 to a 40) and have heard guys going as big as a 50 for a pilot. what size pilot can be ran in illinois--743 ft above sea level, average winter temperature about 28F, with humidity around 40%? airbox has 11-1" holes with small filters in them and am running a k&n w/ outerwear.