asking a question for a friend....

[troutman561]

im asking this for my friend cause hes to stubborn to find out the problem.. well 1st let me give u an overveiw of his bike.. its an 04 400ex and it looks like it could be 10 years old, his fenders are cracked and flopping everywhere and its maybe been cleaned 5 times in over a year.. but anwyays a few times he ridden w/o and air filter.. lol i know incredibly stupid, but anyways he said he has to use his choke to start it every time(i have mine for a few months left and rarely use mine unless its 30 degrees) even when its hot, and his jetting is fine so thats not a prob, i think its a dirty carb cause the dumbass rode w/o the airfilter.. any other suggestions of what it could be???

[kd5sfq]

Our 400ex's were cold natured like that at first. They fouled plugs right and left trying to start them cold... A 42mm pilot jet seems to fix it.

[troutman561]

no no i meant he has to use it chock everytim, even when its hot out, i figured it may jsu tbe a dirty carb

[400exrider5]

have your friend clean his carb if that dosent work then go from there and try something else.

[RiderTRX400ex]

what kd5sfq said, up the pilot jet size to a 42 which should make it start a lot easier cold... and tell that meathead to clean the carb and run an air filter.