400ex problem

[mjd400ex]

my 400ex will not start it turns over and backfires. it has good spark/gas. any idea?

[hornetgod13]

Have you done anything recently to the quad? Exhaust or intake modifications?

[mjd400ex]

know work done lately,ran good last week,just wont start

[monte433]

Mines doing the same thing since it has gotten real cold out, if I turn the heat on in the garage and wait a half hour it will fire right up.

[Honda#4]

whats the jetting at?
Is there fuel going to the carb?
Is the air filter plugged?
Can it idle at all?
Is there spark?

[allstock]

its probably just because its cold out. i just rode mine today and it was a pain to start

[blasterandy]

do u have a 42 pilot. That will make it easier to start i remember mine i had the stock 38 pilot in it and when it went down to about 65 deg. it was a pain to start can't imagine how hard it would be to start without it. now its normally around 39-45deg. here

[Honda#4]

Yea put in a 42 pilot and you won't have any problems, I have my bike jetted for 15 and below weather and it takes off like a charm.