jetting problem

[smiley-400ex]

my 06 450er with a sparks exhaust have jetting problem it runs great but will not idle pilot jet is not plugged if i turn the idle up all the way it will for a min any ideas please .

[TheLane]

Could be quite a few things

A. Slide adjustment is off
B. Fuel air mixture screw is not set right.
C. Float is not set right.

OR D. Its time for a top end rebuild. Idling only at high RPMS is a sign of low compression. IE: the piston isnt making enough compression to have enough of a vaccum at LOW Rpms to suck the fuel air mixture out of the carb. An easy way to tell this is to do a compression test ( which is very very easy if you dont know how to do it, you can find a tester at your local auto parts store for as low as 30 dollars)

There are other things that can cause this, however these are the most common.

[AtvKid4Eva]

did the bike idle before putting the sparks on?

[smiley-400ex]

ya it ran great i took it to someone to jet it and put the pipe on .he put a dail a jet in it and when i got it back it ran like **** so i orderd the sparks jet kit and put it in . it runs great but no idle

[smiley-400ex]

if i pull the choke out it runs better but will not idle any ideas .ive cleaned it out really good .