kx250 idles way too fast

[Elementx665]

well when i cold start my 02 kx250 with the choke pulled it idle was to much way up in the rpms and you have to tap the kill switch like 3 times for it to idle right. i can get to to start without the choke but if its really cold i have to use the choke..and another thing mine is all stock and some of my friends say to keep it that way. cause i was going to buy a full procircuit pipe but they say to keep it stock. heres a pic of it

Edited March 23, 2010 by Elementx665

[hd1200]

My 2000 kx250 idles high almost every time i start it cold with the choke. It has a full pro circuit exhaust on it now. I just take off the choke immediately and it idles fine the rest of the day after that. My dad has a bone stock 00' kx250 and his does the exact same thing. It really freaked him out the first time he cold started it.Ive heard this is common with these bikes and is nothing to be worried about.

[crazy frenchMan]

my Rm250 does the same thing and i turn the choke off as soon as it starts it's all good it's a 2 stroke it will not hurt it.

rev the s#it out of a 4 stroke on start up some thing will let go

[Jeekinz]

My KX's do the same thing. I flip the choke on-off-on-off-on until the RPM's come down and leave the choke on for a few seconds. Hitting the kill switch may lead to a fouled plug.

[juliend]

My KX's do the same thing. I flip the choke on-off-on-off-on until the RPM's come down and leave the choke on for a few seconds. Hitting the kill switch may lead to a fouled plug.

Exactly. on/off with the choke until the idle levels out.

[Burrap]

i also have a kx250 and mine revs like crazy only when i use the choke, i hear jthere notorious for this. some solutions i have read but not tried yet are, 1. the bike is running too rich, or 2. a damaged/chipped reed. im almost positive im running too rich.

[foots]

My {super low hour} 04 just started doing the same thing. Pulled the carb and the pilot was partially plugged. Cleaned it and everything is normal as far as not screaming at 9k rpm

[Assassin5150]

my 99 kx250 does the same thing I just toggle the choke on and off like jeekinz.

[Fat Tony]

Same thing with my 01. Guys told me it was because it was too lean but I dont worry because it only does it on cold starts and I dont have any other issues that would lead me to believe that.

[djm]

My {super low hour} 04 just started doing the same thing. Pulled the carb and the pilot was partially plugged. Cleaned it and everything is normal as far as not screaming at 9k rpm

My '00 was doing the same thing as well. Cleaned out the carb (float bowl, jets) and all good now. No more screaming idle at startup.

[Burrap]

My '00 was doing the same thing as well. Cleaned out the carb (float bowl, jets) and all good now. No more screaming idle at startup.

that sounds like a good idea cause mine has not always done it, it just started doing it last fall.

[makKX250]

I wonder if the enrichment circuit just needs to be cleaned. If that was plugged or partially plugged it would run lean on start up.