2001 300EX, Full WB exhaust, k&N filter, New 130 Main. Having serious problems with idle. idleing SUPER high. i thought the main wa for high rpm's. it should not effect the idle? Need to know what to, riding trip tomorrow.

NT

 

Well heres the simple fix TURN the idle screw and it will rev higher one way and less the other so turn it down and then go riding!

 

Yah, thanks for the smart-a$$ reply killer. Did that and nothing. Anyways, I found the problem. But, I have come across another. I am going to post it as a new thread.

NT

 

I wasnt trying to be a smart @$$ there are alot of stupid people on this site that wouldnt have know that.

 

Much love bro. No disrespect. I know there are few "less intelligent" people in this forum. I just took that damn carb off and cleaned it so many times. Anyways, there was some $hit in there from when I took it off the first time. I got it all cleaned out though. By the way, how is the R treating you. If I remember correctly, you were having problems with it. Hope all is good.

NT

 

Well my R is running GOOD now. I changed the neadle clip posision and went to a hotter plug and now it's running strong. Glad to here you figured out what was wrong with your 300ex , Zeebo.

 

N3C0T0 -

After your mods, you'll be running lean throughout all the carb circuits. You adjusted one of them, the main jet. Usually, with just a pipe/filter, you can get away without adjusting the needle (affects mid throttle). Finally, you have the low speed circuit. That's where the pilot jet and air/fuel mixture screw comes into play. (Note: the air/fuel mixture screw and the idle adjustment screw are two different things). Think of the air/fuel mixture screw as a fine adjustment for the pilot jet.

A machine that idles high (after mods) means that the low speed circuit is lean. I'm not sure where the 300ex's air/fuel mixture screw is located, but I have a pretty good guess. You'll probably find it under your carburator, right in front of the floatbowl. Turn this screw out in 1/2 turn increments until it idles normally.

It's not necessary to adjust the idle, so you'll want to return that to the position it was in - if you used that to correct (or hide) the problem.

If you don't adjust the air/fuel mixture screw, you'll find that the 300ex will backfire on deceleration (along with possible hard starting).

Hope this helps,
ogre