High idle when ran hard.

[slowslug]

I have a 2004 stock blaster. it runs great. When you first start it idles perfect as you ride it for about 30 min pretty hard the idle gets very high. Why is this is there a simple if? new to 2stroke so could use some help.

Thanks

 

[super noober]

there must be a airleak someplace, u need to do a leak down test to find out where before u melt your piston.

 

[dbowhntr]

It's going lean on the pilot. Try turning the air screw in a quarter of a turn when you get the high idle. Repeat if necessary. Is it stock?

 

[Surfrjag]

like noob said.. check for airleak first. then check to see if your slide is sticking or the cable is getting bound up and pulling on the slide keeping it open. now is a good time to do a leakdown test though...

 

[mud runner]

your either running it too lean or there is some trash in the carb

 

[OConnor Racing]

Do a leak down and if all is well, pop a 35 pilot jet in with the air screw turned out 1.5 turns. I'm assuming you have a stock carb.

 

[dbowhntr]

As they warm up they lean out. No way around it . What you are dealing is wetting of the intake. As it warms up the charge starts to atomize and it leans out.. Just adjust for it if you have no leak like ken said. Less than a turn out go for a bigger pilot 35

 

[slowslug]

Thanks guys. I'll start with the cable and work my way down. Is there a pic some where on this forum of what screw if the idle and with screw is the mixture? i only see 1 screw on mine and my local dealer told me idle has a spring on it but mine has no screw with a spring. So im confused please help.

 

[Larry's Shee]

Straight slot on left side, towards air box side. Should be spring, not really visable. Check the download manual if you don't have a Clymers. Or maybe check JLSparky's carb vidieo.