Author Topic: High idle still. (Read 3505 times)

yugyagz · « **on:** July 07, 2016, 06:42:53 PM »

I have a 39mm keihin. It has 170 main. 600 feet above sea level. Was missing idle adjusting screw so I purchased one and it still idles super high when I start quad. Doesn't matter where I have idle adjuster. Same idle. I've cleaned carb. Reset air screw. Seems that when I put I'm gear it drops down. After I run a bit it settles. Any help?

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yugyagz · « **Reply #1 on:** July 07, 2016, 06:45:17 PM »

Needle is middle clip forgot that. I just don't know what else to check. Maybe not even carb issue? I haven't done a leak down and know I need to.

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thesmith87250r · « **Reply #2 on:** July 07, 2016, 08:29:28 PM »

Is the cable adjusted so the slide sits as low as it can in the carb ?

yugyagz · « **Reply #3 on:** July 07, 2016, 08:57:13 PM »

I do not know. But will check. Thank you. How do I adjust it?

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yugyagz · « **Reply #4 on:** July 07, 2016, 09:01:17 PM »

Just adjusting the cable itself by the thumb

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thesmith87250r · « **Reply #5 on:** July 07, 2016, 10:28:29 PM »

Yep . Adjust it so there is a lil slack in the cable. An adjust the idle screw out .then start over adjusting the idle

broken1 · « **Reply #6 on:** July 08, 2016, 12:16:03 AM »

Your PWK probably has an adjuster in the top of the cap as well.

2ndmoto · « **Reply #7 on:** July 08, 2016, 02:14:44 AM »

Possible reasons for high idle. Air leak, improperly adjusted cable, too small of pilot jet

yugyagz · « **Reply #8 on:** July 08, 2016, 05:18:55 AM »

Are you guys talking air leak on carb itself?

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Skeans1 · « **Reply #9 on:** July 08, 2016, 10:17:36 AM »

Quote from: yugyagz;68633

Are you guys talking air leak on carb itself?

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Nope the motor

yugyagz · « **Reply #10 on:** July 08, 2016, 10:26:09 AM »

Okay so I'll do leak down test and go from there

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The_Steve_Man · « **Reply #11 on:** July 08, 2016, 11:04:45 AM »

You can turn your air screw out to see if the idle goes down. If it does, then your pilot is too small.

fearlessfred · « **Reply #12 on:** July 09, 2016, 05:14:44 PM »

Quote from: The_Steve_Man;68644

You can turn your air screw out to see if the idle goes down. If it does, then your pilot is too small.

Just the opposite , turning out allows for more air , you would be correct on a four stroke carb .

The_Steve_Man · « **Reply #13 on:** July 09, 2016, 11:28:16 PM »

Quote from: fearlessfred;68678

Just the opposite , turning out allows for more air , you would be correct on a four stroke carb .

Oops. You are correct. I knew what I meant but wrote it bassackwards.

yugyagz · « **Reply #14 on:** July 09, 2016, 11:32:18 PM »

So I adjusted throttle cable and helped a ton. Then it seemed that when I adjusted my air screw more towards closing it was a low idle. Then it shot up like crazy fast so I shut off and moved back to wherec it was. Think I'm good now. Still trying leak down test. The plug I bought won't stopped leaking in my exhaust. Gonna try a different one tomorrow

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