Idling high when engine is hot - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 03-02-2016, 07:05 PM Thread Starter
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Idling high when engine is hot

I just recently bought a '95 Vulcan 750. It has around 18,000 miles. It starts up fine and idles fine in the beginning, around 1500 rpm. When I ride it for about 10 to 15 minutes, and come to a stop, it idles a little faster, but not bad, around 2000 rpm.

When I ride long distances and come to a stop, the idle is stuck at around 3000 rpm, and I have to let out the clutch in low gear to get it to drop down to 2000.

Is there an adjustment on the motor where I can adjust the idle down when it's hot, or do you have any recommendations?

Thanks for the help.
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post #2 of 5 (permalink) Old 03-02-2016, 07:47 PM
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Originally Posted by TexasVulcan750 View Post

Is there an adjustment on the motor where I can adjust the idle down when it's hot, or do you have any recommendations?

Thanks for the help.
There is a thumb adjust shaped like a "gear" on the left side of the carb assembly. If yours is different, then just ignore these photos:
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post #3 of 5 (permalink) Old 03-02-2016, 07:48 PM
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Best bet is to download the owner's manual and the repair manual, links are on the site. Also read the Vulcan Verses here.

Idle is supposed to be around 1050-1100rpm, hot, not more than 1100 except when using the choke.

Black adjustment knob is beside the left carb, if it's stuck, don't force it.

Could possibly have an air leak and/or throttle cables binding (routed wrong).

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__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #4 of 5 (permalink) Old 03-02-2016, 07:49 PM
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Pics are correct.
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2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #5 of 5 (permalink) Old 03-03-2016, 01:00 PM
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Check the "choke" plunger on the carb for leaks.
ALSO: the idle adjust can be flaky. sometimes going past the adjust point and returning to a good position works. Slight adjustments on the knob will cause it to "drift". look at the other end of the adjustment cable and you will understand what I meant by that. also clean the end of the cable and "adjuster" on the carb.

Use Seafoam...mine had this issue and Seafoam took care of it.
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