High idle after long hot ride. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 13 (permalink) Old 06-16-2008, 10:49 AM Thread Starter
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High idle after long hot ride.

Set idle at 1100 RPM in town with bike warmed up. Then after a prolonged ride at 60-80 mph in the desert the bike returns to idle at 1500 RPM. If I reset the idle back to 1100 while the bike is still hot it will be too low when I start it the next day. Is this normal?

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post #2 of 13 (permalink) Old 06-16-2008, 11:24 AM
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Yes my bike does the same. It seems to take the bike good time to really warm up. My bike is a 04, and does the same. After about 10 minutes of riding I have to reset the idle down again. Yes then the nest day or the nest time I starte it I will reset idle for restart. I have marked the knob with paint to for first start of day then turn it down as needed. Ride safe.

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post #3 of 13 (permalink) Old 06-16-2008, 11:37 AM
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I usually re-adjust the idle on mine once really warmed up too.


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post #4 of 13 (permalink) Old 06-16-2008, 02:14 PM
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Quote:
Originally Posted by sgsibob View Post
Set idle at 1100 RPM in town with bike warmed up. Then after a prolonged ride at 60-80 mph in the desert the bike returns to idle at 1500 RPM. If I reset the idle back to 1100 while the bike is still hot it will be too low when I start it the next day. Is this normal?
Nopey it's not normal, well it is if you need to clean the carbs. What it's doing is starting the flooding problem but may not be that bad to notice yet just the idle. Mine did that till I cleaned my carbs good.

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post #5 of 13 (permalink) Old 06-16-2008, 03:04 PM
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Quote:
Originally Posted by sgsibob View Post
Set idle at 1100 RPM in town with bike warmed up. Then after a prolonged ride at 60-80 mph in the desert the bike returns to idle at 1500 RPM. If I reset the idle back to 1100 while the bike is still hot it will be too low when I start it the next day. Is this normal?
Just thinking...... are you changing elevations much when this happens?


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post #6 of 13 (permalink) Old 06-16-2008, 04:06 PM
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I was having trouble getting mine to idle well until warmed up. I don't like changing the idle speed back and forth. After I coastered it, I have much less trouble. It will idle fine after a minute or two now.

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post #7 of 13 (permalink) Old 06-16-2008, 04:39 PM Thread Starter
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Re elevation changes, no, not a whole lot. It seems to be more related to heat. (The bike is not coastered) The first time I noticed it I started out at 2400 ft and about 90 degrees, dry heat, ended up at 4800 ft in the 80s, no problem. Later that day back to 2400 ft again but temperatures in 100s, and had the high idle. Last weekend I started out at 2400 ft and went over several 7,000 ft summits, ended up at 6,500 ft with no problem. Rode around at 6,500 ft to 8,000 ft and noticed a little decline in performance due to the elevation but no issues with idle speed. When I retraced my steps again I was running for about 80 miles in temperatures above 105, and had the high idle. So there's no correlation with anything but heat.

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post #8 of 13 (permalink) Old 06-16-2008, 05:52 PM
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I had the same problem and I did a good carb clean and it has not done it since. That's what I would reccomend. My problem was almost identical.
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post #9 of 13 (permalink) Old 06-16-2008, 06:35 PM
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Hmmm, my '03 idles a constant 1,100 to 1,200 regardless of weather.

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post #10 of 13 (permalink) Old 06-16-2008, 09:34 PM
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Quote:
Originally Posted by Vulcaneyez View Post
Hmmm, my '03 idles a constant 1,100 to 1,200 regardless of weather.
My 94 does too, once it's warmed up.

My RE does have a idle thats way high once it's fully warmed.
But we've not got it jetted properly yet. Still bit to rich.

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