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Old December 4th, 2011   #11
slmjim
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Default Re: fast idle problem

My new '09 did the same thing from day 1. It would run up to 3,000 rpm or more during warmup, then drop down to normal. I decided to investigate & resolve myself mostly because I bought the bike 600 mi. from home. The adjustment is the SE Thermal Valve. It's not difficult, but you must pull the airbox to expose the throttle bodies.
The final adjustment I settled on was to adjust the SE Thermal Valve adjusting nut 1/4 turn CCW when looking down on it from the left side of the bike. It doesn't take much to make a significant difference in idle speed at partial warmup. After making the adjustment I'd suggest allowing the bike to cool overnight to achieve a truly cold test start. Allow the bike to idle up to operating temp before deciding whether or not to make any further adjustments.

Good Ridin'
slmjim & Z1BEBE
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Old December 6th, 2011   #12
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Default Re: fast idle problem

Quote:
Originally Posted by echo View Post
Awesome post. A true learning experience and an example for others to follow and learn from.

Mine does the same thing, extreme high idle at cold startup.

I will keep reading it over and over until I understand it!
+1 on that
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Old January 25th, 2015   #13
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Default Re: fast idle problem

My 2005 had this same problem for about a year. With this great write up, I also confirmed that I was not getting coolant through the SETWSV. By pushing air back through it seem to have fixed the problem. Time will tell if the tube will get blocked again.
Great work on the write up poppi. Thanks a bunch.
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Old January 26th, 2015   #14
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Default Re: fast idle problem

It's been almost six years now and the problem hasn't repeated itself. Hopefully, yours won't repeat it itself either.

Dale
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Old February 4th, 2015   #15
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Default Re: fast idle problem

I had a similar problem on my '03

When i pulled the throttle body out I found that the starter valves on cylinder 3 and 4 were both stuck open while 1 and 2 were closing correctly. Removed the offending starter valves using the service manual instructions (with a little difficulty but great care), cleaned them with sandpaper and blew some air into the voids. Applied a little engine oil to the starter valve piston and seated it, spreading the lube by inserting, twisting and removing the valve.

Re-assembled and it works like a dream. In addition to the high idle problem in the original post, it was taking forever for the revs to drop down after closing the throttle. Both problems have disappeared now.

Hope this is of use to someone.
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Old March 5th, 2016   #16
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Default Re: fast idle problem

Help!!! Coming home from, work tonight, my 04 started idling very fast, as in 4250. When I got home, it wouldn't slow down until I shut it off. Smells hot. Any ideas???
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Old March 5th, 2016   #17
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Default Re: fast idle problem

Time to replace the wax unit?
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Old March 5th, 2016   #18
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Default Re: fast idle problem

It's about time to replace the bike, but I'm planning on giving it to my son, so I've got to fix this. There's nothing in the Service Manual Troubleshooting guide, so I'm at a loss.
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Old March 5th, 2016   #19
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Default Re: fast idle problem

See what Paul, or others can contribute.
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Old March 6th, 2016   #20
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Default Re: fast idle problem

At first glance, sounds like the wax thermal unit. Mine was flaky when I bought it - fixed under warranty.

Sitting still, at cold start, it would idle normally, and idle down seemingly correctly. Once underway, when the cold surrounding air made everything under the tank cold, the idle would shoot up...somewhere around 4K or so. If I let it sit for a few minutes, time enough for the heat from the engine to warm everything under the tank again, it would idle normally. Rinse and repeat. These were my symptoms. What's yours doing?
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