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I have a 99' 1100 custom. I runs great through town and short trips. After cruising at highway speeds for twenty miles or so, the idle speed is unusually high. It almost sounds like a lean condition. Any one else have this problem?
 

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I have a 99' 1100 custom. I runs great through town and short trips. After cruising at highway speeds for twenty miles or so, the idle speed is unusually high. It almost sounds like a lean condition. Any one else have this problem?
I don't have this problem, but it also sounds like you need to synchronize the carburetors and open up your pms some. Out of synch carbs and a lean condition can cause a sticky ideal. Take a look at your plugs, that will tell you if you have a lean condition. The plugs need to be a tan/gray color.

This link will help you read your plugs.
http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

Here is a picture of the synchronizer screw (the one on the left, black knob is for the ideal). Use a 7mm wrench to turn it and use a manometer hooked up to both carburetors to synchronize both carburetors.

 
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