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Screwy Idle

  • Thread starter Thread starter ScottieGS700E
  • Start date Start date
S

ScottieGS700E

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My bike idled low so I turned up the idle screw on the carb. If I turn up the idle screw to where I want it, the bike idles great until I crack the throttle. Then all of a sudden when the tack comes down it idles at 3 grand for a while, and after a couple of minutes comes back down to idle. I can also get it to come back down to idle if I put a little bit of load on it with the clutch. I can turn the idle screw back down just a little bit, but it idles too low and it occationally stalls. Anyone know what my problem might be?
 
Lean

Lean

Well, it doesn't sound like the throttle cable is the problem so I think you're running really lean. Has this been occurring for awhile or did it start all at once?
 
I just bought the bike and I had to; clean the tank, replace the petcock, and clean the carbs to get it running...
 
The same thing started happening with my GS700 about ten years ago. It took me eight years to figure out what it was (because I found this website). In my case, I had the exact same symptoms, and it was due to vacuum leaks caused by the intake boot O-rings deteriorating.

They were a real pain to change. The phillips head screws wouldn't come out, and there isn't room to get an impact in there with the stock, non- removable airbox in place.

I ended up pulling the engine, using an impact to extract the phillips screws, then replaced them with Allen head screws before reinstalling.

The bike ran and idled much better after I did that.
 
wow.. thank you.. i couldn't ask for more, i love this website. where exactly is the "intake boot O-rings"? inside the rubber boot that connects the airbox to the carbs? doesn't the rubber just seal itself?
 
The intake O-Rings are part #24 on this schematic, and are $1.19 each from Bikebandit.com. While you're at it, check the rubber boots themselves for cracks. If they have any cracks, or are no longer soft and pliable, replace them as well.

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