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Old 08-24-2015, 10:21 PM   #1
NemesisX's Avatar
Join Date: Mar 2012
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Posts: 5

Experience: 4-8 months

2009 GS500F

Idle issue

I have a 2009 GS500F.

When I bought the bike 2 months ago the RPMs would get stuck around 4-5k. If I feathered the clutch it would drag it down and stay down. There was no pattern, it was inconsistent.

Starting this past weekend, I was getting stumbles and surges in the mid-high RPMs, and whenever I held the clutched in and closed the throttle, RPMs would drop to 800-1000 and eventually die. I thought it was a battery issue, but, I got a new battery, filled it, trickle charged it. Didn't ride it until today.

Today, right off the bat from a cold start, it idles low and dies. I apply some choke, but as soon as open the choke it dies. I adjusted the idle screw to get it to sit at 1500, but after warming up it was idling high at 4-5k again. As a new rider, having to feather the clutch on a second to first downshift while braking without stalling out or lurching forward when coming to a dead stop, is not enjoyable. And probably distracting.

I don't know what the it could be. When I bought the bike, the guy suggested I either run seafoam or fuel system cleaner through it, and/or clean the carbs. He believed the "carb float slide" was dirty/gummed up. I never did.

Is this truly carb issue? I have never, ever, ever dealt with carburetors in my life before. I know it's not anything electrical, and I know it's not the throttle or return cables.

Sorry for the length, but carburetors are a foreign language to me. I have a shop manual and I'm mechanically proficient, so I can learn. But I want to make sure the symptoms match up with a carb issue before I go rebuilding it. This thing needs to get fixed though. I'll be damned if my bike isn't working when Fall rolls around.

Last edited by NemesisX; 08-24-2015 at 10:23 PM.
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Old 08-25-2015, 07:23 AM   #2
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The carbs need to be cleaned.
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