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Title: running poorly
Post by: rrbma on June 30, 2005, 05:05:19 AM

recently bought 90 gs500 pretty good shape, but idle is very irregular and will rev very high without me even on the bike. also getting bad back firing when off the throttle. looking for help. :dunno:

Title: running poorly
Post by: Jazzzzz on June 30, 2005, 05:06:50 AM

sounds like gummed up carbs to me -- pull em off and give em a good cleaning, can't hurt either way

Title: running poorly
Post by: scratch on June 30, 2005, 12:39:18 PM

Welcome!

I'll second the carb cleaning. Also, check the airfilter; make sure it's clean. And, check that the spark plugs are tight.

Title: running poorly
Post by: rrbma on July 01, 2005, 03:13:40 AM

will i need to get a carb kit if i take it apart to clean. i have the clymer manual but am new to cycling.

Title: running poorly
Post by: scratch on July 01, 2005, 07:51:37 AM

Shouldn't, but your bike is a '90 (15 years old), you could drop a floatbowl and inspect the rubber inside and go from there, or just be safe and order the set anyway. I really think you wont have to.

Title: running poorly
Post by: joedude on July 05, 2005, 02:36:45 PM

Hey, I'm having the same problem on my '96 E. I've only had it for a month, and I know that the previous owner drilled some holes in the stock exhaust but didn't re-jet. Also, I pulled off my spark plugs and noticed that one was normal, and the other was black as night... any ideas?

Cheers

Title: running poorly
Post by: Roadstergal on July 05, 2005, 02:49:07 PM

rrbma, do you turn the choke off (away from you) once the bike is warm? It only takes a minute or less...

Title: running poorly
Post by: vfrocket on July 05, 2005, 04:41:25 PM

I would 3rd the carb cleaning. Just go to local auto store and get some "d12" carb cleaner (I think that is what it is called) and a couple bags of mixed small o-rings.

you may have some worn out o-rings with a bike that old. My bike is a 2000 and when I cleaned mine I found that the o-rings that help hold the floats in were rotten...

Also see:
http://gstwin.com/carb_work.htm

Title: running poorly
Post by: scratch on July 05, 2005, 04:42:28 PM

And, this: http://gstwins.com/forum/viewtopic.php?t=18966

Title: running poorly
Post by: Chris.t.Collins on July 05, 2005, 07:34:08 PM

I had a similar problem and was able to fix it by adjusting the timing.

Title: running poorly
Post by: rrbma on July 12, 2005, 06:22:36 AM

rebuilt and cleaned well runns better but in each kit ended up with one very small o-ring unused didn't want to take to much apart but i folloed clymer's to a tee. :dunno:

Title: running poorly
Post by: Dragonfly on July 12, 2005, 06:26:27 AM

Quote from: Chris.t.CollinsI had a similar problem and was able to fix it by adjusting the timing.

so how exactualy did you adjust the timing???

Title: running poorly
Post by: scratch on July 12, 2005, 10:26:08 AM

Quote from: rrbmabut in each kit ended up with one very small o-ring unused didn't want to take to much apart but i folloed clymer's to a tee.

Probably the ones that go in under the tops of the carbs.

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Main Area => General GS500 Discussion => Topic started by: rrbma on June 30, 2005, 05:05:19 AM