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1980 gs1000g
Carbs rebuilt by Wired George around 9 months ago,new intake boots,ignition rewired to get full 12 volts to coils. Starts fine,idles fine ,warms up and starts revving to 2-3000rpm,will not idle until cold again,driving me effing nuts.I bought this bike new,did the alternator update,new clutch,front and rear master cylinders replaced,new petcock and fuel lines,new coils and wires,new mirrors,I guess I should have bought another bike...baffled in Orlando.Last edited by ironbiker; 06-11-2024, 10:55 AM.Tags: None
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Forum LongTimerGSResource Superstar
Past Site Supporter
Super Site Supporter- Mar 2006
- 35717
- Torrance, CA
You have an air leak.Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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Are you running CV carbs?
I'd guess something is out of sync or an air leak as already mentioned.
A stuck ignition advancer could also cause a smiliar issue.
Don't blame the bike. It did nothing wrong.
I've had plenty of issues with my GS750 and GS1000 but was always able to solve them.Current:
1993 ZX11 - 2nd build in progress
1977 GS750 (710 is getting closer)
1998 Kawasaki Voyager - selling
1998 Chevy C2500
1999 Rav4
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Forum GuruPast Site Supporter
Super Site Supporter- Jun 2018
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- Mifflinburg, PA / Land of Tar & Chip
I'll ask again. You bought this bike new? in 1980?
If you haven't done valve clearance check, or had it done recently by one of the best valve clearance check men in the country, then I'd get to it. It certainly can't hurt, and probably really needs to be done.Rich
1982 GS 750TZ
2015 Triumph Tiger 1200
BikeCliff's / Charging System Sorted / Posting Pics
Destroy-Rebuild 750T/ Destroy-Rebuild part deux
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Forum LongTimerGSResource Superstar
Past Site Supporter
Super Site Supporter- Mar 2006
- 35717
- Torrance, CA
I've seen two different sets of "George's" carbs, where the carbs were heavily contaminated by blasting beads on the inside. I had to do a full teardown to clean them out properly.
These are the O-rings that commonly leak air.
carb o-ring.pngEd
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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Forum LongTimerGSResource Superstar
Past Site Supporter- Oct 2006
- 13999
- London, UK to Redondo Beach, California
Originally posted by ironbiker View Postcarbs were bench synced by the one of the best carburetor men in the country.
1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
www.parasiticsanalytics.com
TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/
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Forum LongTimerGSResource Superstar
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Originally posted by ironbiker View PostI've read that maybe a valve adjustment would cure this..I dunno.
But, no, valve adjust will not cause a creeping idle.
Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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With the all the work I've done to it with no different results I suspect a crack internally...BTW the valve adjustment procedure on these engines is a clusterfxxk ,IMO. The valve adjustment will be done when and if I solve the creeping idle problem.I'm sure I'm not the only one to have this specific malfunction.Last edited by ironbiker; 06-13-2024, 08:09 AM.
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Where are you anticipating a crack, I've not seen that before... Adjusting valves may be a little aggravating, but hardest thing about checking them is removing valve cover.1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100
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Forum LongTimerGSResource Superstar
Past Site Supporter
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The valves on the shim and bucket GS's are very stable. It's one of the reasons these bikes run to 100,000 miles easily. They are dead easy to check too, and don't often need adjustment. I agree with rphillips that the most difficult part is removing the valve cover.
A creeping/hanging idle when hot is almost always related to the intake system in some way. A vacuum carb sync is required, and you can also try opening the pilot screws a little more. If the airbox side cover foam seals, and/or the seal on the air filter cage, is deteriorated, that will allow false air to enter the system also.Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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Forum GuruPast Site Supporter
Super Site Supporter- Jun 2018
- 5644
- Mifflinburg, PA / Land of Tar & Chip
You think shim over bucket is hard? Try a Triumph Triple or other engine w/ the shims UNDER the bucket.Rich
1982 GS 750TZ
2015 Triumph Tiger 1200
BikeCliff's / Charging System Sorted / Posting Pics
Destroy-Rebuild 750T/ Destroy-Rebuild part deux
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Yes, try my Honda CB1100F, shims under buckets, 2 cam chains, 2 cam chain adjusters. Royal PITA...Hard to imagine Suzuki started using "under the Bucket" in their 2007 Bandit 1250's.... For me as rare as spitting a shim is, they tried to fix something that wasn't broke, and just caused more problems... Also don't try to make me believe they did it to save wgt. on the valve train... That's what Kawasaki said back in the early 80's when they did it.1983 GS1100E, 1983 CB1100F, 1991 GSX1100G, 1996 Kaw. ZL600 Eliminator, 1999 Bandit 1200S, 2005 Bandit 1200S, 2000 Kaw. ZRX 1100
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