Unbearably high idle


Information and questions on GL1000 Goldwings (1975-1979)
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Drdemos
Posts: 12
Joined: Tue Oct 30, 2012 9:41 am
Location: Shingletown, ca
Motorcycle: 1977 GL1000

Unbearably high idle

Postby Drdemos » Sun Apr 28, 2013 4:08 pm



I finally finished my 1977 GL1000, and took it for a ride to town. I live about 45 minutes and 3000 feet elevation higher than "town." Suddenly when I got to town, I'm idling at about 4500-5000 RPMs. This is obviously problematic, and for more than just my wallet.

I rebuilt the carbs as part of restoring this bike - They were pretty fouled up. Is it possible that the throttle plates were "rigged" to be more open by the previous owners to compensate for the poor quality of the fouled up carburetors? And where is the idle adjustment screw?

Any help is greatly appreciated!



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Fred Camper
Posts: 1152
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Unbearably high idle

Postby Fred Camper » Sun Apr 28, 2013 8:23 pm

Sounds like a vacuum leak that opens up hot to me. The idle adjustment screws is down at your right side between the carbs and can be adjusted sitting on the bike, no tool needed. Try to tighten the clamps on the intake runners when it is hot next time.

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Placerville
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Joined: Tue Mar 09, 2010 12:58 pm
Location: Placerville, CA
Motorcycle: 1976 Naked Yellow

Re: Unbearably high idle

Postby Placerville » Sun Apr 28, 2013 10:38 pm

Agree with Fred. With the bike at temp and idling, take an unlit propane torch (cracked opened a touch) and pass it slowly around the carb area. When/if you come to an area that's sucking air, the propane will be pulled in and cause the idle to jump up.
Placerville- 1976 Yellow
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dingdong
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Unbearably high idle

Postby dingdong » Mon Apr 29, 2013 6:43 am

Did you synchronize the carbs after working on them?
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Drdemos
Posts: 12
Joined: Tue Oct 30, 2012 9:41 am
Location: Shingletown, ca
Motorcycle: 1977 GL1000

Re: Unbearably high idle

Postby Drdemos » Mon Apr 29, 2013 1:24 pm

Thanks! Not yet on the carb sync, but I wouldn't have imagined it could cause that big of a problem. It's definitely on the to do list. Thanks Fred and Placerville - I will be trying the propane tonight!

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SteveB123
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Joined: Thu Apr 05, 2012 9:29 am
Location: Winchester, Ontario, Canada
Motorcycle: 1982 1100I, 60A Poorboy, MSD coil

Re: Unbearably high idle

Postby SteveB123 » Mon Apr 29, 2013 2:30 pm

How can you have rebuilt the carbs and not discovered the adjustment screws?
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

Drdemos
Posts: 12
Joined: Tue Oct 30, 2012 9:41 am
Location: Shingletown, ca
Motorcycle: 1977 GL1000

Re: Unbearably high idle

Postby Drdemos » Mon Apr 29, 2013 3:50 pm

Well, I bought Randakks rebuild kit, then followed the Clymer manual. Since I had the screw below the bell crank completely backed out, I assumed that there was perhaps some other hidden idle adjuster that I was unaware of.

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dingdong
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Unbearably high idle

Postby dingdong » Tue Apr 30, 2013 7:13 am

Drdemos wrote:Thanks! Not yet on the carb sync, but I wouldn't have imagined it could cause that big of a problem. It's definitely on the to do list. Thanks Fred and Placerville - I will be trying the propane tonight!


Yes it can cause that big of a problem. Just one carb out far enough can cause this.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Drdemos
Posts: 12
Joined: Tue Oct 30, 2012 9:41 am
Location: Shingletown, ca
Motorcycle: 1977 GL1000

Re: Unbearably high idle

Postby Drdemos » Tue Apr 30, 2013 12:53 pm

Okay, think I got it fixed. The air/fuel screws were backed WAY out, the carbs were quite out of sync, and the "boots" weren't tightened down appropriately on the carb throats. It seems to be doing okay now. Thanks for all the help.

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Fred Camper
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Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Unbearably high idle

Postby Fred Camper » Tue Apr 30, 2013 4:25 pm

Good to hear, nice to know what you fixed so thank you.

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dingdong
Posts: 2864
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Unbearably high idle

Postby dingdong » Wed May 01, 2013 7:22 am

Alright! Another satisfied customer.


Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.


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