Very High Idle


Information and questions on GL1000 Goldwings (1975-1979)
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TechSpeaker
Posts: 24
Joined: Fri Dec 29, 2017 12:18 pm
Location: Stephenville TX
Motorcycle: 1978 GL1000

Very High Idle

Post by TechSpeaker » Thu Jun 13, 2019 11:07 pm



Hey guys, A couple weeks ago I got my '78 goldwing running. It had an idle of around 3k initially, which I figured I could fix later and not be too worried about. However, after hooking up the throttle cables and messing with some stuff (the idle adjustment screw seems to be doing nothing) my idle is now at about 6k. Next thing I'm going to do is a carb sync. Any other suggestions?



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kwild
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Motorcycle: 84 Standard
85 Aspencade

Re: Very High Idle

Post by kwild » Fri Jun 14, 2019 6:53 pm

Check the simple stuff first, possible the fuel filter is hitting the linkage and keeping it from retracting to idle position????
84 Standard
85 Aspencade

If God didn't want us to eat animals, why did he make them out of meat?

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ekvh
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Motorcycle: 1977 gl1000

Re: Very High Idle

Post by ekvh » Sun Jun 16, 2019 11:03 am

Cables can bind in the sheaths. Try starting it and removing or loosing the cables from the bellcrank at the back of carbs. If you can get the idle down that way, you found an issue.

Did you bench sync the carbs. This can be done with carbs on the bike. Just remove the elbows. They’ll come off easier if hot. I bench sync with throttle plates as close to fully closed as I can. Try and show half of the hole in the throat of the carb.

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TechSpeaker
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Location: Stephenville TX
Motorcycle: 1978 GL1000

Re: Very High Idle

Post by TechSpeaker » Sun Jun 16, 2019 2:46 pm

ekvh wrote:
Sun Jun 16, 2019 11:03 am
Cables can bind in the sheaths. Try starting it and removing or loosing the cables from the bellcrank at the back of carbs. If you can get the idle down that way, you found an issue.

Did you bench sync the carbs. This can be done with carbs on the bike. Just remove the elbows. They’ll come off easier if hot. I bench sync with throttle plates as close to fully closed as I can. Try and show half of the hole in the throat of the carb.
I'm not sure what bench syncing is, I'm going to get a sync kit and with the vacuum testing method where you screw the vacuum tubes into the ports on the elbows. It can't be the cables because it's had this problem since before I installed them a couple days ago.

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TechSpeaker
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Location: Stephenville TX
Motorcycle: 1978 GL1000

Re: Very High Idle

Post by TechSpeaker » Fri Jul 05, 2019 12:04 pm

I've solved it. I hadn't set my valve lash properly (And by that I mean, I hadn't set it at all.) the lock nuts and the adjustment screws had all come completely free. I set this properly and now It's idling between 1k and 2k. A proper carb sync out to fix this, becuase they've been taken apart for a rebuild and can't be properly in tune.

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Re: Very High Idle

Post by WingAdmin » Tue Jul 09, 2019 12:20 pm

TechSpeaker wrote:
Fri Jul 05, 2019 12:04 pm
I've solved it. I hadn't set my valve lash properly (And by that I mean, I hadn't set it at all.) the lock nuts and the adjustment screws had all come completely free. I set this properly and now It's idling between 1k and 2k. A proper carb sync out to fix this, becuase they've been taken apart for a rebuild and can't be properly in tune.
Anytime you change anything that can affect idle (valve lash definitely counts) you should always do a carb sync LAST after everything else is done.



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