GL 1500 has a high idle but only sometimes
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- Motorcycle: 1991 gl1500 interstate
GL 1500 has a high idle but only sometimes
Hi all. I bought my first goldwing last summer. It's a 91 interstate. Serial #000001. Anyway I found when riding if I came to a stop it would sometimes idle high ( around 2000 rpm ). But only sometimes. I would guess around 25% of the time. Bike runs perfect otherwise. Any ideas? Thanks.
- offcenter
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76 GL-1000
77 Honda Trail 90
Re: GL 1500 has a high idle but only sometimes
Mine would do that "occasionally", when the outside temps were below 40 degrees.
Never does it in warm weather.
Damned if I know what causes it.
But since I rarely ride when temps are below 40, it hasn't really been
a problem.
Never does it in warm weather.
Damned if I know what causes it.
But since I rarely ride when temps are below 40, it hasn't really been
a problem.
George in Jersey.
99 Goldwing GL-1500 SE
76 Goldwing Gl-1000
77 Honda CT-90 "Trail 90"
99 Goldwing GL-1500 SE
76 Goldwing Gl-1000
77 Honda CT-90 "Trail 90"
- MikeB
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Re: GL 1500 has a high idle but only sometimes
My first thought is that you have an intermittent vacuum leak. Cracked and deteriorating vacuum hoses could be the cause.
MikeB
1998 - GL1500 w/184,500 miles ~ 2017 - GL1800 w/13000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
1998 - GL1500 w/184,500 miles ~ 2017 - GL1800 w/13000 miles
USAF Avionics Communications Tech - 1968 - 1986 / Flight Engineer C-130E - C-141B - 1986 - 1992. Retired
Industrial Maintenance Tech - 1992 - 2014
Retired in Tacoma, WA
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- Joined: Mon Feb 22, 2021 1:24 pm
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- Motorcycle: 1991 gl1500 interstate
Re: GL 1500 has a high idle but only sometimes
Ok I will look for that. Thanks
- ct1500
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Re: GL 1500 has a high idle but only sometimes
Absent a binding throttle cable and to a lesser extent enrichment cable the most likely cause would be from a carb sync problem where it was adjusted compensating for a carb problem.Swayze wrote: ↑Mon Feb 22, 2021 1:32 pm Hi all. I bought my first goldwing last summer. It's a 91 interstate. Serial #000001. Anyway I found when riding if I came to a stop it would sometimes idle high ( around 2000 rpm ). But only sometimes. I would guess around 25% of the time. Bike runs perfect otherwise. Any ideas? Thanks.
If I had a dollar for every poster who said "other than this problem it runs great" I would be comfortably retired.

Local and need repair help with your 1500, Valkyrie or ST please click contact
Nothing leaves my shop till its' perfect
This is what I do
Nothing leaves my shop till its' perfect
This is what I do
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- Joined: Mon Feb 22, 2021 1:24 pm
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- Motorcycle: 1991 gl1500 interstate
Re: GL 1500 has a high idle but only sometimes
Can I get to all the vacum lines by removing the top plastic and air filter? Thanks
- bellboy40
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Re: GL 1500 has a high idle but only sometimes
No. There are some under the air filter housing, some under the carbs and some more under the rubber mat below the carbs.
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- Joined: Mon Feb 22, 2021 1:24 pm
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Re: GL 1500 has a high idle but only sometimes
Crap that's not what I wanted to hear
- WingAdmin
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Re: GL 1500 has a high idle but only sometimes
The vacuum hose routing is pretty much spaghetti. It's buried, and it's extensive.