low rpm sluggish,,83 1100 low miles


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twick23
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Location: Omaha,ne
Motorcycle: "1983 GL1100 INTERSTATE

low rpm sluggish,,83 1100 low miles

Postby twick23 » Mon May 31, 2010 9:31 pm



Just purchased this machine it has 14,000 miles. 2nd owner,,Older fella didn't drive it alot... It runs really rough at low rpms and misses alittle bit on take off.. High rpms runs like a champ. Changed plugs, fuel filter, air filter and also ran sea foam threw the gas tank,, It seems like she's really cold blooded!!! any thoughts. I've only put on 500 miles since I've had it...



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scratcho
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1982 GL1100 S
1978 GL1000
1976 GL1000 x2

Re: low rpm sluggish,,83 1100 low miles

Postby scratcho » Mon May 31, 2010 9:34 pm

Check the carb synch.

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twick23
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Re: low rpm sluggish,,83 1100 low miles

Postby twick23 » Mon May 31, 2010 9:38 pm

Thanx I'll give it a try

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WingAdmin
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Re: low rpm sluggish,,83 1100 low miles

Postby WingAdmin » Mon May 31, 2010 9:50 pm

Yep, this sounds like classic carb sync. They also do tend to run better and better the more you ride them. Sometimes it takes 2-3 tanks of good gas with Seafoam in them to really clean out and run well, especially if they've sat for a length of time.

raycw
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Re: low rpm sluggish,,83 1100 low miles

Postby raycw » Tue Jun 01, 2010 7:30 pm

With only 14k miles on it I'd think there's gunk in the carbs and maybe the fuel tank. The SeaFoam is a good idea but don't be too surprised if it doesn't work. But it's cheap and easy... those are the first things to try.

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twick23
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Location: Omaha,ne
Motorcycle: "1983 GL1100 INTERSTATE

Re: low rpm sluggish,,83 1100 low miles

Postby twick23 » Wed Jun 02, 2010 12:27 pm

The previous owner said he had the carbs done over the winter,,I guess I should take that with a grain of salt,,,

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thrasherg
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Re: low rpm sluggish,,83 1100 low miles

Postby thrasherg » Wed Jun 02, 2010 1:10 pm

At low revs, most of the fuel is coming from the idle circuit in the carbs, these are the smallest jets in the carbs and as such are the first to block with dirt or gunk from old gas.. Your sea foam might clear them out, but unless you are using small throttle openings, most of the sea foam will pass through the main jet and not the idle jets (meaning it won't clean the idle jets!). You need to try and drive it a lot at small throttle openings so the sea foam is drawn through the idle circuits (and can therefore clean them) or remove the carbs and clean the jets out with a solvent and compressed air.

Gary




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