Strange running problem


Information and questions on GL1000 Goldwings (1975-1979)
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billythegrape
Posts: 15
Joined: Wed Jun 29, 2016 7:08 am
Location: Knoxville, TN
Motorcycle: 1977 GL1000

Strange running problem

Postby billythegrape » Thu Sep 22, 2016 2:46 pm



77 GL1000
No engine mods. Carbs have been rebuilt. New coils, wires, caps, resistor. New honda fuel filter. Air shut off has been rebuilt. All hoses are new. Valves adjusted last year. Gas tank electrolized in July. New fuel pump. Timing belt and water pump have been done, as has thermostat. Dyna ignition. Straight pipe exhaust.

The bike runs and idles great mornings (60-65 degrees F) until after about 5 miles. At this point, it sputters and wants to die at idle only. It'll start back every time, but sometimes I have to give it a little throttle. This sputtering is intermittent but enough to be worrisome.

On afternoons going home (80-100 degrees F), it does the opposite. After 5 miles or so, the idle wants to rise to 2000-2500 RPM. Runs great otherwise. I counteract this by closing the throttle at the grip and locking it with the throttle stop.

Could this be leaking float needles? The plugs read normal; hard to tell with ethanol fuel these days.



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

Re: Strange running problem

Postby dingdong » Fri Sep 23, 2016 6:32 am

Were the carbs synced after rebuild? You might want to re-check. A sync should be the last thing done after all the other tuning procedures are complete.
Tom

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billythegrape
Posts: 15
Joined: Wed Jun 29, 2016 7:08 am
Location: Knoxville, TN
Motorcycle: 1977 GL1000

Re: Strange running problem

Postby billythegrape » Fri Sep 23, 2016 7:15 am

I synced them. They were within 1-2psi of one another.


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