Running rough at high speed


Information and questions on GL1000 Goldwings (1975-1979)
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Mjholi67
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Motorcycle: 1979 gl1000 gold wing

Running rough at high speed

Post by Mjholi67 »



I bought a 1979 Honda gold wing and looks ingrat condition. I have changed timing belt, oil, radiator fluid, oil for shaft drive.' She starts right up and has good accellaration through gears. I noticed on the freeway at 60-70 that when I try to accelerate it seems to run a little rough and accelates slowly at times smooths out and accelerates great but this isn't everytime. Suggestions?


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MikeB
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Re: Running rough at high speed

Post by MikeB »

It doesn't look like you did anything to your fuel system . Could be fuel related. You could try running some fuel additive through your gas tank. Gumout, Techron, Marvel Mystery Oil, Seafoam all come to mind.
MikeB
1998 - GL1500 w/184,500 miles ~ 2017 - GL1800 w/13000 miles
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dingdong
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Re: Running rough at high speed

Post by dingdong »

I would be searching for a vacuum leak and also the points can cause that problem if not set perfectly.
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WingAdmin
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Re: Running rough at high speed

Post by WingAdmin »

Could also be fuel related - a clogged fuel filter? High speed running uses a lot of fuel, and if you start demanding more than your fuel system can supply (i.e. clogged filter), it will bog down.

Under heavy load, it takes a lot more spark to ignite the air/fuel mixture, so you could be suffering from weak spark.

Is it losing power (bogging down) like you're running out of gas, or is it intermittent missing?
Mjholi67
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Re: Running rough at high speed

Post by Mjholi67 »

Thank you,

Those are all great pieces of information. I will attack the fuel filter, and plugs this weekend and ask a friend about the vacuum. Would you also recommend syncing the carbs for good measure?
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WingAdmin
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Re: Running rough at high speed

Post by WingAdmin »

Mjholi67 wrote:Thank you,

Those are all great pieces of information. I will attack the fuel filter, and plugs this weekend and ask a friend about the vacuum. Would you also recommend syncing the carbs for good measure?
Syncing carbs won't hurt, but unsynchronized carbs normally exhibit their behavior at low power/idle, not at high power output. That said, carb sync should be done as the very last thing on your list, as virtually everything else will affect it.


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