76 GL1000 strange sync result


Information and questions on GL1000 Goldwings (1975-1979)
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Typhon
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Motorcycle: 1976 GL1000 Red
1976 GL1000 Silver
1981 GL1100 Interstate

76 GL1000 strange sync result

Postby Typhon » Fri Sep 28, 2012 4:40 pm



Hello all, had a strange result after performing a carb sync that I don't understand. After syncing both banks to each other(they were way off), the exhaust became very thick, like way bad. How could synchronizing the carbs produce this? Other than that, it did improve the running, no more backfiring. Any thoughts? Keep in mind that I am new to cycle mechanics so be kind if this is a stupid question.

Typhon



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WingAdmin
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Re: 76 GL1000 strange sync result

Postby WingAdmin » Fri Sep 28, 2012 7:26 pm

Are you sure you were adjusting the sync screw and not the mixture screw?

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Typhon
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Joined: Tue Aug 21, 2012 11:39 pm
Location: Midvale, Utah
Motorcycle: 1976 GL1000 Red
1976 GL1000 Silver
1981 GL1100 Interstate

Re: 76 GL1000 strange sync result

Postby Typhon » Sat Sep 29, 2012 3:16 am

Haha! Yes I'm positive. I guess I should say that the moisture behind my ears is more simply damp and not dripping down my neck. Anyway I should add that the smoke is not black, it is white which I supposed could mean water, light oil or coolant. I understand significant oil would or could be a bit bluish. It did not smell like fuel and the gas is fairly fresh and treated with seafoam. Also, the timing and compression has been checked recently as well but not by myself. The mechanic who did that also did a valve and point adjustment. He said that everything was well. He said it did need a carb sync but he wasn't able to do it himself because his sync tool was busted. Hope that helps.

Typhon

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Fred Camper
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Re: 76 GL1000 strange sync result

Postby Fred Camper » Sat Sep 29, 2012 8:14 am

Syncing carbs cannot do that in my experience. I suspect you had something else going on at the same time. Sounds like pressurizing the coolant system might be a good idea.

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Typhon
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Location: Midvale, Utah
Motorcycle: 1976 GL1000 Red
1976 GL1000 Silver
1981 GL1100 Interstate

Re: 76 GL1000 strange sync result

Postby Typhon » Mon Oct 01, 2012 6:28 pm

Pressurize the coolant system? Do you mean perform a pressure test?

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Fred Camper
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Re: 76 GL1000 strange sync result

Postby Fred Camper » Tue Oct 02, 2012 6:43 pm

See if the head gasket leaks coolant by clamping a cut inner tube over the opening in the radiator neck, closing off the other end of the inner tube by rolling it up tight and clamping it closed, pinching off the overflow coolant hose with a vise grip, then use a bike pump to get 15 psi into the coolant system. Or use a coolant pressure tester which does the same thing for those of us less handy.

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Typhon
Posts: 8
Joined: Tue Aug 21, 2012 11:39 pm
Location: Midvale, Utah
Motorcycle: 1976 GL1000 Red
1976 GL1000 Silver
1981 GL1100 Interstate

Re: 76 GL1000 strange sync result

Postby Typhon » Wed Oct 03, 2012 4:08 am

Excellent, I will give it a shot and will post the results.




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