Carb Sync problem


Information and questions on GL1000 Goldwings (1975-1979)
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LaGreca
Posts: 12
Joined: Thu Mar 29, 2012 8:48 pm
Location: Aurora, Colorado
Motorcycle: 1977 GL1000 Goldwing

Carb Sync problem

Postby LaGreca » Sun May 19, 2013 6:15 pm



Afternoon everyone,
So I rebuilt my Gl1000s carbs. Finally got it to run without choke, but now I have very high(fast) idle of around 2500~3000RPM. I have the tried to sync the carbs with a vacuum gauge set, see pic. Carb 3 is pointing down while I got the other 3 in a reasonable position and my idle dropped around 2500. Any suggestions or thoughts I could have missed? Thanks to anyone and everyone who has helped bring my bike to life.



This was before I messed with it



Could I have an Air leak? I am going to check around with some liquid and see for bubbles or if it gets sucked in.



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portugeezer
Posts: 424
Joined: Sun Feb 13, 2011 3:44 pm
Location: Mchenry, Illinois
Motorcycle: 1976 gl1000
1982 Gl500
1984 Honda Magna V30

Re: Carb Sync problem

Postby portugeezer » Sun May 19, 2013 9:51 pm

Now you turn the screw on the left side rear carb and balance them out. You are almost done with the sync just missing the last step. Either that or I'm not understanding the question. Won't be the first time if that's the case!

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Fred Camper
Posts: 1152
Joined: Sun Aug 16, 2009 9:15 pm
Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: Carb Sync problem

Postby Fred Camper » Sun May 19, 2013 10:02 pm

If you think you have a leak then use unlit propane torch to pin point it . When propane is pulled into the leak, idle speed will rise. Easy method.

lsandfd
Posts: 1
Joined: Mon Oct 19, 2009 6:16 am
Location: Cape Town, Western Cape, ZA
Motorcycle: 1979 GL1000

Re: Carb Sync problem

Postby lsandfd » Wed Jun 12, 2013 10:40 am

Might be a bit late, but I have the same sync kit - I found that it was the rubber tubing up to the gauges that was cracked and leaking. Very similar symptoms.

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Fulcrum
Posts: 181
Joined: Thu Mar 07, 2013 1:54 pm
Location: The Falls, Texas
Motorcycle: 1982 GL1100

Re: Carb Sync problem

Postby Fulcrum » Sun Jun 16, 2013 1:32 am

I like Isandfd's suggestion. Easy way to test is to find one cylinder that is reading well and attach all the hoses to it one at a time and see if they all show the same reading. Hoping I'm not asking a dumb question but did you bench synch it before you installed the carbs on the bike?

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LaGreca
Posts: 12
Joined: Thu Mar 29, 2012 8:48 pm
Location: Aurora, Colorado
Motorcycle: 1977 GL1000 Goldwing

Re: Carb Sync problem

Postby LaGreca » Wed Aug 21, 2013 7:34 pm

Again, sorry for late reply. I did not bench it before I started the job. When I got the bike I needed to rebuild the carbs because she was sluggish and would not run off choke. I have finally got her synched to a point and when they are all the same they tend to "wonder" so I think the gauges are a bit off... maybe not. I moved around the tubes and same on all. It took a lot of moving back out and starting from them all being out and then starting to go back in. I can get her to idle around 800-900. I just took her for a drive and while it wasn't perfect it was far better than when I bought her 2 years ago. :D Just need to figure out the high RPM when I am in first gear and then she should be good as new! :D :D :D :D :D




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