vacumn


Information and questions on GL1500 Goldwings (1988-2000)
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wingsofgold
Posts: 7
Joined: Wed Aug 22, 2012 1:28 pm
Location: Ellijay, Georgia
Motorcycle: 1984 gl1200 A
1994 gl1500 I

vacumn

Postby wingsofgold » Wed Aug 22, 2012 1:55 pm



put in new air filter and decide to sync carbs. Im familar with doing this and have done several times before. I have the 4 gauge set . I hooked up both sides to gauges. To my surprize i have vacumn on right side but left side has almost nothing.I turned my adjusting screw but nothing changes I have turned it all way in to three full turns out. no change. took out the nipple on left side and put gauge nipple in. no change I have tried it on all four gauges and it was same. no change. Bike starts and has a little hint of a miss. Get on the throttle and no hesitation. Gas mileage down in dumps Been at this for three days now and tried all i know. Help!!!



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WingAdmin
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: vacumn

Postby WingAdmin » Wed Aug 22, 2012 2:47 pm

Is this your 1200 or 1500?

wingsofgold
Posts: 7
Joined: Wed Aug 22, 2012 1:28 pm
Location: Ellijay, Georgia
Motorcycle: 1984 gl1200 A
1994 gl1500 I

Re: vacumn

Postby wingsofgold » Wed Aug 22, 2012 2:57 pm

im sorry. This is my GL1500 interstate

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WingAdmin
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Posts: 17045
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: vacumn

Postby WingAdmin » Wed Aug 22, 2012 3:03 pm

Are you sure you hooked it up to the right place? If there was no vacuum (i.e. no flow) on the left side of the engine, you'd get quite a bit more than a hint of a miss.

wingsofgold
Posts: 7
Joined: Wed Aug 22, 2012 1:28 pm
Location: Ellijay, Georgia
Motorcycle: 1984 gl1200 A
1994 gl1500 I

Re: vacumn

Postby wingsofgold » Wed Aug 22, 2012 3:11 pm

Im positive I hooked in proper place on left side. In fact i took the nipple out and put in the vacumn gauge nipple. both sides are 5 mm Like i said in post i have done this before and adjusted but never had this kind of problem

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virgilmobile
Posts: 7644
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: vacumn

Postby virgilmobile » Wed Aug 22, 2012 4:23 pm

My 3 cents....
Can I assume that you have synced this bike before successfully using the same fittings and gauges and now there is no/low vacuum on one side?
A possibility is a large vacuum leak on that side.

wingsofgold
Posts: 7
Joined: Wed Aug 22, 2012 1:28 pm
Location: Ellijay, Georgia
Motorcycle: 1984 gl1200 A
1994 gl1500 I

Re: vacumn

Postby wingsofgold » Wed Aug 22, 2012 5:45 pm

Yes i have sync it before with same gauges with out any trouble.. I know gauges are good because i switched all four of the gauges one at a time to right side.

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virgilmobile
Posts: 7644
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: vacumn

Postby virgilmobile » Wed Aug 22, 2012 5:54 pm

I would first remove the air cleaner,open the slides up and inspect the throttle plate.See that they are both very near closed and operate evenly with the throttle.
A large vacuum leak on the hose under the rubber mat could cause this problem.this hose is a known weak spot as any hose with a sharp 90* bend in it.I found 7 of them on my 88

wingsofgold
Posts: 7
Joined: Wed Aug 22, 2012 1:28 pm
Location: Ellijay, Georgia
Motorcycle: 1984 gl1200 A
1994 gl1500 I

Re: vacumn

Postby wingsofgold » Wed Aug 22, 2012 7:41 pm

Virgil Im not sure what mat your talking about. When i take top tupperware off bike and the radio out then there is the air filter box. take the screws out and lift off top. When you lift off top them your looking at the filter. Lift air filter off and your looking right down barrel of both carbs. I always clean them while i got them open with carb cleaner and a rag and a artist paint brush. so im not sure what rubber mat your talking about

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zamboni920
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Location: Stavanger, Norway
Motorcycle: 1996 GL1500 SE with Hannigan 2+2 sidecar

Re: vacumn

Postby zamboni920 » Wed Aug 22, 2012 8:19 pm

The "rubber mat" is below the carbs. Sort of creates a heat shield/ water shield. Some vacuum hoses runs under this mat.

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virgilmobile
Posts: 7644
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: vacumn

Postby virgilmobile » Wed Aug 22, 2012 8:58 pm

Sorry about that mate.It took me 3 hours to get to that mat the first time. One hose under it had a hole in it.
Oh and yes,you have to drain the antifreeze to get the carbs off.
Now I'm not saying that you have the same problem,its just something to keep in mind.




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