Engines runs rough...with new part.

Information and questions on GL1500 Goldwings (1988-2000)
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Posts: 2
Joined: Sun May 27, 2012 1:15 pm
Location: Stuart, Florida
Motorcycle: 1994 GL1500se

Engines runs rough...with new part.

Post by baxterk9 » Sun May 27, 2012 1:21 pm

I had my bike stall on the road one day. I decided to take it home first. I found out that my auto fuel valve diaphragm was halfway gone. I bought a new auto fuel valve and now the bikes runs, but very rough. I drive it down the road and it backfires a lot as I am about to change to second gear. The bike seems to be lacking power. I also changed the spark plugs. I gaped them too before I put them in. Anybody have any ideas?

Posts: 20
Joined: Mon Apr 25, 2011 7:30 pm
Location: Medford, Ore. USA
Motorcycle: 1998 GL1500 Aspencade

Re: Engines runs rough...with new part.

Post by terryj » Mon May 28, 2012 10:47 am

Check your vaccum lines, this can cause the problem your experiencing.

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Posts: 8311
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: Engines runs rough...with new part.

Post by virgilmobile » Tue May 29, 2012 9:29 am

There is a vacuum line that feeds the fuel valve.It is "T" tapped into a line on the right hand manifold and it can be bad right at the sharp 90* bend.
And yes,my 88 had 7 collapsing vacuum lines sprinkled about.
2 on each manifold,2 on the carbs,and one buried under the rubber mat UNDER the carbs.
I spent all day getting to them.Yuck.

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