Running Rough After Hitting Pothole


Information and questions on GL1500 Goldwings (1988-2000)
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gaillarry
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Location: North Bay, ON Canada
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Running Rough After Hitting Pothole

Postby gaillarry » Wed May 12, 2010 7:03 am



My buddy and I were out riding our bikes yesterday when his 88 hit a large pothole. After hitting the pothole the engine started running really rough. There's nothing damaged. We checked for loose spark plug wires and exhaust leaks. It feels like the engine is missing when running. We plan to strip the bike today and have a good look at the carbs/engine. Any suggestions what to look for?



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thrasherg
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Re: Running Rough After Hitting Pothole

Postby thrasherg » Wed May 12, 2010 4:00 pm

I really can't believe it would be anything mechanical in the engine, I would be looking for a broken wire or disconnected plug somewhere.. I would expect it to be electrical rather than mechanical.. Having said that, I have no idea where to start looking.. :oops:

Gary

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WingAdmin
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Re: Running Rough After Hitting Pothole

Postby WingAdmin » Wed May 12, 2010 9:53 pm

I agree - I would concentrate on electrical at first. Not saying it couldn't be mechanical, but I'd guess it would be electrical first.

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WingAdmin
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Posts: 17050
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Re: Running Rough After Hitting Pothole

Postby WingAdmin » Thu May 13, 2010 1:09 pm

Just thinking about what else mechanical could cause this - what about a vacuum hose? If a vacuum hose was loose or just barely hanging on, a good jolt could knock it loose, and that could certainly cause it to run rough.

gaillarry
Posts: 30
Joined: Mon Aug 03, 2009 7:04 am
Location: North Bay, ON Canada
Motorcycle: 1998 GL1500

Re: Running Rough After Hitting Pothole

Postby gaillarry » Sat May 15, 2010 10:23 am

We'll find out tomorrow, hopefully it's something minor. Will post back the results.

gaillarry
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Joined: Mon Aug 03, 2009 7:04 am
Location: North Bay, ON Canada
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Re: Running Rough After Hitting Pothole

Postby gaillarry » Sun May 16, 2010 8:17 am

First thing we noticed was the connection on a hose was open, is this normal? The engine backfires on acceleration which I think is carb related.


raycw
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Location: Jackson, CA
Motorcycle: 88 GL1500

Re: Running Rough After Hitting Pothole

Postby raycw » Fri May 21, 2010 12:30 pm

Don't worry about that open line. You have an 88 that was modified at the factory and is not a California model. This open line goes to another valve on the California models only. It's open on the 49state models... which is what you have.

Get yourself a really powerful flash light. Remove the radiator grille (2 8mm nuts at the top of the grille) and remove the plastic cover just below the grille. Now you'll need a long straight blade screwdriver and use the flash light to shine inside where the carbs are. You're looking for the fuel drain screws. Open both of the drain screws and drain all the gas out.

I got the feeling that there might be some debris inside the carbs that's getting inside the jets after hitting the pothole.
You might find some water inside the carbs also. It'll all drain out.
Those screws aren't easy to see so look hard... they're there... just hard to find.

Oh yeah... the drain screws should be on each side of the frame down tube. One on each side. You'll need a long screwdriver... probably at least 12" long.

gaillarry
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Location: North Bay, ON Canada
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Re: Running Rough After Hitting Pothole

Postby gaillarry » Fri May 21, 2010 6:15 pm

Drained the carbs and it runs great now, must have been dirt loosened by the hit.




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