Rough Running engine

Information and questions on GL1200 Goldwings (1984-1987)
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Posts: 115
Joined: Fri Oct 21, 2011 8:55 pm
Location: Clarksville, TN
Motorcycle: 1985 GL1200A Apsencade
1998 GL1500 SE

Rough Running engine

Post by Poohman » Tue Nov 08, 2011 6:45 pm

Just want to see if anyone could let me know if I am going in the right direcion or not. I took a ride on my 85 GL1200 Apsencade and everything was fine the after about 35 to 40 minutes in my ride I had to pull over and make a phone call. Well after that I stated the bike and it ran like the timing was off or something. It didn't want to run and sounded rough. It sounded like it was back firing through the exhaust and the carbs but i really could not tell. I am wondering if it is out of time or do I need to get new timing belts. I have changed Plugs, Fuel Filter and have used Sea Foam in the gas for about a week now on a full tank of gas and it seemed to help the carbs. I really could use some quick help. I have a Ride coming this saturday with the guys at church and really like riding.

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Motorcycle: 1996 GL1500SE 100k
1986 GL1200A (SOLD) 81K
1985 GL1200A (SOLD) 85K
1986 BMW K75c 28K

Re: Rough Running engine

Post by Mooseman » Tue Nov 08, 2011 10:31 pm

Is this the first ride? If it was running fine before I would lean towards a bad plug or plug wire. If you just added more sea foam to your full fuel tank when filling up. Maybe the concertration was too strong. This has caused problems in the past.
I myself have not heard of a cam belt jumping teeth on the wing. If loose they will slap the inside of the case and cover. Timing is set throught the ignition box and crank sensor. Non adjustable.
Check your vacuum lines. The one that goes to the ignition control box could cause this problem. Plus there is one back by the fuel filler cap that if unhooked will cause it to run bad.
Enjoy the ride. They are all good, just some better than others.

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