Rattle in left head


Information and questions on GL1100 Goldwings (1980-1983)
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weathersh09
Posts: 11
Joined: Wed Jul 28, 2010 8:54 am
Location: Greer, SC
Motorcycle: 1982 Honda Goldwing GL 1100

Rattle in left head

Postby weathersh09 » Mon Nov 14, 2011 5:19 am



Noticed recently that my 82 GL1100 seems to have developed a knocking/rattling noise in the motor. Seems to be coming from the left cylinder head. Dont really notice it at cruising speed, but if I have to climb a hill, or during takeoff, its louder than the exhaust. Any ideas? Also, I have no idea how old the spark plugs are.



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dingdong
Posts: 2864
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: Rattle in left head

Postby dingdong » Mon Nov 14, 2011 9:24 am

Your problem could be as simple as bad gas or carbon build up in the cylinders. Pinging or knocking can occur. I would first run some Seafoam through carbs via the gas tank and see if that helps. Might take two treatments to remove any carbon buildup.
You could also have a timing problem caused by the vacuum advance. Check for vacuum leaks or sticking advance.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

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WingAdmin
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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: Rattle in left head

Postby WingAdmin » Mon Nov 14, 2011 10:49 am

It sounds like primary chain knock, which can usually be solved with a good carb sync, assuming the compression is reasonably good on all four cylinders.

weathersh09
Posts: 11
Joined: Wed Jul 28, 2010 8:54 am
Location: Greer, SC
Motorcycle: 1982 Honda Goldwing GL 1100

Re: Rattle in left head

Postby weathersh09 » Mon Nov 14, 2011 4:16 pm

So you think its simple as a tuneup, basically? Plugs, carb sync, fuel filter, air filter, and some gas additive?

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WingAdmin
Site Admin
Posts: 17050
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: Rattle in left head

Postby WingAdmin » Mon Nov 14, 2011 5:55 pm

The 4-cylinder wings are famous for the primary chain rattle you describe. It is usually caused by carbs that need to be synchronized. If the bike is otherwise in need of a tune, do that first, then sync the carbs last, as if you sync the carbs then do the tune-up, you'll need to re-sync the carbs again afterward.




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