"slapping noise" at low rpm


Information and questions on GL1100 Goldwings (1980-1983)
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bubuh
Posts: 2
Joined: Sun Aug 15, 2010 12:32 am
Location: Lebanon, Oregon
Motorcycle: 1982 gl1100 interstate

"slapping noise" at low rpm

Postby bubuh » Mon Aug 16, 2010 2:58 am



I have a 82 gl1100i. It makes a slapping noise at low rpm that seems to be coming from the left side of the engine. This only happens when the rpms gets down way low. I have had one other gl1100 and it did the same exact thing. Back then I fiddled and fiddled with the carbs trying to remedy this. What's going on there? Thanks!



gimpychum
Posts: 12
Joined: Sat Aug 29, 2009 5:23 am
Location: Council Bluffs, IA
Motorcycle: 1985 GL1200 LTD

Re: "slapping noise" at low rpm

Postby gimpychum » Mon Aug 16, 2010 5:15 am

Could it be the left timing belt slapping? Maybe the tensioner is going out.

bubuh
Posts: 2
Joined: Sun Aug 15, 2010 12:32 am
Location: Lebanon, Oregon
Motorcycle: 1982 gl1100 interstate

Re: "slapping noise" at low rpm

Postby bubuh » Mon Aug 16, 2010 10:16 am

How would I know for sure if that's the problem? Seems like I should be able to tell by pushing on the belt itself. After reading posts here... Since I don't know how long the timing belts have been on there, I was going to go ahead and change those... So I could look into the tensioner thing then. The sound SEEMs to be coming from a bit further back than that... Like right near my L leg when I'm sitting on the bike.
I sure appreciate any help. Thanks!

leanjoe
Posts: 70
Joined: Sun May 30, 2010 4:15 pm
Location: Henderson, Nv
Motorcycle: 82 GL1100a Aspencade

Re: "slapping noise" at low rpm

Postby leanjoe » Mon Aug 16, 2010 12:37 pm

Since it was the same on the other bike,I suspect its the starter chain. Some guys do an oil change with a little MMO in it for a hundred miles or so,to loosen up any stuff in there. Otherwise I would'nt worry about it,its at low rpm,(idle) ? Most make some noise.

leanjoe
Posts: 70
Joined: Sun May 30, 2010 4:15 pm
Location: Henderson, Nv
Motorcycle: 82 GL1100a Aspencade

Re: "slapping noise" at low rpm

Postby leanjoe » Wed Aug 18, 2010 10:06 am

Synch carbs and adjust valves too.




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