Strange noise oh GL1100 1982


Information and questions on GL1100 Goldwings (1980-1983)
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JB THEVENON
Posts: 32
Joined: Tue Jan 19, 2021 5:11 pm
Location: Montigny-le-Bretonneux / Yvelines / France
Motorcycle: 1982 GL1100A Aspencade

Strange noise oh GL1100 1982

Post by JB THEVENON »



Hi everyone
My wife, then my teenager told me they heard a noise. I also heard something that sound similar to this (bike on center stand third gear) :


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Of course when the rear wheel turns freely there are all noises produced by the kinematics chain between piston and the final shaft.
The sound however was declared similar by both my wife and son.
To raise the doubt I decided to use a high tech tool here below : I noticed nothing really special on engine side (for a 55 000 miles bike).

I decided then to have a small ride alone (a dozen miles) : => no more noise. Amazing !

Do anyone has already experienced a noise from the rear only when there is a passenger ? could it be the final shaft, the swing arm ...

(I can already expect some answers : no my wife is not used to snore on a long ride ! :D )
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my philosophy : To do is to be (Kant). To be is to do (Sartre), Do be do be do (Sinatra)
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WingAdmin
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: Strange noise oh GL1100 1982

Post by WingAdmin »

I'd first check the universal joint. I don't know how much it is being flexed when you have a passenger, but if it's marginal, running it flexed a bit more from a passenger might get it starting to make some clicking noises like that.
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DenverWinger
Posts: 1861
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Strange noise oh GL1100 1982

Post by DenverWinger »

Engine sounds great! :) Noise sounds like gear/drivetrain backlash on idling engine.

Idling 3dr gear on center stand, there's plenty of places to have some backlash in the gears, and this will be much more noticeable al idle RPM. Since the noise seems to be more from the rear when you have the camera back there here's some places to check for excessive backlash:

Could just be the primary drive chain, known to make a 4cyl wing rattle like a bucket of bolts if the carbs aren't exactly in sync, and sometimes flap around anyway. Usually only heard at idle.
Driveshaft splines - Been checked/lubed recently? Might be worn.
Worn U-joint.
Final Drive unit. Check for sloppy pinion bearing. These are pretty robust, not likely worn.
Splines in final drive and wheel where they mate. Don't think it would sound like that, though, probably would be quiet until they are so worn they just "Spin out" under load.
The pins and rubber dampers where the final drive hub mates into the wheel.

There's always going to be a certain amount of backlash in a gear train, and in-gear with idling engine will just amplify this. Engine speed will vary +- a percentage twice each crankshaft rev with each compression and power stroke, and the rear wheel spinning in gear is trying to act as a flywheel +- the drivetrain backlash.

Unless it is noisy like this driving down the road I wouldn't worry about it.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark
JB THEVENON
Posts: 32
Joined: Tue Jan 19, 2021 5:11 pm
Location: Montigny-le-Bretonneux / Yvelines / France
Motorcycle: 1982 GL1100A Aspencade

Re: Strange noise oh GL1100 1982

Post by JB THEVENON »

many thanks for your answers.
To WingAdmin : what is exactly the universal joint you mentionned ?
To DenverWinger : I did a maintenance this winter and changed drive shaft lub an put grease using the nipple grease. Perhaps I didn't put enough grease because I can't see through my manual pump.....

thanks again for your advices
my philosophy : To do is to be (Kant). To be is to do (Sartre), Do be do be do (Sinatra)
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DenverWinger
Posts: 1861
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Strange noise oh GL1100 1982

Post by DenverWinger »

There is a U-Joint in the drive shaft right by the engine, you will find it inside the rubber boot between the swingarm and the engine.
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark
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WingAdmin
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Posts: 22049
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: Strange noise oh GL1100 1982

Post by WingAdmin »

JB THEVENON wrote: Sat Jun 19, 2021 3:07 am many thanks for your answers.
To WingAdmin : what is exactly the universal joint you mentionned ?
To DenverWinger : I did a maintenance this winter and changed drive shaft lub an put grease using the nipple grease. Perhaps I didn't put enough grease because I can't see through my manual pump.....

thanks again for your advices
The bike uses a driveshaft to get the power from the transmission to the rear wheel. Because the rear wheel can move up and down with the suspension, you can't have a rigid shaft. So they put a universal joint in at the exact same position as the swingarm pivots, to allow the shaft to "bend" as it rotates.

Over time, the bearings in the universal joint can wear out, and the resulting slop can make that kind of noise. If you aren't hearing noise when the universal joint is not under stress (i.e. output shaft is fairly aligned with the transmission, U-joint is not bent), but are when the joint IS under stress (suspension compressed, U-joint is bent) then often a worn U-joint is the cause of that noise.
JB THEVENON
Posts: 32
Joined: Tue Jan 19, 2021 5:11 pm
Location: Montigny-le-Bretonneux / Yvelines / France
Motorcycle: 1982 GL1100A Aspencade

Re: Strange noise oh GL1100 1982

Post by JB THEVENON »

you are talking about part N°1 right ?


my philosophy : To do is to be (Kant). To be is to do (Sartre), Do be do be do (Sinatra)
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WingAdmin
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Posts: 22049
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (sold)
1998 XV250 Virago (sold)
2012 Suzuki Burgman 400 (wife's!)
2007 Aspen Sentry Trailer

Re: Strange noise oh GL1100 1982

Post by WingAdmin »

Yes, that's correct.


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