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george7941
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Toronto, Canada
Joined: 02/03/2016
Posts: 3

When the engine is revved up a bit, a sharp rattling noise emanates. This is with the bike stationary and in neutral. The noise started up suddenly, without any warning. I noticed that when the bike is in neutral, the rear wheel is hard to turn by hand, so my best guess is that something seized up in the tranny. The drag is very noticeable when pushing the bike in neutral. I have never pulled the tranny off, so the input shaft has never been lubed.

I have owned the bike since 1989 and it currently has 51k kms on it.

What might the problem be?

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1987 R80

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6540
Welcome! Your bike is in the

Welcome! Your bike is in the group of '85 to '94 bikes which had the circlip on the output shaft was eliminated. What can happen in this situation is that the bearing can walk forward, putting pressure on the shafts. Anton Largiader mentions it here:

http://www.largiader.com/articles/circlip/

You can disconnect the driveshaft and try turning the output shaft by hand. It should turn fairly easily...if it doesn't, then there's something wrong in the transmission. Also, if things are going bad, you probably should see some extra dust, maybe even some particles on the magnetic drain plug.

Check it out. If this is happening, best stop riding it and get the transmission to someone who can take care of it. It's no big deal to add the circlip. There are several people who can do the job.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

khittner
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VBMWMO #8223
Joined: 02/15/2012
Posts: 369
+1 on probable internal

+1 on probable internal transmission issue. And with 27 years on likely dry/corroded tranny input splines, you may need to gird yourself for the cost of a new input shaft. Has it made it for that long (even with its low mileage) without a rear main seal leak? Go whole hog and have your mechanic replace that (and the oil pump seal, too) while he has the tranny out.

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Konrad

george7941
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Toronto, Canada
Joined: 02/03/2016
Posts: 3
Thanks for all the input. I

Thanks for all the input.

I have neglected the bike over the years and, as a result, it needs a lot of work now. I think I will sell the bike to someone looking for parts.

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1987 R80

khittner
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VBMWMO #8223
Joined: 02/15/2012
Posts: 369
If you're done with road

If you're done with road motorcycles, you probably should sell it. But there really aren't many motorcycles better than a mono-shock R80 for general-purpose road-riding. They aren't worth a lot of money to collectors, but they are great bikes, and a repaired tranny could get you, or someone, through 100K miles worth of good times. Don't part it out; sell it whole to someone who'll give it the use it's capable of with a bit of rejuvenation.

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Konrad

george7941
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Toronto, Canada
Joined: 02/03/2016
Posts: 3
I placed an ad for the bike

I placed an ad for the bike on Kijiji and have had a lot of interest expressed, so it looks like the $2000 I am asking is not excessive.
For the last ten years I have only used the bike in the city for getting chores done. Motorcycles get free parking in Toronto, so that has been a big bonus. For this kind of use a small Honda will do just fine, so that is what I plan to get.
http://www.kijiji.ca/v-sport-touring/city-of-toronto/1987-bmw-r80/113943...

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1987 R80

khittner
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VBMWMO #8223
Joined: 02/15/2012
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$2K Canadian? Jeez, if I

$2K Canadian? Jeez, if I needed a project, I'd be heading east with my pick-up.

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Konrad

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