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Old 12-18-2009, 02:29 PM   #1
The Raven OP
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BMW Airhead Buyers Guide

I've been searching the internet high and low for information to look for when evaluating a R80G/S I will be buying this spring. I can't find much other than occasional blips of Info

So, I thought I would start this thread to consolidate things to look when Buying a used Airhead

So I guess the best way to start this, would be a designator a the first line in the post

I'll go first..it would be great if this was a sticky
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Old 12-18-2009, 02:30 PM   #2
The Raven OP
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Bike: 1980-1986 R80G/S
Issue: Weak rear rack and subframe

Rear rack and bags
A known weak spot on the G/S's is the rear sub-frame and rack. Traveling with a lot of weight for a long time will ensure failure of the stock setup. Mostly the frame tubes tend to crack when the bike tips over when fully loaded. With this knowledge, the best solution is to get a custom rear rack and bags designed

Source: http://www.berettaconsulting.com/noh...ages/bike2.htm
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Old 12-18-2009, 04:52 PM   #3
SOLO LOBO
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Quote:
Originally Posted by The Raven
Rear rack and bags
A known weak spot on the G/S's is the rear sub-frame and rack. Traveling with a lot of weight for a long time will ensure failure of the stock setup. Mostly the frame tubes tend to crack when the bike tips over when fully loaded. With this knowledge, the best solution is to get a custom rear rack and bags designed
This is true. Technically it's not something to look for, but looking for a bike with an aftermarket rack system in place is

Other solutions are grafting on an R100GS subframe that is stronger and offers a wide choice of aftermarket pannier racks... My favorite is the Touratech rack that is super strong.

A guy in Germany (Bernard Tesch) makes replacement sub frames that are spendy, but perhaps the stoutest option.....

The options for aftermarket pannier racks for G/S are very limited... motosport, Jesse, Tesch and that might be it.... Hepco Becker is about the same as stock (weak) as may be the motosport ones....
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 12-18-2009, 04:57 PM   #4
SOLO LOBO
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Things to ask if they have been done, or plan on doing yourself:

Exhaust valves guides (perhaps valves) - mine where shot at 21K miles

Transmission rebuild - mine crapped out at 21K... perhaps 45K is "average" for the first rebuild

Timing chain replacement - change if noisey

Assorted top end leaks - no big deal, easy to fix and not too expensive

Charging system - many sides to this potential argument... I am fine with stock parts myself

much more I am sure...
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Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
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Old 12-18-2009, 05:37 PM   #5
bgoodsoil
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first thing I'd do is check ADVRider to see if you can find pics of the PO kicking wheelies on it or bashing it around Mexico.

I guess what I'm trying to say is 'don't buy my bike'
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Old 12-18-2009, 06:06 PM   #6
Airhead Wrangler
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Quote:
Originally Posted by bgoodsoil
I guess what I'm trying to say is 'don't buy my bike'
Steer clear of mine too...

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Old 12-27-2009, 09:30 AM   #7
Lee Keller King
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How about starting with something like this:



I don't know much about BMWs, but this one is pretty and its only $3,600.

Just asking,

Lee
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Old 07-09-2010, 01:51 AM   #8
Padmei
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So Raven have you ended up finding one?
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Old 07-09-2010, 05:08 AM   #9
Lornce
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Save yourself a bunch of trouble... buy a KLR.


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Old 07-09-2010, 12:05 PM   #10
Cordless
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Raven Redux

Raven ended up with this dead stock '81 g/s for under $4K. It has a new top end rebuild, a strong tranny, a dodgy electrical system (as it turns out), and a fresh rear main seal.



Raven flew to NM, spent five days changing the rear main (twice) and other prep work, then rode it home to Maine.

Read about it here: http://www.advrider.com/forums/showt...light=gretchen

I know all this because I sold Gretchen (the g/s) to him.

It's OK because I have another '81 g/s (Rosko) in pieces waiting for me out in the shop.
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