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Old 05-24-2014, 03:16 PM   #1
AKjeff OP
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R80G/S Pannier Rack on an R100GS Subframe?

I've got an R100GS subframe that I plan to install on my R80G/S.
Will my R80G/S pannier rack bolt on to the R100 subframe?

I'm planning the work now while I'm at work, I'll be home in a couple weeks to prep the bike for a trip. If the pannier racks won't bolt on to the R100GS subframe I won't spend the time putting the subframe on the bike before the trip.
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Old 05-24-2014, 09:54 PM   #2
elmontanero
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Good news is… it only takes a little time to switch the subframes. Bad news is Mine would not fit the pannier racks once I switched them. The R100gs rack is quite a bit longer - and I needed to use the R100gs Fender to fit - sort of - had to cut the forward end of it off otherwise it contacts the tire.

I was looking for a frame that was more stout and went with the R100gs frame - and so bought a Happy Trails rack to fit it.

Someone else might have more info with your Specific Pannier Rack to fit.
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Old 05-24-2014, 11:04 PM   #3
Mark Manley
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They can be made to fit with some modification, it could be worth advertising on here for a swap with somebody who has GS frames and wants G/S.

You will find that the G/S silencer is shorter than the GS one and might scorch the mudguard,
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Old 05-25-2014, 10:30 AM   #4
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Thanks for the info. I did compare the muffler part numbers and see there is one more hanger on the GS muffler as well. I will probably put a low exhaust on the bike temporarily while I sort things out.

I wasn't aware that the 100 fender would hit the tire on the 80. That makes sense.
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Old 05-27-2014, 08:08 AM   #5
SOLO LOBO
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The GS muffler works fine, I've been running one on my G/S for years with no issues.

Ther GS ang G/S rear rack and seat mounts are very different, you'll want to get the proper GS bits
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Old 05-27-2014, 08:24 AM   #6
Skyshadow
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I had the entire GS conversion on my G/s once but found it made the bike look disproportionate. It also added a lot of weight over the rear. While a lot of options were opened up.....I felt the modification was not worth it and went back to the g/s setup.

In the future I may find a local honest welder and have a stronger rear frame made up.
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Old 05-27-2014, 09:55 AM   #7
Beemerguru
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I do the GS subframe conversion on the the G/Ss I build with extended swingarms. Extra weight, length and different mounting points. The GS and G/S racks are very different too.

I have sets hanging on the wall if you want to talk about a swap.
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Old 05-27-2014, 12:20 PM   #8
Skyshadow
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Quote:
Originally Posted by Beemerguru View Post
I do the GS subframe conversion on the the G/Ss I build with extended swingarms. Extra weight, length and different mounting points. The GS and G/S racks are very different too.

I have sets hanging on the wall if you want to talk about a swap.
IMHO...the extended swing arms are necessary to deal with the poor symmetry imposed by just a subframe swap. Then there is the slight torquing you have to do to get them to bolt up......
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Old 05-27-2014, 03:58 PM   #9
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Quote:
Originally Posted by Skyshadow View Post
poor symmetry imposed by just a subframe swap. Then there is the slight torquing you have to do to get them to bolt up......
You know I've heard this said.. never had any trouble with fitting the Subframe from the GS on the g/s, nor trouble with the driving round. I'm a fairly confident mechanic but perhaps a dull rider and didn't notice though

Oh and the other things I thought of
1) Tool tray no longer fits - could be solved easily enough - but wont' just be plug and play.
2) Battery/ side covers don't match up.

The Side Covers from the gs will work with the gs subframe change, I'd assume the tool tray from the r100gs would too but I never bothered to purchase one.
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Old 05-27-2014, 06:13 PM   #10
Skyshadow
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honestly...the torquing is so slight that it's hard to notice. While the g/s frame the bolts drop in...the GS frame needs to be pulled in by hand for the bolts to fit.....that's the extent of it. If no one told me, doubt I would have even noticed.

Only reason I undid the swap was because I hated the symmetry and added weight
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Old 05-27-2014, 09:09 PM   #11
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That's a lot of great info, thanks.

What I really want to do is fit the GS fender so I can use the GS solo seat that fits the GS tank. I figured it would be easiest to swap the subframe too. Of course I also want to have the GS rack with the solo seat...

It never ends, perhaps I should look for a GS.

I have all the parts from my project that hasn't made any progress so I figured I'd swap them onto my G/S until I get back to the project.

I think for now I'll leave it alone and ride it until I have time to really see what fits and works together.
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Old 05-28-2014, 07:55 AM   #12
elmontanero
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My G/S is what sounds like you're thinking of doing. Some pics from last summer. I recently switched it all back to g/s form - hoping to talk my girlfriend into riding. She's not going to do it.




It's really an easy afternoon to put it together. A couple beers and you'll know your answer.
(I have the battery cover panels, just never bothered to put them on. )
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Old 05-28-2014, 08:23 AM   #13
Skyshadow
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perfect...you can kind of see in those photos how the subframe sort of hangs off the back. I would almost imagine that if you loaded it too much on the lee side of the wheel it would induce handling issues.

Like it was mentioned.....easy to do in an afternoon. worst part is the cost.

Heck when I pulled mine apart I even kept the muffler attached and the whole thing came off.
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Old 05-28-2014, 09:13 AM   #14
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Quote:
Originally Posted by Skyshadow View Post
perfect...you can kind of see in those photos how the subframe sort of hangs off the back. I would almost imagine that if you loaded it too much on the lee side of the wheel it would induce handling issues. .
IIRC Airhead Wrangler rode his R80ST with that exact setup to Ushuaia and back with no mention of any handling issues
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your bike is suitably dirty. Well done.
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Old 05-28-2014, 10:23 AM   #15
Skyshadow
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Quote:
Originally Posted by SOLO LOBO View Post
IIRC Airhead Wrangler rode his R80ST with that exact setup to Ushuaia and back with no mention of any handling issues
I know he did....but having the option to load heavier stuff further back beyond the rear wheel axle could lead to issues if you think about it. AH knew how to pack, or didn't expereince the perfect storm so to speak.

I could see a lurker seeing this and dropping a fuel cell back there plus luggage and the balance contributing to an accident. Just putting it out there to think about. I did it...didn't like it
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