tommydog
Registered user
Just wondered if anyone knew if it was possible to do a rear disc brake conversion on an r80 g/s and while at it fit tubeless tyres?
r80 g/s - rear disc brake conversion?
- Thread starter tommydog
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You'd need to replace all rear ( from gearbox ) with R1100GS....lot of work.
Didn't the R100R come with a rear disc brake? I guess you could convert the bike to paralever but as Kenny says it's a lot of work. Why do you want a rear disc anyway?!
Probably better off to sell the G/S and buy a GS airhead - or even better a GS oilhead
Probably better off to sell the G/S and buy a GS airhead - or even better a GS oilhead
tommydog
Registered user
It's not something I definitely intend to do, just inquiring as to what is involved.
Is it not possible to keep the MONOLEVER and have a rear disc?
Is it not possible to keep the MONOLEVER and have a rear disc?
I'm still running standard brakes on mine but my advice would be, keep the rear as a back up, objet d'art, and, if you want to improve the stopping power, get a larger disk conversion kit, and/or add a second disk and new master cylinder.
That way, you keep the original looks but are able to stop when you want.
That way, you keep the original looks but are able to stop when you want.
tommydog
Registered user
I completely hear what you say tufty, but from a hypothetical perspective what would be involved to convert the back to disc and keep the MONOLEVER? Has anyone ever done anything like this?
I've never seen one, but if you manage it, can I have your old wheel?
Beemerboff
Registered user
The Becks cafe racer R90 a few posts down looks like it has a monolever with a disk.
At the price you would probably be as cheap buying the bike just to get the conversion - the bike is a give a way considering the work that must have gone in to it.
At the price you would probably be as cheap buying the bike just to get the conversion - the bike is a give a way considering the work that must have gone in to it.
tommydog
Registered user
But that is a R90, not much good for me as I need good offroad performance as I want to do a bit of touring over rough ground in Africa
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Ah, you never mentioned that ! 
Buy a Honda
Seriously, if you don't already have a g/s........
http://www.ebay.co.uk/itm/BMW-R80-G...URE-BIKE-BOXER-PARIS-DAKAR-ETC-/321910677909?
Buy a Honda
Seriously, if you don't already have a g/s........
http://www.ebay.co.uk/itm/BMW-R80-G...URE-BIKE-BOXER-PARIS-DAKAR-ETC-/321910677909?
They've changed the final drive for a k series one. To do that you have to use the k series wheels (as they have)
I'd imagine that offset would be a problem - I like the rear drum on my g/s lots of feel and it provides ample stopping power. 'Ample' that's a good word to use when discussing Airheads
I'm by no means an expert on such things but I was lead to believe that the drum setup was more effective than the rear disc?
The only real advantage of a disc on the rear is ease of maintenance. Under hard braking, given the vastly reduced load on the rear wheel due to weight transference, it'd be a particularly pathetic rear drum which couldn't provide more braking than the tyre has grip. Having said all that, I understand (and I use the word loosely!) that sometimes the off-road gods use the rear brake to break traction and a disc might well be better for that.
Or one might just fancy the 'trick' appearance of such a thing and I'm certainly not in a position to criticise that...
It'd certainly be an interesting project though - I look forward to the thread!
Ah, you never mentioned that !
Buy a Honda
Seriously, if you don't already have a g/s........
http://www.ebay.co.uk/itm/BMW-R80-G...URE-BIKE-BOXER-PARIS-DAKAR-ETC-/321910677909?
Seems tidy for the price.
Lots of brass looking fittings on the rear bevel box. Photo 2. Bevel box level plug, shaft filler?
Signature on tank?
White luggage. Much earlier than the bike surely. /7 series?
I'd like to see it with the silicone washed off it. I bet it doesn't look very good then. Looks like a tarted up knacker to me. Would have been £800 not so long ago.
That luggage is early twin shock, painted white and fitted to a crappy Krauser Wing rack that looks like it's been bodged to fit over the exhaust. That pannier will stick out a mile.
At 43k it's just about due for a top end rebuild.
Looks like a tarted up knacker to me. Would have been £800 not so long ago. That luggage is early twin shock, painted white and fitted to a crappy Krauser Wing rack that looks like it's been bodged to fit over the exhaust. That pannier will stick out a mile.
At 43k it's just about due for a top end rebuild.
