Join Date: Aug 2006
Location: Chicago, IL, USA
The damage to the transmission might include the drums, forks and gears.
The dogs on the gears will already show wear but CAN/MAY be rewelded and undercut. But I would trust this only to a very experienced trans company.
Last I checked, the transmission components were not for sale separately and only come as a unit. I would double check with the dealer or online parts place to confirm, though.
No reason the components can't be replaced but BMW just doesn't provide new parts separately.
I had my old yamaha trans magnafluxed, welded and undercut 1-5 and it cost north of $550 total. Figure around that much for the k1200. Less if the trans didn't needed to be rewelded. Add the cost of a used trans and it could get expensive quickly.
Looking on ebay, there's a used 2008 gearbox but they want $1200 for it. No way I'd pay that. highway robbery.
If you decide to go that direction, I have a low mileage (probably 5000) 2006 gearbox from my bike that had no symptoms of slipping out of gear before I took a tumble at a trackday. I could sell that for $500 plus shipping. If you are interested.
As far as keeping or parting it out, I guess it depends how much you love the bike.
'06 K1200R- in pieces
'73 Honda CB500F- slow but fun.
'77 Yamaha XS 750 triple- kinda