Hi Chris,

Probs not what you were after but came across this when I was looking for a drive box.  Cheap way to modify with std pegs

https://www.kleinanzeigen.de/s-anzeige/fussrasten-versatz-platte-fuer-bmw-k1300r-k1300s-20mm/2608778058-306-16822

Post Brexit,  eBay.de was my default for car bits and Kleinanzeigen for K1300 stuff.

Done a bit of research, the S is higher geared than the R and the GT from what I can make out. Want to keep it that way, planning some tours to euro Gp's. BMW did their usual trick and left a bad design running for way too long (twins had same) , they only fixed this on the 6-cyl and later twins. Problem is that only the inner spindle bearing is in the oil bath, the outer is dry (greased only) and subject to water ingress if the seal fails.  My bike only has 28K miles and I've heard they can go that early. In my case its probably not been helped by a daily 60 mile commute which I did in all weathers, all year around. I also hooned a fair bit on bumpy Irish roads chasing mates on more suitable bikes (Tuonos, Panigales, Pikes-Peak Dukes).  At 28k miles some of the box wont be worn out (backlash feels ok), so going to stick with lower mileage used boxes (if I could find them) or re-build mine.  A K1200 box seems like a retrograde step. If I had time (I don't) would be looking to see if a K1600 box could be adapted, that would be the ideal solution.

By the way Chris, I loved your K1300 Sport, surprised BMW didnt carry that over when upgraded to the K1300 and fixed a lot of legacy issues. Then again, I like mixing and matching BMW stuff, once build for myself an E36 M3 touring. Proper sleeping car that was.

Don't start.... was comissioning some equipment this week. planned to start on Monday am, actually started on Wednesday lunchtime.  Took 1 day to get from Manchester to Dublin, 6 days to get through customs in Dublin.

Cheers,  will try him.  I'm based in Ireland so sending away is PITTA after brexit with all the paperwork and taxes.  Rebuilding isn't really a problem, I'm an ex-automotive engineer, problem with K1300 back end is the need for a specialist puller to get it apart. Bearings and seals are available online.

Returning to fix this as my winter project, day to day since September have been using my KTM SM. Research has shown its virtually impossible to re-build rear box without the special fixture and no one makes replica tools for these. BMW main dealer prices in Ireland are €€€€€ and my feeling is that I will probably cop for a new crown wheel as well as bearings and seals. Probs looking at €1000-1500 to rebuild this which is a big chunk of the total value of the bike. So, has anyone come across a lowish mileage K1300 (must be an s) being broken.  Ebay is hitting a blank, only seems to have 1200's and GT's

Used to make headers years ago and suspect these are made same way, which is why they are a b**ard ro repair.

Effectively the ends of the two pipes are formed into a "D" shape. The "D's" are placed back to back and the 3 sides are weled together. So with the headers vertical you have 2 vertical welds going in the direction of the pipe and a horizontal weld where the 2 D's join. This sub assembly gets pushed into the collector and welded all the way around. As long as the two. vertical welds hit the collector weld you get a seal.  Depending on how they did it the weld actross the back of the D's can be very prone to fatigue cracking. If the ends of the pipe are in line you are blasting a weld onto the edge of the pipe, which is rubbish and will crack.  I offset the D's 3-4mm so that the weld at the end became a lap joint. Also I used robot welding which is more controlled.  BMW's supplier may be using low paid, low skilled manual welders.

Thanks for that info. Disk doesn't appear to wobble but that doesn't say that the hub bearings arent gone. Disk is much smaller diameter compared to the wheel so the 2 theta rule kicks in. Displacement is hugely magnified at the rim compared to the disc. Also the bearing at the wheel side of the transaxle could be the one gone causing the wheel to move but the disc to remain relatively still.  Transaxles and forged wheels are getting rare as the proverbial  hen's does anyone know if there is any part compatibility with later bikes such as the K1600 and GS models. I know some bearings are shared.