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Thread: 2018 – The Current State of K75/K100 Driveshaft and Final Drive Splines - Repair?

  1. #1
    Registered User drneo66's Avatar
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    2018 – The Current State of K75/K100 Driveshaft and Final Drive Splines - Repair?

    Warning!! This thread contains graphic pictures that may not be suitable for all K-bike loving individuals.

    As I attempt to find a suitable (and reasonable $) repair for the splines on a K75RT driveshaft/final drive, I’ve come across a lot of older information, so I thought I’d give a current update of where we are today (3/14/2018). Please let me know if I have missed anything!!


    Brand new OEM:
    Buy a new driveshaft (~$365) and a final drive (~$824) from BMW

    Repair:
    Hansen’s BMW in Medford, OR - they repair the final drive only. The base price for new pinion shaft splines ONLY is $220 if you do some disassembly work. On an older final drive (above 30k or so), they will also replace the pinion gear and seals. They also sell a brand new BMW driveshaft with a 2-year warranty (~$330 for driveshaft because of 10% discount w/drive repair).
    Side note: Craig (proprietor of Hansen's) also said that he accepts final drives from BMW and Independent Shops, so if you don't want to tackle it yourself, you can have someone else do the dirty work for you. He tries to get them back out of the shop in 2 weeks or so.

    Bombers Beemers in Durham, NC
    They offer a full rebuild of the final drive with new pinion shaft spline, new drive shaft, clean and reseal. ($989.95 with 1yr/12k warranty - it is noted that the metal in the new drive shaft splines are supposedly better quality than original)


    Used:
    Check the MOA Market place, iBMWR, or eBay
    Check your local swap meet or motorcycle parts breaker
    **I’ve noticed that the quality on eBay has not been the best, as most are used parts with significant wear. You can see that some eBay sellers deliberately choose not to show the actual splines, in an effort to hide their poor condition!!**


    Other repairs:
    MachineService in WI - They only repair the u-joint on the drive shaft, which isn’t generally a problem on the K75/K100
    Oshmo in Van Nuys, CA and Hendersen Precision in Big Oak Flat, CA - Seem to only repair /5 /6 /7 model final drives or u-joints in R100's
    Motobins.co.uk Driveshaft repair - If you're in the UK, you're in luck, they will repair your driveshaft! If you outside of the UK, they will sell you the "collar" (~$77) which contains the new drive splines, but you would need to source a machinist to remove the old splines and add the new Motobins splines.

    Old places no longer providing new/repairs:

    Brand new:
    Ted Porter’s Beemershop and Bombers Beemers sold the Emerald Island (EI) rebuildable driveshaft, but they are backordered for redesign (no known date of when that will be)

    Repairs
    Bruno’s Repair in Canada (closed down last year)







    Side note:
    Grease that no longer is made for lubing the splines:
    - Honda Moly 60
    - Guard Dog Moly grease


    Please don't post any "I have a drive shaft for sale" replies here - that's what the market place is for
    Last edited by drneo66; 03-22-2018 at 02:40 AM.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  2. #2
    Registered User drneo66's Avatar
    Join Date
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    Updated to include Motobin's reply
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  3. #3

    Spline repair

    Quote Originally Posted by drneo66 View Post
    Warning!! This thread contains graphic pictures that may not be suitable for all K-bike loving individuals.

    As I attempt to find a suitable (and reasonable $) repair for the splines on a K75RT driveshaft/final drive, I’ve come across a lot of older information, so I thought I’d give a current update of where we are today (3/14/2018). Please let me know if I have missed anything!!


    Brand new OEM:
    Buy a new driveshaft (~$365) and a final drive (~$824) from BMW

    Repair:
    Hansen’s BMW in Medford, OR - they repair the final drive only. The base price for new pinion shaft splines ONLY is $220 if you do some disassembly work. On an older final drive (above 30k or so), they will also replace the pinion gear and seals. They also sell a brand new BMW driveshaft with a 2-year warranty (~$330 for driveshaft because of 10% discount w/drive repair).
    Side note: Craig (proprietor of Hansen's) also said that he accepts final drives from BMW and Independent Shops, so if you don't want to tackle it yourself, you can have someone else do the dirty work for you. He tries to get them back out of the shop in 2 weeks or so.

    Bombers Beemers in Durham, NC
    They offer a full rebuild of the final drive with new pinion shaft spline, new drive shaft, clean and reseal. ($989.95 with 1yr/12k warranty - it is noted that the metal in the new drive shaft splines are supposedly better quality than original)


    Used:
    Check the MOA Market place, iBMWR, or eBay
    Check your local swap meet or motorcycle parts breaker
    **I’ve noticed that the quality on eBay has not been the best, as most are used parts with significant wear. You can see that some eBay sellers deliberately choose not to show the actual splines, in an effort to hide their poor condition!!**


    Other repairs:
    MachineService in WI - They only repair the u-joint on the drive shaft, which isn’t generally a problem on the K75/K100
    Oshmo in Van Nuys, CA and Hendersen Precision in Big Oak Flat, CA - Seem to only repair /5 /6 /7 model final drives or u-joints in R100's
    Motobins.co.uk Driveshaft repair - If you're in the UK, you're in luck, they will repair your driveshaft! If you outside of the UK, they will sell you the "collar" (~$77) which contains the new drive splines, but you would need to source a machinist to remove the old splines and add the new Motobins splines.

    Old places no longer providing new/repairs:

    Brand new:
    Ted Porter’s Beemershop and Bombers Beemers sold the Emerald Island (EI) rebuildable driveshaft, but they are backordered for redesign (no known date of when that will be)

    Repairs
    Bruno’s Repair in Canada (closed down last year)







    Side note:
    Grease that no longer is made for lubing the splines:
    - Honda Moly 60
    - Guard Dog Moly grease


    Please don't post any "I have a drive shaft for sale" replies here - that's what the market place is for
    I purchased the spline "ends " from Moto-bins. My neighbor cut off the old ( worn-out ) spline ends in the lathe and welded the new parts to the old shaft, ( they just slide in ) Any good machine shop should be able to do this for a moderate price. As a side note. Moto-bins offer an exchange in Britain only, buy will send you the new adapters ( spline ends ) They were about 55 pounds sterling plus shipping. I have done 2 so far. The quality seems very good.

  4. #4
    3 Red Bricks
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    I too purchased a couple ends from Moto bins. I found the quality lacking. They are a loose fit compared to stock. They also do not appear to be hardened.

    They are definitely better than a worn shaft, but not as good as a new shaft from BMW. How long it will last and what kind of wear it will promote on the final drive is not clear.




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