Results 1 to 10 of 10

Thread: 85 R80 driveshaft

  1. #1
    Registered User
    Join Date
    Mar 2008
    Location
    Belton Tx
    Posts
    598

    85 R80 driveshaft

    The driveshaft is making a thumping noise as the rear wheel turns. The owner pulled the boot back and reports that the shaft moves about 1/16-1/8 inch side to side at the Ujoint. There is no torsional movement in the joint. What are the options here?
    Ron

    91 K75RT ABS

  2. #2
    Grammarian no, Rider yes ISAMEMON's Avatar
    Join Date
    Jun 2006
    Location
    Kings Valley Oregon
    Posts
    1,718
    rebuild the driveshaft
    youll have to send it out, its not a diy to replace the u-jont
    having rebuilt is about 1/2 new

    or you can get one on fleabay

  3. #3
    Registered User
    Join Date
    Mar 2008
    Location
    Belton Tx
    Posts
    598
    [QUOTE=Isamemon;755733]rebuild the driveshaft
    youll have to send it out, its not a diy to replace the u-jont
    having rebuilt is about 1/2 new

    Anyone recommended? Bruno did my K75-not sure if he does airheads.
    Ron

    91 K75RT ABS

  4. #4
    Administrator 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    13,006
    Quote Originally Posted by roncooper View Post
    Anyone recommended? Bruno did my K75-not sure if he does airheads.
    He should! His website has a picture of an Airhead on it and says "...service for all European motorcycles...". From the website:

    "All BMW K 75, K100 models, All BMW R75/5, R90/6, R100/7, R65, R80RT, R100RS, R80GS, R100GS and all other Airhead models."

    http://www.brunos.us/
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  5. #5
    Registered User
    Join Date
    Mar 2008
    Location
    Belton Tx
    Posts
    598
    The owner called Bruno this morning and he can do it for $200. I guess the next step is getting a spring compressor tool.
    Ron

    91 K75RT ABS

  6. #6
    Grammarian no, Rider yes ISAMEMON's Avatar
    Join Date
    Jun 2006
    Location
    Kings Valley Oregon
    Posts
    1,718
    ok, maybe not enough coffee this morning,
    what do yo need a spring compressor for to ge the driveshaft out ?

    compressing the shocks ? I never have needed any tools other then sockets and wrenches

  7. #7
    Registered User lmo1131's Avatar
    Join Date
    Jan 2010
    Location
    Pismo Beach, CA
    Posts
    3,033
    Henderson Precision did the u-joint on my /5. Highly recommended; quick, and good communicators. $170US

    Here's a good "u-joint rebuild" thread: http://www.bmwmoa.org/forum/showthread.php?t=52180

    Here's what it looked like when I got it back.

    "It is what you discover, after you know it all, that counts." _ John Wooden

    Lew Morris
    1973 R75/5 - original owner

  8. #8
    Registered User
    Join Date
    Mar 2008
    Location
    Belton Tx
    Posts
    598
    We pulled the swingarm in preparation for sending the driveshaft for rebuild. There is no gasket beween the final drive and swingarm, nor does a gasket show on the parts "fische". I think the earlier two sided swingarm gasket would fit.

    Should we do that, or use silicone in the joint? There was some silicone on the bolts, but none I could see on the mating surfaces.
    Ron

    91 K75RT ABS

  9. #9
    Grammarian no, Rider yes ISAMEMON's Avatar
    Join Date
    Jun 2006
    Location
    Kings Valley Oregon
    Posts
    1,718
    true, the newer ones do not have a gasket. but I too put on a smear of silicone

  10. #10
    Registered User
    Join Date
    Mar 2008
    Location
    Belton Tx
    Posts
    598
    He got the driveshaft back from Henderson(looks great) and we put it in Sunday. Everything went smoothly except putting the boot back on. Took more time/effort than it should. He had removed the clip at work using a press and since that was less than ideal, he made a compression tool out of 1by4 wood and ALL THREAD for the install.
    Ron

    91 K75RT ABS

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •