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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: vesku on December 02, 2014, 04:53:26 AM

Title: does an '89 final drive unit fit an '85?
Post by: vesku on December 02, 2014, 04:53:26 AM

Hi guys,

just before winter storage time my K100RS's final drive started to make strange noise and it feels like something broke in there. Now I've been offered a whole unit at a reasonable price. Only thing is, mine is a 1985 RS and the "new" unit is from a 1989 LT. Am I going to encounter problems? Any other suggestions as to where to go from here?

-V

Title: Re: does an '89 final drive unit fit an '85?
Post by: Inge K. on December 02, 2014, 05:14:50 AM

Then you also must change the drive shaft, as the number of splines is different....16 (old) vs 20 (new).
The change was 02/86.

Title: Re: does an '89 final drive unit fit an '85?
Post by: vesku on December 02, 2014, 05:28:37 AM

damn, I thought I remembered something! Thx.

Title: Re: does an '89 final drive unit fit an '85?
Post by: vesku on December 02, 2014, 05:33:09 AM

is the final drive self repairable, btw?

Title: Re: does an '89 final drive unit fit an '85?
Post by: vesku on December 02, 2014, 07:55:41 AM

Quote from: Inge K. on December 02, 2014, 05:14:50 AM

Then you also must change the drive shaft, as the number of splines is different....16 (old) vs 20 (new).
The change was 02/86.

I got an offer for both a final drive and a drive shaft. With these I'll be ok? The drive shaft is bolt-on?

Title: Re: does an '89 final drive unit fit an '85?
Post by: Inge K. on December 02, 2014, 01:41:59 PM

Could be a idea to first check what you now have, maybe the FD/driveshaft allready have been changed earlier.
The driveshaft is fixed with a snap ring in the front end, a sharp snatch to the rear would release it.

Title: Re: does an '89 final drive unit fit an '85?
Post by: vesku on December 02, 2014, 02:55:30 PM

Quote from: Inge K. on December 02, 2014, 01:41:59 PM

Could be a idea to first check what you now have, maybe the FD/driveshaft allready have been changed earlier.
The driveshaft is fixed with a snap ring in the front end, a sharp snatch to the rear would release it.

Takk, Inge! Will do that.