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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: burntstick on September 03, 2015, 07:21:03 PM

Title: k75rt 91 0r 92
Post by: burntstick on September 03, 2015, 07:21:03 PM
really liking my new k75rt although would appreciate advice on spline maintenance .such as how difficult for non mechnic ,necessity and $ for  shop time . shifting advice would also be appreciated , not real smooth yet , torquee in first decelerates rapidly going up and down.thanks heaps
Title: Re: k75rt 91 0r 92
Post by: RobP on September 03, 2015, 07:46:11 PM
Anyone contemplating a DIY spline lube effort for the first time should review Chris Harris' 6-part youtube video series starting at: https://www.youtube.com/watch?v=HZJdZ1HszkA . 

Be prepared for some salty language, but extremely helpful.  The videos include some related repairs that you may need to address on the way. There are also good tips and instructions on this site that you can find with the search function.

This is the first job I tackled on my K100RS because I was not sure of the history.  It needed it. 
Title: Re: k75rt 91 0r 92
Post by: burntstick on September 04, 2015, 11:56:53 AM
thanks for the video Rob , looks like too much 4 me . tell me about the consequences of not greasing splines?
Title: k75rt 91 0r 92
Post by: Elipten on September 04, 2015, 02:29:21 PM
Destroyed splines, bike does not move leaving you stranded on the road. You tow it to shop and either junk or pay large repair bill.
Title: Re: k75rt 91 0r 92
Post by: F14CRAZY on September 04, 2015, 05:04:34 PM
thanks for the video Rob , looks like too much 4 me . tell me about the consequences of not greasing splines?

I suppose it depends on how long you plan to keep the bike...but difficult shifting can occur due to a lack of grease on the clutch splines.

From my understanding, when we K-brick people talk about lubing splines, it's mostly for the trans output shaft, the driveshaft, and the final drive. As I understand it the trans input shaft and clutch disc hub don't suffer from wear and aren't as critical, and take a lot more time and effort to get to, but then again I replaced my clutch disc because the splines in the hub were getting close to shot.
Title: Re: k75rt 91 0r 92
Post by: Scott_ on September 04, 2015, 07:06:37 PM
thanks for the video Rob , looks like too much 4 me . tell me about the consequences of not greasing splines?

I suppose it depends on how long you plan to keep the bike...but difficult shifting can occur due to a lack of grease on the clutch splines.

From my understanding, when we K-brick people talk about lubing splines, it's mostly for the trans output shaft, the driveshaft, and the final drive. As I understand it the trans input shaft and clutch disc hub don't suffer from wear and aren't as critical, and take a lot more time and effort to get to, but then again I replaced my clutch disc because the splines in the hub were getting close to shot.

I'll expand a bit as well,,, for the older monolever bikes 75's and 100's both sets of splines(final drive/drive shaft and transmission clutch input splines) are critical for keeping lubricated properly.

On the later bikes with the paralever drives, the transmission output shaft and the final drive input are both a 'circliped' connection, so lube is only necessary for assembly purposes as when the paralever flexes the shaft movement point is the drive shaft middle spline joint.
BMW also started to build the later transmissions with a harder clutch input shaft(either different hardening process or different material, not sure which), this still requires lubrication, but just not as often as the older ones.
Title: Re: k75rt 91 0r 92
Post by: burntstick on September 04, 2015, 09:00:40 PM
Really appreciate these responses making the new bike sound friendlier.my old yamaha xj650 will be missed
Title: Re: k75rt 91 0r 92
Post by: Tuco on September 04, 2015, 09:01:19 PM
It will shift so much better after you do the service you'll wish you had done it sooner!
Title: Re: k75rt 91 0r 92
Post by: gone_ape on September 08, 2015, 10:25:56 PM
The END RESULT of not taking care of business with your splines....

https://www.youtube.com/watch?v=H7Pdees1ON8