BMW K bikes (Bricks)


You are not connected. Please login or register

K100-forum.com » Technical, repair and troubleshooting » Other K bricks (K75, K1100, K1) General discussion. » K75 Drive shaft question

View previous topic View next topic Go down  Message [Page 1 of 1]

1Back to top Go down   K75 Drive shaft question Empty K75 Drive shaft question Wed Dec 31, 2014 7:01 pm

Rip Mc Shredder

Rip Mc Shredder
New member
New member
Got a K75 which had a broken shaft but original shaft didn`t come with bike. Someone before me stripped it and the owner wasn`t prepared to pay to repair it .
Anyway, I got a used shaft on ebay some time ago, but didn`t get around to fitting it until today.
My question is, are there different length shafts as mine seems to be too short for the swingarm.
it is 290mm long and doesn`t reach the end of the swingarm when fitted. Too short to connect to final drive.
Any help or wiseass comments gratefully received  Laughing Laughing
Happy New Year and safe riding

Sean

    

2Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Wed Dec 31, 2014 7:16 pm

Crazy Frog

Crazy Frog
admin
admin
What year and last 7 digits of the VIN# for your K75?
The design of the final drive changed over the years (at least the splines count, but don't think the length was modified)

CF


__________________________________________________
K75 Drive shaft question Frog15K75 Drive shaft question Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

3Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Wed Dec 31, 2014 7:33 pm

Rick G

Rick G
admin
admin
AFAIK all the K100 & K75 except the 16v K100RS had the same length shaft. You may have the front section of a K100/K1100 16v Paralever shaft.  The K75 shaft will have about 2.5 inches of splined shaft protruding from the fatter front section where the 16v shaft only has 3/4 inch.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

4Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Wed Dec 31, 2014 7:38 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
I had an idea all K75 were 20 spline. K100 changed from 16 to 20 spline. I think 88KE put shaft and final drive from K75 on to K100LT.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

5Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Wed Dec 31, 2014 7:52 pm

Rick G

Rick G
admin
admin
All the K75 had 20 spline. The 16 to 20 spline change came about Christmas 1985. Santa had 6 white Beemers pulling it that year and they couldn't have a shaft failure at that event.
The Aussies will see the humour or is Rolf of the menu nowdays.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

6Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Wed Dec 31, 2014 8:29 pm

TacKler

TacKler
Life time member
Life time member
Just measured two K75 shafts and the length should be 327mm.  Assume you have the uni-joint fitted to your shaft?


__________________________________________________
Red 1991 K75S
    

7Back to top Go down   K75 Drive shaft question Empty Thanks for replies Thu Jan 01, 2015 10:16 am

Rip Mc Shredder

Rip Mc Shredder
New member
New member
Thanks for all replies 

Vin number 6218657
Reg no F 870 NNO

This bike has 16 splines on gearbox output shaft and 20 splines on final drive 
The shaft I got matches these but is too short at 290mm total length
Have thought about extending it but might cause vibration 

Sean

    

8Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Thu Jan 01, 2015 1:40 pm

charlie99

charlie99
VIP
VIP
sean    are you sure about that ?

as far as I have read in here, all output shafts  from all the gearboxes ,  across all years were 20 spline

might pay to count again   after viewing a few posts in the forum.....there are many ....use the "search" feature  and type in  "drive shaft"  

not trying to distract you from the search and eventual achievement ,,,just pays to be informed about what you are looking for


good luck  !!



Last edited by charlie99 on Thu Jan 01, 2015 2:04 pm; edited 1 time in total


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

9Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Thu Jan 01, 2015 2:01 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
It's an 8th month of '88 standard K75 and as such should have a 20 spline 'shaft.

RealOem.com


__________________________________________________
Patience is something you admire in the driver behind you and scorn in the one ahead.
~Mac McCleary
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

10Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Thu Jan 01, 2015 8:27 pm

Rick G

Rick G
admin
admin
The shaft you have is the front half of a paralever shaft and is easily mistaken as they are a 20 spline on the rear but not as long as a monolever shaft.
All the K75, 100 and K1100 had 16 splines on the gearbox end of the drive shaft.  The 20 spline refers to the rear spline at the rear drive and used to be a 16 spline till about Christmas 1985 when the K100 changed to a 20 spline at the rear drive.
All K75 had a 20 spline rear drive from the day they hit the streets.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

11Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Thu Jan 01, 2015 8:55 pm

charlie99

charlie99
VIP
VIP
apologies bum steer

thanks rick


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

12Back to top Go down   K75 Drive shaft question Empty Re: K75 Drive shaft question Thu Jan 01, 2015 9:17 pm

Inge K.

Inge K.
VIP
VIP
Another difference between the mono and paralever shaft beside the length
is that the monolever is stepped at the rear end after the rubber joint.

The paralever is just one dia at this part, this part is also much shorter on
a paralever ~20-25 mm.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

Sponsored content


    

View previous topic View next topic Back to top  Message [Page 1 of 1]

K100-forum.com » Technical, repair and troubleshooting » Other K bricks (K75, K1100, K1) General discussion. » K75 Drive shaft question

Permissions in this forum:
You cannot reply to topics in this forum