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1Back to top Go down   Advice on spline conditions  Empty Advice on spline conditions on Sun Feb 18, 2018 4:52 am

Matthew-Brisbane

Matthew-Brisbane
Life time member
Life time member
Hello All

Finally allowed back into the shed to start the spline lube and GPI replacement on the 86 K100

I have never done a spline lube on a k before and tried to educate myself as much as I could before starting

everything has gone really well until, checking the condition of the existing rear coupling spline  ( not sure what the actual correct term is )


To me the coupling spline looks like there is a major flat spot before or after the peak not sure what way the coupling splines spins  



Advice on spline conditions  Dsc_0011


Advice on spline conditions  Dsc_0010

    

2Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sun Feb 18, 2018 5:20 am

Crazy Frog

Crazy Frog
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Embarassed Embarassed Embarassed Embarassed
The shaft is definitively gone.
Do a good cleanup of the splines on the final drive and take another picture. It maybe salvageable.
However, replacing both would be recommended but it's very expensive.


__________________________________________________
Advice on spline conditions  Frog15Advice on spline conditions  Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

3Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sun Feb 18, 2018 6:16 am

RicK G

RicK G
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VIP
The shaft has had the fritz for sure and the splines on the drive aren't much better.
The shafts are easy to fix but expensive and new are eyewateringly so.
The only place I have heard of that fixes the drive is Bruno's in Canada but I am sure that there are many engineering places in Australia that would be able to fix it.
If the uni joint is OK then buy a replacement spline from Motobins and get it welded in to the shaft. If that is not possible Munich in Perth has new shafts.
https://www.motobins.co.uk/bmw-parts.php?model=K%20Series&bikeref=K100
I do have a Good shaft and drive and an almost new shaft plus a K100 that I got recently that has yet to be inspected.  PM for more details.


__________________________________________________
"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 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

4Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sun Feb 18, 2018 6:43 am

charlie99

charlie99
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VIP
sad to see Mathew

I have a set here almost exactly the same

a second hand bevel box and drive shaft may be the simplest (and cost effective)  fix

and a good reminder to keep the maintenance up on "known to wear" parts

good luck mate


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OAdvice on spline conditions  Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

5Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Fri Mar 30, 2018 8:34 pm

Matthew-Brisbane

Matthew-Brisbane
Life time member
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Well finally completed the spline lube and thanks to RickG for the spare final drive the K can now come down off the work bench 
lol!

Advice on spline conditions  Img_0910

    

6Back to top Go down   Advice on spline conditions  Empty First Spline Condition Check on Fri Apr 17, 2020 10:13 pm

John A

John A
active member
active member
Hello,

I was finally able to do my first spline lube job since I've got a lot more free time for home projects now. I want to confirm that my splines are in okay condition. To me, they looked good and were still a bit wet with lube, but I am well aware of my ignorance in this area. I have attached pictures of them below. I would definitely appreciate some opinions on their condition if anyone has the time. For reference, my odometer reads 81k (miles) and stopped a couple of thousand miles ago, probably something else I'll be able to fix now. 

Thank you,

Advice on spline conditions  04152010
Advice on spline conditions  04152012
Advice on spline conditions  04152011


__________________________________________________
1985 BMW K100RT Vin: 0051738 (old style tank)
1982 Suzuki GS650GL
    

7Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sat Apr 18, 2020 12:47 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Those are some of the best photos I've seen posted of splines.  The splines are clean and the light emphasizes the flat at the top of the spline and the ends as well.  Very nicely done.

As far as the condition, they look new to me.  I don't see any wear.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

8Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sat Apr 18, 2020 4:50 am

duck

duck
Life time member
Life time member
First post is Z20 splines. John A pic is Z16 splines from 85 and earlier that don't wear nearly as fast.



Last edited by duck on Sat Apr 18, 2020 7:25 am; edited 1 time in total


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

9Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sat Apr 18, 2020 7:16 am

tinyspuds

tinyspuds
Life time member
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John A

 Contrast the crisp straight faces and the flat tops to those in the OP. Very nice.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
1954 Royal Enfield 350 Bullet. Original.
    

10Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sat Apr 18, 2020 10:32 am

John A

John A
active member
active member
Thank you for the feedback. Also, I had no idea that there were different splines after 85 and I got one that'll wear slower. I was worried a bit before because I'd had some false neutrals building and was hoping it wasn't the splines that caused it. Next up on my service side will be all the oil changes, and clutch line adjustment to hopefully cure that issue. I have been preloading the shift lever and that does make it shift better, but I think there might be a bit more going on. That or I'm just a worry-wort about my bike.


__________________________________________________
1985 BMW K100RT Vin: 0051738 (old style tank)
1982 Suzuki GS650GL
    

11Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sat Apr 18, 2020 11:28 am

duck

duck
Life time member
Life time member
False neutrals on downshifts are a symptom of the transmission input splines (not drive shaft splines) being dry. It doesn't mean that the transmission splines are worn. (Yet. But they will wear quickly if you don't lube them.)

Add 20-25 grams of LiquiMoly gear oil additive to the transmission gear oil to improve shifting.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

12Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sun Apr 19, 2020 6:16 am

caveman

caveman
Silver member
Silver member
Is there play in the shift lever? grub screw?

    

13Back to top Go down   Advice on spline conditions  Empty Re: Advice on spline conditions on Sun Apr 19, 2020 11:37 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Try pulling the clutch in just a little when shifting.  I have found on my bikes that pulling it all the way in actually makes it harder to shift.  It may be that the input shaft needs to be spinning a bit to facilitate the moving of the gears.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

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