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1Back to top Go down    No Drive to rear wheel on Fri Dec 04, 2015 12:51 am

K100LT Notts

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Was 160 miles from home, gently exiting roundabout and suddenly no drive in any gear to rear wheel - drifted to halt. Pushed it off the road and called AA, They have delivered it home to Nottingham. Crying or Very sad

There was no mechanical noise and rear wheel rotates very smoothly as if not connected to anything. The gears appear to change.

I have recently replaced drive shaft spines.

I am proposing to have winter project of working forward from the back towards the engine to find the problem. Any likely culprits?

    

2Back to top Go down    Re: No Drive to rear wheel on Fri Dec 04, 2015 2:49 am

JR_K100RS

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G'day Notts ,
I've found myself in the same situation on two occasions , 1st was a stripped out centre spline on the clutch plate , 2nd was a stripped spline on the diff end of the drive shaft . If you have recently looked at the drive shaft take a look at the clutch plate

John Re


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Diamond Grey ( 617 ) 1987 K100RS ( European Delivery ) Original owner
    

3Back to top Go down    Re: No Drive to rear wheel on Sat Dec 05, 2015 6:15 am

Holister

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I'm no expert in this area but from what I've read on this forum, I would imagine that if it were the splines you would have quite a bit of noise. With the symptoms you describe I'm guessing the clutch pressure plate.
How does the clutch lever feel?


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1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

4Back to top Go down    Re: No Drive to rear wheel on Sat Dec 05, 2015 11:40 am

92KK 84WW Olaf


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Someone near to me on an R [not K] had an issue where his clutch pushrod broke and wedged itself in the tunnel through the gear box when the broken ends tried to ride over each other. Unfortunately he kept riding despite knowing something was amiss and burn out he clutch AND chewed out the side of the tunnel meaning clutch and gearbox were toast. Then a mechanically knowledgeable friend mentioned it can happen that the breaks are not unknown and can wedge inside the tunnel effectively leaving you with a spinning clutch and no drive.

KH mentioned the lack of noise too.....I once heard stripped splines.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 83,150miles
    

5Back to top Go down    Re: No Drive to rear wheel on Sat Jan 09, 2016 9:10 pm

K100LT Notts

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Thanks for your replies.

Today I did the monthly battery charge and engine warm up that I do in the winter.

I took the opportunity to look in the gearbox through the gear oil fill hole. I can see some gears with an inspection lamp. When the engine is running and a gear is selected the gears rotate and stop rotating when I apply the clutch. The speed of rotation also changes depending on which gear I select. This leaves me to conclude that the problem is after the gearbox.

I hope this means less dismantling as the problem will be drive shaft or final drive - both easy to get to. A great relief.

    

6Back to top Go down    Re: No Drive to rear wheel on Sun Jan 10, 2016 5:08 am

RicK G

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Certainly sounds like a well worn drive shaft spline. Winter is the time to pull the shaft out and send it off to Motobins for a new spline.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

7Back to top Go down    Found the problem on Tue Apr 19, 2016 12:01 am

K100LT Notts

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Now that the weather has warmed up, I stripped from the back end and found a failed drive shaft weld where new splines had been fitted (18 months and 1.5k miles ago)

https://plus.google.com/108070380341695510358/posts/CkReJnkKPjz

Motobins immediately agreed to look at it and repaired it quickly. Many thanks to them. Very Happy

It is now back on the bike and it is all ready to go.

I think the cause of the failure was the new splines being slightly loose meant that the weld took all the vibration and shock loads making it crystallize in short order.

At least it was easily fixable and not buried deep in the motor Very Happy

    

8Back to top Go down    Re: No Drive to rear wheel on Tue Apr 19, 2016 6:17 am

K75cster

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Well that will surely do it, Hope this weld holds for much longer


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

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