BMW K bikes (Bricks)

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billhutchsat

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[img][/img]My K100 won't move when clutch is disengaged. I was on a ride going about 60mph when all the sudden I lost traction between the motor and rear wheel. Down shifed to a higher gear gave monentary traction to no traction. In first gear when the clutch is disengaged there is slight pull traction at the rear wheel but I have no problem holding the bike stationery with the clutch fulley disengaged and the engine running at any speed. I have done the following with no good indication as to what is causing my loss of traction:
Inspected final drive, driveshaft, transmission, clutch disk, clutch plate, pressure plate and all the splines, all appear not to be the cause for loss of traction. Prior to my loss of traction there was no clutch slippage, no transmission shifting problems, no irregular noise from either the transmission or the motor. The final drive and transmission moves smoothly as they should but I have not disassemble them for close inspection. The clutch plate seems to move properly but something is causing the loss of traction problem. Can I be loosing traction between the crankshaft and the outputshaft???? When I turn the attached clutch plate, I'm sure the crank and engine are also turning.
Any and all suggestion and comments are greatly appreciated and welcome.
Bill Hutchens
San Antonio, Texas

    

Inge K.

Inge K.
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@billhutchsat wrote: Can I be loosing traction between the crankshaft and the outputshaft???? When I turn the attached clutch plate, I'm sure the crank and engine are also turning.
You can loose the traction between the crank and output shaft, if the rivets on the
damper gear is completly gone.
But then you shouldn't be able to turn the crank when turning the clutch housing,
you should hear some crunching noise instead.
But it could also be that some stubs of the rivets gripping, when turning slowly
by hand.

Remove all the screws on the RHS engine cover and swing it out at the rear end,
to examine the rivets.


Need help K100 bike won't move when clutch is disengaged????? Veiv10


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

billhutchsat

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Inge K.
Thanks for your reply..What is your opinion as to probablity of the outputshaft being the cause for the loss of traction between motor and rear wheel. It seems inprobable to me that loose or missing reveits would cause this failure without prior problems or warning signs. However; I am going to check the reveit status asap...
Would and can there be internal outputshaft failure causing loss of traction???? How might I go about testing for internal outputshaft failure????
Bill Hutchens
San Antonio, Texas

    

Inge K.

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@billhutchsat wrote:How might I go about testing for internal outputshaft failure????
If you look at the picture in my previous post, inside the red circle both the gear
and the damper housing at the output shaft is visible.
Rock the clutch housing forth and back, and look if the gear and damper housing
moves in relation to each other.


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

Themason

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If the rivets fail on the output shaft split gear, you loose oil pressure too as the output shaft has to turn to operate the oil and coolant pumps. If the engine has oil pressure when it's running, the output shaft gear hasn't failed. Look somewhere else.

Those rivets only fail on really high mileage bikes, as in over 100,000 miles. I have never seen them fail with fewer than 100,000 miles. Before they go, they get loose and at idle it sounds like rocks being crushed in the intermediate housing. I mean, the bike talks to you loudly when this failure is imminent. After a rivet fails, it usually turns up on the magnetic drain plug, another good warning sign.

With the bike in first gear, you ought to hear the starter turning if you push the bike backwards. Does your bike do this?


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I live in a parallel universe but have a vacation home in reality :arrow:

1984 K-100RS Alaska Blue w/Parelever and 16V wheels.

1984 K-100RS Metallic Madison stock

1986 R-80G/S w/1000 cc engine

2007 Harley Davidson Street Rod Mirage Orange w/XR1200 wheels, Race Tech, True Track, Works Performance shocks

2007 Harley Davidson Street Rod Vivid Black stock

1993-ish K-100/1100RT/LT hemaphrodite frankenbike thingy to be painted satin black from a rattle can eventually
    

billhutchsat

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Themason...
Thanks for your reply. I don't nor do I have signs of loss of oil pressure. My bike is a high mileage bike with 125K on the clock. As mention in my orginal post there were no irregular noises from the engine or transmission prior to loss of traction. If the bike was assembled I think it could be pushed backwards in first gear hearing the starter turn normally. Please elaborate futher on the question"can you push the bike backwards in first gear?"
I guess I'm compelled to examine the final drive and transmission closely. Inital inspection of these units says to me that they are operating normally but something is causing my loss of traction.
Bill Hutchens
San Antonio, Texas

    

Themason

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I just want to clarify; the engine runs and there is oil pressure? Check to make sure the oil pressure light comes on when you turn the ignition on. It should. If it does not you have a burned out bulb. If the oil pressure warning light is on before starting the engine, does it go out once the engine starts? Does the output shaft turn with the engine running?


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I live in a parallel universe but have a vacation home in reality :arrow:

1984 K-100RS Alaska Blue w/Parelever and 16V wheels.

1984 K-100RS Metallic Madison stock

1986 R-80G/S w/1000 cc engine

2007 Harley Davidson Street Rod Mirage Orange w/XR1200 wheels, Race Tech, True Track, Works Performance shocks

2007 Harley Davidson Street Rod Vivid Black stock

1993-ish K-100/1100RT/LT hemaphrodite frankenbike thingy to be painted satin black from a rattle can eventually
    

billhutchsat

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I just found out why my bike won't move. Outputshaft rivets are out of the outputshaft and in the oil pan. I swear there was no irregular noise or faulty motor operations prior to loss of transaction. I'm now in the market for a good used 12 rivet outputshaft that will work in my K100RS. If anybody has one for sale or know where I might get one is greatly appreciated. My e-mail address is billhutchsat@hotmail.com and telephone # 210-662-4086.

Bill Hutchens
San Antonio, Texas

    

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