I have a 86 k100rt that I have not been riding for awhile, I went to start it and the starter just makes a spinning noise. I thught battery might be low as I have had a low battery relay problem before.. I charged battery for 12 hours at 2 amps and still the starter makes a spinning noise. It sounds like a car starter that spins when the bendix does not kick in but I see in other posts that the BMW does not use a bendix type unit. If that is so then how does the starter engage andd disengage.. Any ideas on my problem.
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k100 rt starter spinning
- Thread starter pfetter
- Start date
kioolt
New member
There's a thread going on now at www.bmwsporttouring.com about this very problem.
http://bmwsporttouring.com/ubbthreads/showflat.php/Cat/0/Number/874921/an/0/page/0#Post874921
http://bmwsporttouring.com/ubbthreads/showflat.php/Cat/0/Number/874921/an/0/page/0#Post874921
pglaves
#13338
The starter is constantly engaged and works through a one way sprag clutch. The starter clutch is slipping so the starter motor just spins and doesn't turn the bike engine.
The maybe fix is to add a product called Valve Medic to the oil (CD2 Detergent also works sometimes, as does Rislone sometimes) to the oil - bump start the bike, and ride a couple of hundred of miles.
That will usually dissolve the gums sticking the clutch sprags. If not it is major surgery to remove the transmission and auxiliary case to access the starter clutch to clean it.
The maybe fix is to add a product called Valve Medic to the oil (CD2 Detergent also works sometimes, as does Rislone sometimes) to the oil - bump start the bike, and ride a couple of hundred of miles.
That will usually dissolve the gums sticking the clutch sprags. If not it is major surgery to remove the transmission and auxiliary case to access the starter clutch to clean it.
K100 Spinning Starter
Thanks for that infor, I looked on the thread you recommended and I will give the motor cleaner a try, this bike has not been ridden much in the last year or so even though the oil has been changed. I think I will see if I can get the spraque clutch loosened up drain the oil, change the filter and then install synthetic oil.
This owners group never lets me down.
Thanks for that infor, I looked on the thread you recommended and I will give the motor cleaner a try, this bike has not been ridden much in the last year or so even though the oil has been changed. I think I will see if I can get the spraque clutch loosened up drain the oil, change the filter and then install synthetic oil.
This owners group never lets me down.
beemer01
Active member
Caution
I had precisely this problem. The CD2 did the trick after riding about 50 fast miles. The PO of my bike probably causde the problem by 1. not riding it frequently, which led to numerous problems related to lack of use and 2. used a generic motor oil.
There are a number of threads about using synthetics oils - I now default to using the $$$ BMW oils.
I had precisely this problem. The CD2 did the trick after riding about 50 fast miles. The PO of my bike probably causde the problem by 1. not riding it frequently, which led to numerous problems related to lack of use and 2. used a generic motor oil.
There are a number of threads about using synthetics oils - I now default to using the $$$ BMW oils.
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