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1Back to top Go down   Hall Sensor woes? Empty Hall Sensor woes? on Sat Jun 28, 2014 11:15 pm

Rabidchiwawa007

Rabidchiwawa007
Platinum member
Platinum member
Hello everyone,

This is in regards to a 1992 k100rs

Well, everything was great for the last 6-7k miles.  Today, I turned the bike on to warm up while I put all my gear on.  Usually it's idling for about a minute before I take off.  I pulled out of the driveway, began accelerating, and the bike died at probably around 4,000 RPM.  I tried to start it back up, but there was no power.  Still coasting, I turned the key off and back on.  The dash lights came on, but were very dim.  I ended up pulling to the side of the road to check things out.  Once pulled over and stopped, I tried the key again and this time had full power.

I still pulled the battery cover off to check the terminals.  The positive terminal was a little loose but had full contact and was still resistant to me moving it around.  The negative terminal was fine.  So I tightened it up, the bike started just fine, and ran normally all the way home (20 mile freeway ride).  I believe that if the issue was truly the battery, the dash lights would not have come on so dimly like that.

Now, I seem to have terrible luck with Hall Sensors.  I went through two on my old k100, and have gone through one on this k100.  I wonder if this was due to a failing Hall Sensor.

Over the passed couple weeks, I noticed random very slight and instant drops in power that lasted no more than 1/4 of a second.  I figured I couldn't do anything about it till it got worse, and now I'm here!



I recall reading awhile back that the Hall Sensors are quite simple and can be made with elements that are readily available from places like Radio Shack for a few bucks, (using the BMW back plate of course).  I'd be interested in doing this instead of spending another $100 for a used Hall Sensor or $400 for a brand new one.  So, does anyone know exactly what I would need, or have a how-to on making a Hall Sensor?

Thanks in advance!


__________________________________________________
1968 BSA Lightning
1991 BMW K100RS 16v with K1100LT fairing
    

2Back to top Go down   Hall Sensor woes? Empty Re: Hall Sensor woes? on Sat Jun 28, 2014 11:38 pm

RicK G

RicK G
VIP
VIP
A loose battery terminal will do that.


__________________________________________________
"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 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

3Back to top Go down   Hall Sensor woes? Empty Re: Hall Sensor woes? on Sun Jun 29, 2014 2:36 am

Ghost who rides

Ghost who rides
Life time member
Life time member
Or a dicky ignition switch will give a momentary cut out.


__________________________________________________
1986  K 75 C   2nd owner 187,000kms showing .
1987  K100RT  Police repainted, rough and unloved.
    

4Back to top Go down   Hall Sensor woes? Empty Re: Hall Sensor woes? on Sun Jun 29, 2014 3:48 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Sounds nore like a power supply issue than Hall sensor. No power to restart and weak lights says it. Check the battery connections and the earth connections and as said the ignition can go faulty but check the connections first. I would check the battery too for what its worth.

I am not sure of the wisdom of turning the bike on to warm up and then leaving it running. That can also drain the battery as the alternator doesnt charge the battery when you do that so you are actually draining it to keep the engine running. If the battery is poor this can drain it quickly. It would seem to be a case of fire up and ride off.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska 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 100,380 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell No 33,600 miles
    

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