K11 Owners Group

Manhattan Rider · Big Brick Rider Joined: 09 Nov 2009 Posts: 69

I purchased my 1996 K1100LT new and it now has 162,000 miles. The original Halls Sensor started to fail in 2012 with 150,000 miles So I replaced it with a new Bosch Halls Sensor. With only 10,000 miles on the new halls sensor, it failed yesterday on a ride. In this case, the halls sensor has a material failure.

Note that one side of the sensor failed. The white marks appears to be from contact with the spinning rotor. That apparently generated heat causing the plastic component to fail. There is no contact marks on the other sensor, so the rotor is not out of balance. So it appears to me that the failed sensor was riveted to close to the rotor, so it was a manufacturing failure.

Has anyone seen this type of failure before or have a different idea on what caused this failure?

I ordered another Bosch Halls Sensor for Euro Motoelectric out of Denver for $360. I remember a couple years ago a post where someone provided information on replacement sensor parts for a Hall Sensor. Does anyone have this information? I'm thinking about repairing this sensor to use as a spare.
_________________
Ken Krumm
Manhattan, Kansas
2014 BMW R1200GSA
1996 BMW K1100LT
1996 BMW R1100RT
2004 BMW R1150GS
BMW 500,000 Mile Award
2004 Ducati ST3
1974 Norton 850 Commando Roadster
1969 BSA 441 Victor Special

rbm · Posted: Fri Apr 03, 2015 11:15 pm Post subject:

http://advwisdom.hogranch.com/Wisdom/oilhead_hall_sensors.pdf

Procedure is for an R1100 but applies equally to K1100.
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- Robert
1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer

Manhattan Rider · Big Brick Rider Joined: 09 Nov 2009 Posts: 69

New Halls Sensor installed. After a closer look, it appears to have had a short that melted the plastic. Looks like a defect in the sensor. Thanks for the information on repairing the damage Halls Sensor.

_________________
Ken Krumm
Manhattan, Kansas
2014 BMW R1200GSA
1996 BMW K1100LT
1996 BMW R1100RT
2004 BMW R1150GS
BMW 500,000 Mile Award
2004 Ducati ST3
1974 Norton 850 Commando Roadster
1969 BSA 441 Victor Special

Scott_Anderson · Posted: Sat Apr 04, 2015 9:48 pm Post subject:

I can't imagine that the power source would have enough current to generate enough heat to melt that plastic. I'd be more inclined to think that the heat was from friction, but it doesn't look like there is enough left to really tell.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

Manhattan Rider · Big Brick Rider Joined: 09 Nov 2009 Posts: 69

The rotor is not adjustable and goes on only one way. I measured the rotor and its fine. The Halls Sensor plate was flush when tightened down, so it wasn't at an angle. It's possible part of the switch came apart and caused the friction with the rotor. Either way it failed.

I order another magnetic switch to repair the halls. The link in the pdf no longer offer the item. Honeywell no longer makes the part. The only supplier that I found the offers the part is this one. More expensive at $49. However, much cheaper than a BMW Halls Sensor. http://www.bbautomacao.com/home_hall_effect_sensor_cyhme56.html
_________________
Ken Krumm
Manhattan, Kansas
2014 BMW R1200GSA
1996 BMW K1100LT
1996 BMW R1100RT
2004 BMW R1150GS
BMW 500,000 Mile Award
2004 Ducati ST3
1974 Norton 850 Commando Roadster
1969 BSA 441 Victor Special