Failing hall sensor plates are probably the most common cause of spark & fuel suddenly disappearing on the R1150, R1100 & R850 series BMW’s. It’s a problem that happens without warning and could disappoint you at any time, hopefully close to home.
The function of these sensors is to supply a signal to the Engine Management System when each cylinder reaches Top Dead Centre and therefore indicates to ECU when to regulate ignition (spark) and fueling.
The reason why this component fails is because of the poor quality communication cable on the unit that can’t resist the heat of the engine.
The solution to this problem is to replace the cable with a high heat resistant communication cable as seen on the image below done by Covenant Motorcycles.
The hall sensors themselves hardly ever malfunction but should still be tested when the communication cable is replaced.
The cost to refurbish a hall sensor plate @ Covenant Motorcycles is R1300
If the hall sensors need replacment aswell its R500 Per hall sensor.