BMW K bikes (Bricks)

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timz10000

timz10000
Silver member
Silver member
I have 2 replacement Hall Effect Sensors that I'm going to install on the existing plate. 

My question - if the harness up to the plug under the tank looks OK, is it OK to solder and heat shrink the new sensor wires down by the unit itself? Or should I bite the bullet and replace it all the way up to the plug?

    

RicK G

RicK G
VIP
VIP
I don't see why not just use a good hot iron and do it quickly to avoid any heat getting to the sensors.


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

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 Replacement - need to replace entire harness? Empty Do I need high-temp heat shrink? on Sun Feb 26, 2017 12:07 am

timz10000

timz10000
Silver member
Silver member
Thanks for the help everyone - I love this forum Smile

Another question - do I need high-temp heat shrink inside the hall sensor cover? I sort of assume I do (and the oilhead guy's guide says you do) but just double checking. It's $18 from amazon including shipping and I can't find it locally (or if anyone has recommendations about what stores might sell it...)

    

brickrider2

brickrider2
Life time member
Life time member
I'm not clear on what "high temp" heat shrink tubing is.  I always use heat shrink tubing to insulate wires I solder or otherwise am working on.  I get mine practically anywhere  automotive hardware is sold.  I've got a lot from Harbor Freight Tools too.  
If you are using the installation guidelines that describe swapping the hall sensors on an Oilhead BMW, keep in mind that a K-bike Hall sensors probably never sees the heat the Oilhead does.  On the latter, I understand from word of mouth that the sensors fail more often.  And, a friend who owns a R1150RT found when he replaced his hall sensors, the wiring that carries the signals up to the rest of the loom was fried too!  He replaced the whole lot. I think you should examine that wiring when you replace the sensors, but it'll probably be serviceable.  Good luck!  And, do let us know what you find when you do the work.

    

charlie99

charlie99
VIP
VIP
if I can add something...if you are replacing just the sensors ...maybe with the plate already attached ...but not the connecting cable...and have to solder the cables together ...try using double wall glue lined heat shrink ....it has a 4 to 1 reduction ratio (instead of the normal 2 to 1 ratio )( with heat applied ..and the glue lining will seal out the nasties that exist inside the timing cover .
the rarely noticed  but contributing to failure of the connection cable usually occurs  under the hall effects plate inside the timing cover ...  what I have noticed is that the insulation of the cable deteriorates ..by compression and age ..possibly causing breakover of signal for the hall effects to the chassis earth side ..

be careful how the cables are laid inside there ..and make sure that you do use some form of retension (saddle etc ) of the cable to keep the cable in the right place ...free of crossing cables being crushed and what we call mechanical relief from being stretched or rotated ...un necessarily..

good luck with the job


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OHall Sensor Replacement - need to replace entire harness? Au-log10
    

timz10000

timz10000
Silver member
Silver member
OK cool - I'll just use regular heat shrink (I have a ton), or maybe get some of the glue type mentioned. 

Doing this today, will post pics when I'm done. Thanks everyone.

    

Holister

Holister
Life time member
Life time member
Have you read the detailed instructions on replacing the HES?


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1988 K100RT     VIN No.  0094680
1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
 Hall Sensor Replacement - need to replace entire harness? Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

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