BMW K bikes (Bricks)

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1Back to top Go down   Hall sensors  Empty Hall sensors Tue Aug 16, 2022 4:38 am

Jibe

Jibe
Silver member
Silver member
Hi all been chasing a miss fire that got worse to the point the bike would cut out but fire up once cooled down. Unmistakable symptoms of hall sensor packing up. I've ordered and fitted to the plate  two CYHME56C.
My question is the cable colour of the red black and green is the same configuration as the orginal stock halls ?? Don't fancy smoke bang and no Genie ........

    

2Back to top Go down   Hall sensors  Empty Re: Hall sensors Tue Aug 16, 2022 11:43 am

Laitch

Laitch
Life time member
Life time member
A genie-less bang is the very definition of disappointment. Smile

If you scroll through this Chen Yang data sheet you'll find its wires labeled on the last page; you can then compare them to the labels in the troubleshooting guide here.


__________________________________________________
1995 K75 81,000 miles
Hall sensors  Usa-lo10
    

3Back to top Go down   Hall sensors  Empty Re: Hall sensors Tue Aug 16, 2022 12:11 pm

Jibe

Jibe
Silver member
Silver member
Laitch wrote:A genie-less bang is the very definition of disappointment. Smile

If you scroll through this Chen Yang data sheet you'll find its wires labeled on the last page; you can then compare them to the labels in the troubleshooting guide here.
Thanks Laitch I'm confident now after cross references between new and old. Just the inner me thinking how wrong it seems hooking up the reds to the k100 black cable 😆

    

4Back to top Go down   Hall sensors  Empty Re: Hall sensors Tue Aug 16, 2022 1:25 pm

Laitch

Laitch
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Life time member


__________________________________________________
1995 K75 81,000 miles
Hall sensors  Usa-lo10
    

5Back to top Go down   Hall sensors  Empty Re: Hall sensors Tue Aug 16, 2022 1:32 pm

Jibe

Jibe
Silver member
Silver member
Just fired the old girl up with a nice smooth tick over. The test comes on a run, fingers crossed the problem has done one

    

6Back to top Go down   Hall sensors  Empty Re: Hall sensors Tue Aug 16, 2022 1:41 pm

Jibe

Jibe
Silver member
Silver member
Took a pic before the snip always handy .....looking at your last post I could have made a possible mistake. I've followed my pic and she fired up so it's gotta be right Hall sensors  20220810

    

7Back to top Go down   Hall sensors  Empty Re: Hall sensors Tue Aug 16, 2022 3:04 pm

bad boy

bad boy
Silver member
Silver member
well done, Jibe Hall sensors  112350


__________________________________________________
Cheerz, David

Hall sensors  9438-010

____________________________________________________________________________
1997 Peraves Super Ecomobile: a Kevlar reinforced monocoque with outrigger wheels, seating two.
K100 fork, monolever, headlight, indicators, K1100RS gearbox and K1200RS 589 engine, rear wheel
    

8Back to top Go down   Hall sensors  Empty Re: Hall sensors Wed Aug 17, 2022 7:03 am

Jibe

Jibe
Silver member
Silver member
Test ride done seemed better but unfortunately is still present 😠 looks like the tools need to come out again, anybody had a similar problem after replacing HEF's and still misbehaving??? I'm fairly sure it's electrical as bike performs spot on before it warms up.
Checked coolant temp cold reading on both sides good had another maf tried that the same thing. New NGK leads and plugs, coils tested and seem to be good. Checked earth's all at 0.5 ohms also new injectors. I've got no air leaks but have noticed a blow at the manifold to down pipe but I don't think that would cause my problem. Any advice would be greatly appreciated.

    

9Back to top Go down   Hall sensors  Empty Re: Hall sensors Wed Aug 17, 2022 10:59 am

Laitch

Laitch
Life time member
Life time member
What exactly is the misbehavior, Jibe?


__________________________________________________
1995 K75 81,000 miles
Hall sensors  Usa-lo10
    

10Back to top Go down   Hall sensors  Empty Re: Hall sensors Wed Aug 17, 2022 12:13 pm

92KK 84WW Olaf

avatar
Life time member
Life time member
Issues on heating up in my book would likely relate to coils and plug leads and also possibly plugs. Bear in mind one normally runs tests on coils when the coils are cold. In the days of yore on 70s cars I had not infrequent falures on coils due and distributor caps due to cracking and tracking.

See if you can use a heat test [gloved hand] to determine if you can isolate a faulty cylinder [or two]. Hall sensor fault does not affect a single cylinder but two, either 1/4 or 2/3. Same for coils.

I have not read all the posts but a tight valve will on heating up expand and may then not close fully resulting in loss of compression in its cylinder giving a misfire. I would start at the exhaust valve clearance in the cylinder with the slight blow.

One component that can be affected by heat is the ICU under the headstock.. . . .


__________________________________________________
1992 K100LT 0193214 Bertha 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 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 49,840 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

11Back to top Go down   Hall sensors  Empty Re: Hall sensors Wed Aug 17, 2022 2:45 pm

Jibe

Jibe
Silver member
Silver member
Really thought I would have cracked it with the hall sensors what with new ht leads and plugs. It's starts missing when it warms up and get worse all most violent, the weather was extremely warm when it cut out before changing the halls and started up once cooled. As for heat checking cylinders, quite honestly I don't expect to feel any difference as it clears quickly and back to judder again down the road this is at any rev range past idle. My next plan is to go through all connections and if still the same think about replacing the icu ..... intermittent faults are a pain in the @rse

    

12Back to top Go down   Hall sensors  Empty Re: Hall sensors Wed Aug 17, 2022 4:30 pm

moriarti

moriarti
Life time member
Life time member
Hi Jibe, I had a similar problem baffled me and my mates. Krazy Frog suggested the ICU, fitted a S/H unit solved the problem, the little buggers are responsible for all sorts annoying cockups. Crying or Very sad Crying or Very sad


__________________________________________________
1984 k100 rs red/black VIN  0004449
    

13Back to top Go down   Hall sensors  Empty Re: Hall sensors Thu Aug 18, 2022 3:56 am

Jibe

Jibe
Silver member
Silver member
Thanks for the advice I will check over the bike soon as I get time and look to enquire on a replacement ICU. These things are set to challenge us and part and parcel of keeping a little bit of history on the road

    

14Back to top Go down   Hall sensors  Empty Re: Hall sensors Thu Aug 18, 2022 7:44 am

92KK 84WW Olaf

avatar
Life time member
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Jibe wrote:Thanks for the advice I will check over the bike soon as I get time and look to enquire on a replacement ICU. These things are set to challenge us and part and parcel of keeping a little bit of history on the road
The reason I mentioned the ICU is that I had a similar issue on my K100LT and this was the cause. Unfortunately running tests does not work because it was failing under heat and most tests done cold wont identify that.


__________________________________________________
1992 K100LT 0193214 Bertha 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 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 49,840 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

15Back to top Go down   Hall sensors  Empty Re: Hall sensors Thu Aug 18, 2022 7:55 am

Jibe

Jibe
Silver member
Silver member
Bite the bullet and replace the ICU, trouble is S/H is still years old, we are for ever gonna chase problems but that's part of the fun well sometimes.......

    

16Back to top Go down   Hall sensors  Empty Re: Hall sensors Sat Sep 10, 2022 12:31 pm

Jibe

Jibe
Silver member
Silver member
Getting the hump now ....replaced hall sensors, replaced icu replaced maf new plugs and leads tried another set of coils new ev14 injectors.
Earth's are all good and no obvious air leaks. I think i can rule out ignition all but timing the bike pulls hard right up to the red line when cold. Temp sensor appears to give correct resistances. Ecu plug looks clean. I'm pulling my hair out here any ideas cos I'm officially running out of them

    

17Back to top Go down   Hall sensors  Empty Re: Hall sensors Sat Sep 10, 2022 12:45 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Jibe wrote: Temp sensor appears to give correct resistances.
What are the readings that you are getting?


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

18Back to top Go down   Hall sensors  Empty Re: Hall sensors Sat Sep 10, 2022 2:20 pm

Jibe

Jibe
Silver member
Silver member
The bike has been out for a test run (failed) in the shed cooled down at the sensor was reading 1.6k ran the bike for about 8 minutes I got 420 ohms. I have to be honest I only checked cold resistance before which was at 2.5k

    

19Back to top Go down   Hall sensors  Empty Re: Hall sensors Sat Sep 10, 2022 2:45 pm

Jibe

Jibe
Silver member
Silver member
Just ran it hot 170 ohms fan never cut in. It might be as simply that's its over heating will take a look at the fan relay and wiring tomorrow

    

20Back to top Go down   Hall sensors  Empty Re: Hall sensors Sat Sep 10, 2022 4:58 pm

duck

duck
Life time member
Life time member
What year  and model K?  

(It helps others help you if you put that in your user profile signature.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

21Back to top Go down   Hall sensors  Empty Re: Hall sensors Sat Sep 10, 2022 5:07 pm

duck

duck
Life time member
Life time member
92KK 84WW Olaf wrote:Issues on heating up in my book would likely relate to coils.

I've seen this before on an 85 K100 that ran crappy when it heated up. Swapped in a different pair of coils and the problem went away.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

22Back to top Go down   Hall sensors  Empty Re: Hall sensors Sat Sep 10, 2022 5:21 pm

duck

duck
Life time member
Life time member
Jibe wrote:Just ran it hot 170 ohms fan never cut in. It might be as simply that's its over heating will take a look at the fan relay and wiring tomorrow

Is the temp light in the cluster coming on? That should happen at around 144 ohms or lower. (111 degrees C)

When it gets even hotter (120 C) then the radiator cap should blow. (Just like a car does.)

To test if your cluster temp bulb is working you can ground Pin A3 of the temp relay socket and turn the ignition on. (Violet/black wire.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

23Back to top Go down   Hall sensors  Empty Re: Hall sensors Mon Sep 12, 2022 3:30 pm

Jibe

Jibe
Silver member
Silver member
Well I fired it up today it ran up and the fan kicked in OK. Just can't understand what's going on new plugs leads s/h icu, coils new halls maf also only thing I've not replaced is the ecu. I thinking it's fueling now. The tank is spotless inside with a newish pump and filter along with the coolant sensor. When's its cold it's right on the money just can't understand what's going on I'm at a total loss at the moment any ideas people 🤔 as I'm stuck ..........

    

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