BMW K bikes (Bricks)

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1Back to top Go down   Late K100 instrument panel needed Empty Late K100 instrument panel needed Tue Jan 24, 2023 7:19 pm

Dai

Dai
Life time member
Life time member
Kostenlot's instrument cluster has developed a fault - the neutral light was coming on, then slowly dying after about thirty seconds. Now it doesn't come on at all. It's definately not the bulb or the housing: voltage at the positive feed tab is 1.37v and the input voltage (black/green wire) is whatever the battery says it is i.e. 12-13+ volts. Currently I'm pointing the Finger of Doom Possibility at the diode that feeds the light but... you never know. I have three spare early instrument clusters but no spare late one (single fuel warning light). Motorworks have secondhand ones but the price made my pension dissolve into gibbering fear and of course, James Sherlock is just taking the p!ss as usual.

Has anyone on this green and sceptic isle got a spare one that they're willing to part with for a fee, please?


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

duck

duck
Life time member
Life time member
Dai wrote:Kostenlot's instrument cluster has developed a fault - the neutral light was coming on, then slowly dying after about thirty seconds. Now it doesn't come on at all. It's definately not the bulb or the housing: voltage at the positive feed tab is 1.37v and the input voltage (black/green wire) is whatever the battery says it is i.e. 12-13+ volts. Currently I'm pointing the Finger of Doom Possibility at the diode that feeds the light but... you never know. I have three spare early instrument clusters but no spare late one (single fuel warning light). Motorworks have secondhand ones but the price made my pension dissolve into gibbering fear and of course, James Sherlock is just taking the p!ss as usual.

Has anyone on this green and sceptic isle got a spare one that they're willing to part with for a fee, please?

You can replace the gear indicator circuit board with one from one of your spare earlier clusters. It's the same part for all years and models.

https://www.realoem.com/bmw/enUS/showparts?id=0516-USA-07_1986_K589_BMW_K_100_LT_87_0506,0516_&diagId=62_0534#62111459238

How to replace: http://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/gpi/gpi.htm


__________________________________________________
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
    

Dai

Dai
Life time member
Life time member
I was sort-of hoping someone would come along and say something like this. The GPI itself is working fine; it's just the bit of circuit that powers the neutral light that's gone AWOL.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Is the bulb holder properly inserted in the flexi circuit?  Occam's razor and all that.

I've had that problem with the lamps in one of my clusters.


__________________________________________________
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
    

5Back to top Go down   Late K100 instrument panel needed Empty Re: Late K100 instrument panel needed Wed Jan 25, 2023 10:03 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
If it is the gear position circuit board, I have one here that has a bad LCD that I could send for the cost of shipping.  The pond is in the way, so it might take a week or two.


__________________________________________________
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
    

6Back to top Go down   Late K100 instrument panel needed Empty Re: Late K100 instrument panel needed Wed Jan 25, 2023 12:17 pm

duck

duck
Life time member
Life time member
Point-Seven-five wrote:Is the bulb holder properly inserted in the flexi circuit?  Occam's razor and all that.

I've had that problem with the lamps in one of my clusters.

The same circuit sends power to the start button when in N.

Does the bike still start in gear 0 when the clutch lever isn't pulled in? (Pulling in the clutch lever is the other source of power for the start button.)


__________________________________________________
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
    

Dai

Dai
Life time member
Life time member
Fixed. I had a GPI board with a knackered LCD display so I indulged in The Great Swaparound. Then swapped the pcbs back again just to be sure, to be sure. Thanks for the pointer Duck.

It's a new wiring loom that's being bench-tested before fitting to the bike, so my first reaction was that I'd done something wrong. It was only after I was absolutely certain it wasn't a fat-finger job that I suspected a pcb failure somewhere.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

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