BMW K bikes (Bricks)

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1Back to top Go down   No GPI switch = Neutral Empty No GPI switch = Neutral Wed Dec 11, 2019 3:51 pm

tinyspuds

tinyspuds
Life time member
Life time member
Just want to give my brain something to chew over while I sleep.

Rebuilt and installed clutch last week. While it was stripped I disconnected the GPI switch for cleaning. Inevitably it did a full-on curse of the mummy in my hands, so I have a new one on order. Today, I refitted the tank and started the bike to check that the two seals I replaced were dry. All kicked off ok then ran out of petrol, I topped the tank and the starter turned, engine spluttered and died. After that the starter switch did nothing.

Kill switch is off.

All dash lights are on.

Battery reading at main cable is close to 13v.

No stand switch (sidecar).

No clutch connected (waiting for GPI switch).

EFI connected.

Fuel pump connected.

The starter runs fine from direct connected jump leads.

Starter relay clicks on IGN on.

Got plenty more fault tracing to do tomorrow, but does anyone know what the systems identify as the gear position when there is no GPI switch installed. I’m assuming Neutral as it started once, but can’t confirm through resources.

All troubleshooting logic pretty much starts at ‘is bike in neutral’.

Cheers.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
1986 K100RS in boxes. VIN 0141918.
1954 Royal Enfield 350 Bullet. Original.
    

2Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Wed Dec 11, 2019 8:52 pm

duck

duck
Life time member
Life time member
Connect the clutch switch and pull in the clutch.  That sends 12V to 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
    

3Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Wed Dec 11, 2019 8:58 pm

Dai

Dai
Life time member
Life time member
No clutch switch? Just jump the two wires.


__________________________________________________
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
    

4Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Thu Dec 12, 2019 6:08 pm

tinyspuds

tinyspuds
Life time member
Life time member
Odd, I refitted the cover damaged GPI switch, Indicator showed neutral and it started first press. I have enough other jobs to finish so I’m going to let the old girl keep that mystery to herself. Hope I don’t regret it on the road.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
1986 K100RS in boxes. VIN 0141918.
1954 Royal Enfield 350 Bullet. Original.
    

5Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Thu Dec 12, 2019 9:00 pm

Woodie

Woodie
Life time member
Life time member
Yup, you'll never convince me that our beloved flying bricks are anything other than living, breathing creatures put on this earth to torture us exquisitely.


__________________________________________________
No GPI switch = Neutral Logo2111
1985 K100RT  52667
1990 K75RT 6018570 (project)

"Keep your stick on the ice.  We're all in this together."  Red Green
    

6Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Fri Dec 13, 2019 5:16 am

92KK 84WW Olaf

avatar
Life time member
Life time member
You need GPI neutral OR clutch switch.

Ks are intelligent critturs......if you have no GPI to give you neutral then you need a clutch switch....as said just short out the two wires in the loom plug. 

If its an early K then you can pull out the rear brake switch and use that one, its the same part. Then you can refit the gas tank, to fit a new rear brake switch doesn't need anything off.


__________________________________________________
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 37,190 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
    

7Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Fri Dec 13, 2019 5:17 am

92KK 84WW Olaf

avatar
Life time member
Life time member
You need GPI neutral OR clutch switch.

Ks are intelligent critturs......if you have no GPI to give you neutral then you need a clutch switch....as said just short out the two wires in the loom plug. 

If its an early K then you can pull out the rear brake switch and use that one, its the same part. Then you can refit the gas tank, to fit a new rear brake switch doesn't need anything off.


__________________________________________________
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 37,190 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
    

8Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Fri Dec 13, 2019 7:30 am

tinyspuds

tinyspuds
Life time member
Life time member
Thanks all. Olaf, I'm with you. It would seem to make sense that it needs some positive confirmation of neutral. And all is fine now with the damaged GPI back in til the replacement arrives.
The mystery (which I'm choosing to ignore) is why it started that one time only with neither clutch nor gpi switch.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
1986 K100RS in boxes. VIN 0141918.
1954 Royal Enfield 350 Bullet. Original.
    

9Back to top Go down   No GPI switch = Neutral Empty Re: No GPI switch = Neutral Fri Dec 13, 2019 8:58 am

92KK 84WW Olaf

avatar
Life time member
Life time member
@tinyspuds wrote:Thanks all. Olaf, I'm with you. It would seem to make sense that it needs some positive confirmation of neutral. And all is fine now with the damaged GPI back in til the replacement arrives.
The mystery (which I'm choosing to ignore) is why it started that one time only with neither clutch nor gpi switch.
If you have a 16v you also have a side stand switch.


__________________________________________________
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 37,190 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
    

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