BMW K bikes (Bricks)

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1Back to top Go down   'choke" light coming on Empty 'choke" light coming on on Sun 09 Feb 2020, 05:22

tinyspuds

tinyspuds
Platinum member
Platinum member
Lamp is lit intermittently. Just been thru some deep muddy water. Not really good circs for a proper look. Can be turned off by open and close of lever. Safe to ignore til I get home  - 400 miles?


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

2Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 06:23

Point-Seven-five

Point-Seven-five
Life time member
Life time member
The switch for the "choke" light works off the lever.  It's there to tell you that the throttles are cracked open.  It is not indicative of a problem with the engine.  If the lever is in the closed position, you can ignore the light.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
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
    

3Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 06:26

tinyspuds

tinyspuds
Platinum member
Platinum member
Thanks. 75


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

4Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 06:43

Dai

Dai
Life time member
Life time member
Yah. You've got muddy water up inside the switch plunger holding it in - get a pair of needle-nose pliers (or tweezers) on it and pull it down when you get home, then hit it with the WD40.

'Deep muddy water' is not what I've been hearing....


__________________________________________________
'83 K100 upgraded to K100RS spec, '87 K100RT
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California
    

5Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 06:49

tinyspuds

tinyspuds
Platinum member
Platinum member
The exit road was like a sine wave. The second dip was a foot or so under water but the K beast prevailed. Love this bike.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

6Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 08:15

duck

duck
Life time member
Life time member
@Point-Seven-five wrote:The switch for the "choke" light works off the lever.  It's there to tell you that the throttles are cracked open.  It is not indicative of a problem with the engine.  If the lever is in the closed position, you can ignore the light.

This isn't exactly correct.  The choke light is triggered by a switch on the rear of the throttle bodies when the "choke" is on.  The choke lever pulls on the choke cable which activates the choke device on the back of the throttle bodies. The movement of the choke is what activates the switch, not the lever.

'choke" light coming on K75f_009

Tinyspuds:  The choke light is only an indicator light for the position of the choke device on the throttle bodies.  It has no impact on the fueling or anything else.

You may have just gotten some water in it and shorted it.  Nothing to worry about.


__________________________________________________
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
    

7Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 10:04

Laitch

Laitch
Life time member
Life time member
@duck wrote:The choke light is only an indicator light for the position of the choke device on the throttle bodies.  It has no impact on the fueling or anything else. . . .
That isn't exactly correct, either.

The reason for providing a choke light was that the choke (or idle speed adjuster) does have an impact on performance. If the lever is engaged in one of the two On positions and the throttle is dropped off, the moto will not decelerate fully as expected. That can lead to trouble, especially in corners at low speed. The light was installed as an attempt to help the distracted and/or elderly from launching themselves unexpectedly into guardrails or into free fall at corner apexes, or into car bumpers in traffic when off the throttle turns out not to be completely off.

The problem with that light was unreliability, as tinyspuds has discovered. It was abandoned by the time my moto was manufactured and not described or indicated in the rider's handbook. I'm stuck with relying on memory but, because the longest time I ride with the choke engaged is about ten seconds, I'm able to remember to disengage it. Smile

If tinyspud's moto's engine idle is ok when the light is on, the problem is with the switch/wiring as duck and dai have indicated.

He could put a piece of tape over it.


__________________________________________________
1995 K75 73,000 miles
'choke" light coming on Usa-lo10
    

8Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 10:39

Point-Seven-five

Point-Seven-five
Life time member
Life time member
It was early and I hadn't had enough coffee in me to get into a lot of detail.  I was just giving the 50,000 foot view.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
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
    

9Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 11:21

duck

duck
Life time member
Life time member
@Laitch wrote:
@duck wrote:The choke light is only an indicator light for the position of the choke device on the throttle bodies.  It has no impact on the fueling or anything else. . . .
That isn't exactly correct, either.

Read more carefully please.  I said the switch and choke light have no impact. It is a different component from the actual choke.  If that switch is shorted and the light is on but the choke on the TBs is in off position that has no impact on the fueling. (It sends no signal to the L-Jetronic.)


__________________________________________________
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
    

10Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 11:26

tinyspuds

tinyspuds
Platinum member
Platinum member
Thanks Laitch. No tape needed. Can live with the lamp if it doesn't dry out, just don't want an en route breakdown after a tough weekend.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106. (Not blind to the irony of an April 1 production date).
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

11Back to top Go down   'choke" light coming on Empty Re: 'choke" light coming on on Sun 09 Feb 2020, 11:57

duck

duck
Life time member
Life time member
On K bikes after 1990 BMW did not bother to install a choke switch. (But the connector on the main wiring harness is there if you want to retrofit one.)

If you pull the tank and disconnect the switch at the connector then the light will go out.  It's under the left side of the gas tank.  Yellow and yellow wires to the switch side of the connector with brown and violet/white wires to the main wiring harness connector.


__________________________________________________
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
    

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