BMW K bikes (Bricks)


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1Back to top Go down   no lights no start Empty no lights no start Wed May 29, 2024 1:09 am

mmgee123

mmgee123
active member
active member
(1988 bmw k100) not 100% sure what happened bike was starting and running fine and then i tried to wire up an aftermarket tail light and now suddenly i have no lights when i turn the key and it won’t even attempt to start, i charged the battery and it’s still doing it. any tips?

    

2Back to top Go down   no lights no start Empty Re: no lights no start Wed May 29, 2024 1:10 am

firstle

firstle
Life time member
Life time member
put the old light back on ?

    

3Back to top Go down   no lights no start Empty Re: no lights no start Wed May 29, 2024 6:39 am

Dai

Dai
Life time member
Life time member
You've most likely cross-wired the new tail light and shorted one or more fuses. If the new tail light is LED then it's possible you've fried that as well.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
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 lights no start Empty Re: no lights no start Fri May 31, 2024 1:50 pm

mmgee123

mmgee123
active member
active member
Dai wrote:You've most likely cross-wired the new tail light and shorted one or more fuses. If the new tail light is LED then it's possible you've fried that as well.
i didn’t know cross wiring was an issue, i was testing the different wires by taping them together and trying to use the blinker. it definitely sounds like this is my issue thank you!

    

5Back to top Go down   no lights no start Empty Re: no lights no start Fri May 31, 2024 5:26 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Don't let the smoke escape.
Crying or Very sad


__________________________________________________
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & the 2nd '98 K1200RS
    

6Back to top Go down   no lights no start Empty Re: no lights no start Fri May 31, 2024 11:57 pm

mmgee123

mmgee123
active member
active member
Two Wheels Better wrote:Don't let the smoke escape.
Crying or Very sad
what? lol

    

7Back to top Go down   no lights no start Empty Re: no lights no start Sat Jun 01, 2024 10:06 am

duck

duck
Life time member
Life time member
mmgee123 wrote:
Two Wheels Better wrote:Don't let the smoke escape.
Crying or Very sad
what? lol

Smoke is the thing that makes electrical circuits work. We know this to be true because every time one lets the smoke out of an electrical circuit, it stops working. This can be verified repeatedly through empirical testing.

This phenomenon was originally observed and proven by Joseph Lucas.


__________________________________________________
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
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
    

8Back to top Go down   no lights no start Empty Re: no lights no start Sat Jun 01, 2024 10:42 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
When asked how a man is meant to drive home with often-failed Lucas electrics, rendering headlamps useless, it was reported that Lucas' reply was,

"A gentleman does not motor about after dark."*
-Joseph Lucas, aka The Prince of Darkness

*I did not verify with Snopes.
Wink


__________________________________________________
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & the 2nd '98 K1200RS
    

9Back to top Go down   no lights no start Empty Re: no lights no start Sat Jun 01, 2024 1:24 pm

firstle

firstle
Life time member
Life time member
rubbish

    

10Back to top Go down   no lights no start Empty Re: no lights no start Sun Jun 02, 2024 11:19 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
firstle wrote:rubbish
Yes, Lucas stuff surely is.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

11Back to top Go down   no lights no start Empty Re: no lights no start Sun Jun 02, 2024 12:46 pm

firstle

firstle
Life time member
Life time member
there from the beginning when few knew how to maintain dynamos etc let alone carbide , you are ill informed or just plain stupid 
lucas-1897-inside-cover

    

12Back to top Go down   no lights no start Empty Re: no lights no start Sun Jun 02, 2024 1:07 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
It is honourable you feel the need to defend the company but there is no reason for name calling. 
It is not personal affront. Please restrain yourself.


__________________________________________________
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & the 2nd '98 K1200RS
    

13Back to top Go down   no lights no start Empty Re: no lights no start Sun Jun 02, 2024 1:34 pm

firstle

firstle
Life time member
Life time member
ok , what personal experience have you with a lucas product i maybe able to help , or are you just spreading something you have been told etc . heres another one for you , elvis is alive and living on the moon

    

14Back to top Go down   no lights no start Empty Re: no lights no start Sun Jun 02, 2024 2:02 pm

duck

duck
Life time member
Life time member
Despite all of the grief that Lucas gets, I owned a high mile beater MG while in college and the Lucas electrics were the one thing that never failed.


__________________________________________________
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
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
    

15Back to top Go down   no lights no start Empty Re: no lights no start Sun Jun 02, 2024 4:01 pm

Dai

Dai
Life time member
Life time member
The real problem with Lucas electrics on motorcycles was the lack of a dedicated earth wire. There you have a miserable six volts trying to fight its way back through thick greasy headstock bearings with no guarantee of a good earth connection... add poor maintenance and headlight reflectors that have lost most of their reflectivity through age and no wonder that the available lighting was so poor most of the time. 

It's also the reason why I always add a dedicated earth loop to any wiring harnesses I make, whether there was one originally or not.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

16Back to top Go down   no lights no start Empty Re: no lights no start Sun Jun 02, 2024 6:54 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I never owned a vehicle with Lucas parts, but my son owned an early 70's Spitfire, a brother-in-law owned a couple MGBs and MGAs, and I had a female acquaintance who owned a 1968 MGB in the late 60's.   I watched all of them struggle with starters, generators, ignition coils and voltage regulators, especially voltage regulators that seemed to delight in frying batteries. 

I know my son didn't have a reliable vehicle until he replaced the wiring harness with one he built himself and several of the Lucas components with aftermarket.  Until that point, there were several occasions when I had to tow his non-running car home. 

In fairness, maybe the cars built for the North American market were built with parts manufactured to a lower standard.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

17Back to top Go down   no lights no start Empty Re: no lights no start Mon Jun 03, 2024 1:06 am

firstle

firstle
Life time member
Life time member
no difference in the item just a simple lack of understanding for how things work , its very very common 
cutout
delete duplicates

    

18Back to top Go down   no lights no start Empty Re: no lights no start Mon Jun 03, 2024 6:10 am

Dai

Dai
Life time member
Life time member
no lights no start 44271 That's almost not fair. Add to my list people who used to abuse the adjusting screws to try to get more voltage out of the regulator than it could safely deliver. Result = burnt-out regulator coils. Lucas' automatic regulator was a distinct improvement over the manual one.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

19Back to top Go down   no lights no start Empty Re: no lights no start Mon Jun 03, 2024 9:21 am

Rick G

Rick G
admin
admin
Post WW2 Lucas suffered from the usual problems as did many UK manufacturers in that they had old production lines that were either worn out from heavy use making military stuff or rusty old junk that sat for 6-8 years where as Bosch had new factories because the old ones did not exist any more. The bike manufacturers had similar problems and didn't recover.
I have had several bikes and cars with Lucas electricals and they weren't the best but for the time were mostly OK.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

20Back to top Go down   no lights no start Empty Re: no lights no start Mon Jun 03, 2024 12:32 pm

firstle

firstle
Life time member
Life time member
more volts for the 6v or 12v systems , adjusting the cut out incorrectly will result in damage (over charge)  , which year are we talking and on what ? have you a regulator model in mind which has been altered to this extent . i still run 6 and 12 volt systems dynamo , 6volt lights are a lot better now with the led bulbs but i still run filament as i think it suits the bikes better more in keeping . lucas mag/dyno

    

21Back to top Go down   no lights no start Empty Re: no lights no start Mon Jun 03, 2024 1:45 pm

Dai

Dai
Life time member
Life time member
Sorry Craig - I'm not sure if you're talking to me or Rick?


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
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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