BMW K bikes (Bricks)


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1Back to top Go down    Intermittent Power Issues on Thu Feb 18, 2016 1:23 am

papajhotel

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My K100 has been acting up. Indicators and horn not working sometimes (both riding and engine off), also not starting (but getting a click on starter press), and the headlight not coming on before start.
The weird part is, if I put it in gear and rock the bike back or forward, the headlight will come on and then it will start.
I have had the battery checked at a battery shop, and cleaned the terminals and earth on engine block.
I'm running LED indicators with resistors, and aftermarket speedo, and lights at both ends.


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1984 K100RS
2005 K1200R
    

2Back to top Go down    Re: Intermittent Power Issues on Thu Feb 18, 2016 1:47 am

Waz

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Mine was doing silly things like that and it was the starter motor causing all the electrical gremlins


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1987 K100 RS
1997 R1100R
1996 R1100GS
    

3Back to top Go down    Re: Intermittent Power Issues on Thu Feb 18, 2016 3:49 am

charlie99

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yep agree waz

get the kit ...brush and backing plate (including the earth side brush ) from all the usual places

and do the starter

some fine grit wet and dry can help cleanup the armature .....don't forget to clean off the swarf of copper with some cleaner ...perhaps electrolube ..electrical cleaner ...perhaps even carbi cleaner at a push will get all the garbage out of the wrong places

good luck !


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

4Back to top Go down    Re: Intermittent Power Issues on Thu Feb 18, 2016 4:01 am

papajhotel

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Thanks guys, I new this forum would the fount of all knowledge!


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1984 K100RS
2005 K1200R
    

5Back to top Go down    Re: Intermittent Power Issues on Thu Feb 18, 2016 5:28 am

92KK 84WW Olaf

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Go gently on cleaning the armature, if its left rough it wears out the brushes....Lidl near you? Some of their W5 cream cleaner is as rough as you need.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500miles
    

6Back to top Go down    Re: Intermittent Power Issues on Thu Feb 18, 2016 5:42 am

Chocolate

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This Info "How to" clean the starter could help.
If this is this is the issue.

http://www.k100-forum.com/t2342-starter-motor-cleaning-tutorial

Cheers


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Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

7Back to top Go down    fixed on Mon Feb 22, 2016 2:30 am

papajhotel

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Thanks for the info, and Robmack for the tutorial. All working great now. God knows how long an auto elec would have taken to find the problem!


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1984 K100RS
2005 K1200R
    

8Back to top Go down    Re: Intermittent Power Issues on Mon Feb 22, 2016 3:36 am

charlie99

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nice result


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

9Back to top Go down    Re: Intermittent Power Issues on Thu Mar 03, 2016 4:49 am

Sagi

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I'll hijack this thread as the issue seems resolved, congratulations.

My bike 1990 K75 is giving me some trouble at the moment.

Was on the way to work today, pulled the clutch in preparing to stop at a traffic light. it was a cold morning and the bike not yet warmed up, so the engine died. Usually it starts up again without trouble, but today the dashboard was dead. If I turn the ignition of, the little clock comes on again. but if I turn the key to ON, the clock dies, no lights on the dashboard or headlights and does not start.

Same happened to me a few days ago, parked the bike, went shopping and when I came back 5 minutes later it was dead.

Both times, after 15 minutes without me doing anything other than aimlessly wiggling a few cables, checking the fuses and angrily looking at the bike it starts as if nothing ever happened.

Any ideas on where this mysterious behavious may come from?

    

10Back to top Go down    Re: Intermittent Power Issues on Thu Mar 03, 2016 7:28 am

RicK G

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The fuses may be the problem best at the age of these old stuff is to replace the fuses with new. They dont blow but will fracture where you cant see.
The ignition switch is one of the things to check, with some care you can get them apart and clean then which often solves the problem.
In general loose and coroded connections, use DeoXit it's a good cleaning agent but is a bit expensive but worth it.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

11Back to top Go down    Re: Intermittent Power Issues on Thu Mar 03, 2016 9:12 am

Sagi

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Hi Thank you for your reply. The fuses are all new or max 6 month old and look fine. but will check again. will have a look at the ignition switch again.

    

12Back to top Go down    Re: Intermittent Power Issues on Thu Mar 03, 2016 10:07 am

Point-Seven-five

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Sounds exactly like the problem I had last year with my K75RT. I cleaned what looked like a perfectly clean ignition switch and haven't had a problem since.

For some reason, the designers decided to build an ignition switch that had a very light pressure and marginal travel on the contacts. It doesn't take much to prevent the switch from working. Do a search on K bike ignition switch for several nice photographic tutorials on taking the darn thing apart and getting it clean. One of them is in German, but the photos are very good.


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Present:
1994 K75RT
1994 K75S
1992 K100RS

Past:
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

13Back to top Go down    Re: Intermittent Power Issues on Thu Mar 03, 2016 2:34 pm

Sagi

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Perfect, that looks doable and gives me a place to start

not so perfect, I'm stranded at the office, bike would not start after work and I had to abandon her for the momen, all the angry staring and incessant wiggeling did not have the desired effect, will try again tomorrow

    

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