BMW K bikes (Bricks)


You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   possible bad earth issues Empty possible bad earth issues Sun Oct 21, 2018 5:48 am

Georgej1000

Georgej1000
active member
active member
Hi all, I'm having some issues with the k bike. I'm charging up the battery after a winter in the shed, connect every thing up and she started on the first wind ( I love my  k bike) however the next day i have to charge the battery up again. took it out  of the shed for a short run round the yard and suddenly shes dead, no power and the battery seems to be flat again. but as i connect the charger to the battery in bike suddenly every thing comes back. so at first glance this is a bad earth. I have also put new brushes into and cleaned the starter motor so I don't think the issue is there. the earth strap to the seems to be fine so where else could i have earth problems?

look forward to the your suggestions 

George

    

2Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Sun Oct 21, 2018 6:01 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
It might be a good idea to connect a voltmetre to the battery and to check the voltage at the battery's terminals after a full charge, then charger off/key on, then immediately afterwards, what the voltage of the battery drops to when the starter begins its spin when you press 'go'. Perhaps it's simply a weak cell in the battery, making the batttery appear healthy after a charge but revealing the weakness when a load is placed on it.


__________________________________________________
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

3Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Sun Oct 21, 2018 6:04 am

73MOH

73MOH
Silver member
Silver member
you could try taking the kill switch (behind starter  button) apart and drowning it in contact cleaner

edit.. reread your post... wont be that if you had no accessory power


__________________________________________________
Paul 
1986 K100 RS
1997 K1100LT
2005 KTM990sd
    

4Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Sun Oct 21, 2018 7:16 am

Rick G

Rick G
admin
admin
I would be testing the battery first of all it should read 12.6v after siting for 4 hours after the charger is removed and no less than 10.5 v when the starter is engaged. One other possibility is the ignition switch but my money is on the battery.


__________________________________________________
"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
    

5Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Sun Oct 21, 2018 10:50 am

duck

duck
Life time member
Life time member
Here in the US you can take the battery to an auto parts store and they will load test it for free.


__________________________________________________
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
    

6Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Sun Oct 21, 2018 10:56 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Your battery is probably shot.  If you let it sit in the shed all winter with anything less than a full charge on it it will self discharge and then the plates will sulfate, accelerating the self discharge. 

I have worked in a boatyard, and seen this problem every spring on dozens of improperly stored batteries.  You can sort of make it look good, but it will never be reliable again.

Moral of this story, always put a FULL charge on your battery when you put into storage, and trickle charge for a day once a month during storage.


__________________________________________________
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
    

7Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Sun Oct 21, 2018 9:48 pm

Dai

Dai
Life time member
Life time member
What .75 says. If you store the bike for months at a time, one of these is a good idea:

http://www.oxford-shop.co.uk/cat267_1.htm

Hook it up and forget it. I've got one and it spends most of its time attached to the Bandit.


__________________________________________________
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
    

8Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Mon Oct 22, 2018 8:46 am

92KK 84WW Olaf

avatar
Life time member
Life time member
Dai wrote:What .75 says. If you store the bike for months at a time, one of these is a good idea:

http://www.oxford-shop.co.uk/cat267_1.htm

Hook it up and forget it. I've got one and it spends most of its time attached to the Bandit.

Why not just keep riding it........! That's what happens when you have a K....


__________________________________________________
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 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 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
    

9Back to top Go down   possible bad earth issues Empty possible bad earth issues Tue Oct 23, 2018 4:24 am

Georgej1000

Georgej1000
active member
active member
Hi Guys thanks for the reply's. I had the battery tested and it tested ok but as was mentioned that's not under load.
so today I put the battery back in after a good 12-14  charge all looked good until I hit the stater then all life was gone again. 

one thing I forgot to mention was as I connect the positive terminal there is an audible click from the relay box under the tank. I'm fairly certain its the starter relay. now as I mentioned before ( I think) when I was having this problem I was using a test probe to try to track whats going on. when I touched the test probe to the input side of the starter relay  i get light on the probe as you would expect , but on the negative side suddenly i have power back. suspecting a earth problem and reading another post here about the stater motor brushes being an issue,  I changed them and the problem went away. but I still have a battery problem.

    

10Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Tue Oct 23, 2018 9:01 am

mike d

avatar
Life time member
Life time member
How was the test performed. As Duck mentioned it should be a Load Test. In the UK many Tyre/Battery outlets will load test your battery FOC, on the basis that you will probably buy a new battery from them.

Mike

    

11Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Tue Oct 23, 2018 4:56 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Anything other than a load test on your battery is worthless.  The worst battery will show a full voltage after time on a charger.  The problem is that there is no real power being stored, and the voltage drops almost instantly when any current is removed from the battery.


__________________________________________________
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
    

12Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Tue Oct 23, 2018 8:43 pm

indian036

indian036
Life time member
Life time member
Point-Seven-five wrote:Anything other than a load test on your battery is worthless.  The worst battery will show a full voltage after time on a charger.  The problem is that there is no real power being stored, and the voltage drops almost instantly when any current is removed from the battery.
Mostly true, but at the extreme worst, a battery I tested a couple of days ago showed 6.5V after a day and a half on a hefty charger. Funny, but it wouldn't deliver anything measurable on my load tester!

Smile

Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy ROB the Red Old Bike   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Tom the Triple (now on Historic rego too.)
    

13Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Wed Oct 24, 2018 4:00 am

charlie99

charlie99
VIP
VIP
indian036 wrote:
Point-Seven-five wrote:Anything other than a load test on your battery is worthless.  The worst battery will show a full voltage after time on a charger.  The problem is that there is no real power being stored, and the voltage drops almost instantly when any current is removed from the battery.
Mostly true, but at the extreme worst, a battery I tested a couple of days ago showed 6.5V after a day and a half on a hefty charger. Funny, but it wouldn't deliver anything measurable on my load tester!

Smile

Bill

possible bad earth issues 44271

yep id say stuffed Bill


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

14Back to top Go down   possible bad earth issues Empty Re: possible bad earth issues Wed Oct 24, 2018 7:08 am

Dai

Dai
Life time member
Life time member
It'll make a good paperweight. Maybe one for holding down a workshop manual?


__________________________________________________
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
    

Sponsored content


    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum