BMW K bikes (Bricks)

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1Back to top Go down   battery replacement Empty battery replacement Sun May 10, 2015 8:47 pm

cracked canoe

cracked canoe
active member
active member
good afternoon. Happy mothers day to all the moms out there.

it has been a while since my last post. Sorry. 
lets say i am glad to see the last year behind me.

anyway
owner of an 85 bmw k100 rs stock.
95000 k on the odometer.

out for the first ride of the season last weekend and all is smooth
wanted to ride just 35 k to warm up the old girl after almost 2 years of neglect.  
Ended up all all day on the black top and burnt more than a tank of fuel
anyway
a few days later i thought beautiful day for a ride to the office
turn on the switch and pressed the starter -forgot to add the manual choke.
everything off and open the choke. back on with the key and starter
nothing on the start. notta zero
in-fact the display was black- no noise. a few minutes later with the key in the on position the display lights go from black to dim back to black - pulsing between dim and off.
Weirdest thing, it also sounded like the fuel pump also engaged.
anyway.
I believe the start on the trouble shooting would be with the battery.
i am all thumbs with this kind of stuff
first how to remove the battery are there any step by step type instructions (i do have a manual)
and 
secondly what is the best way to check to see if the battery is toast before i either purchase a new one or dive into more trouble shooting. BTW what is a suitable replacement battery. make model for my bike. (pc680?)
as an aside i did have a trickle charged on over the winter and after my day of riding i plugged the battery trickle charge in again (may have been a mistake)
lastly on a un-related note, if i wanted to post pictures or mini videos to attach to future posts how does one go about this?  is it straight forward.  again step by step.  I am sort of a non-handy man and a non computer geek. wanting to learn though.
ultimately i am wanting to perform more and more of my own maintenance and pictures tell a thousand words.

thanks from toronto canada

    

2Back to top Go down   battery replacement Empty Re: battery replacement Sun May 10, 2015 9:36 pm

Rockman

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Life time member
Life time member
Sounds like a loose battery connection or similar to me, not the abttery itself. Could also be the ignition switch or kill switch. Check your battery connections, fuses (not for being blown, but for loose or dirty connections). Try turning the ignition swich on an off a few times to see if its a dirty connection there etc, etc.

    

3Back to top Go down   battery replacement Empty Re: battery replacement Sun May 10, 2015 9:47 pm

RicK G

RicK G
admin
admin
It sure sounds like a bad connection or possibly more than one.
As Rockman says check the ignition switch, it's a good starting point and under the tank there are heaps of connectors that often are corroded and require careful cleaning. Many of the guys here use Deoxit to clean the contacts and connectors.
You can get DeoxIt here http://www.allelectronics.com/make-a-store/item/d5s-6/deoxit-r-contact-cleaner/rejuvenator/1.html


__________________________________________________
"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 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

4Back to top Go down   battery replacement Empty Re: battery replacement Sun May 10, 2015 11:13 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Sounds like your ignition switch.  Your kilometerage is nearly the same as on my K75.  My problems were No power on turn on, low voltage(causing an ABS fault), and worst of all, power dropping out while riding.

Wiggling the key seemed to make the problem go away, which was a good thing when power dropped out at 80mph on the interstate.  Following some instruction posted here on ignition switch service I was able to disassemble the switch and find there were shallow grooves worn into the moveable contact that intermittantly prevented good electrical connection for power to the electrical system.

The fix was pretty easy.  Cleaned the fixed contacts with DeOxit and did a rub of the moveable contact on some 800 grit paper to remove the grooves.  The switch has worked flawlessly now for well over 600 miles over the course of the past 10 days of daily use.  

http://www.eilenberger.net/K75S/IgnitionSwitch/



Last edited by Point-Seven-five on Sun May 10, 2015 11:42 pm; edited 1 time in total


__________________________________________________
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
    

5Back to top Go down   battery replacement Empty Re: battery replacement Sun May 10, 2015 11:25 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
battery replacement <a href=battery replacement Igniti17

The dark lines at 9 and 3 o'clock positions are the very shallow grooves that were causing my problem.  Lightly sanding the face of the movable contact removed them and so far, has cured the problem.  You can see that I had very little dirt or corrosion in the switch.



Last edited by Point-Seven-five on Sun May 10, 2015 11:32 pm; edited 3 times in total (Reason for editing : added text)


__________________________________________________
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
    

6Back to top Go down   battery replacement Empty battery problems gone for now Wed May 20, 2015 11:08 pm

cracked canoe

cracked canoe
active member
active member
So 
removed the battery 7 years old.  can`t ask for much more than that.
took reading (10 v dc)
placed battery on battery charger slow charge 2A
charged up 
took battery to a local shop where they could load test
the shop handles trucks and cars.
battery failed the load test,
long weekend arrived (victoria day long weekend aka may 2-4)
bought a replacement battery 
prepped and changed.
installed tonight and voila.
back on the road.
hoping the old battery was the issues.

thanks Point-Seven-five.
The cleaning tip on the key ignition is awesome
i have copied the link as i feel as though this might come in useful sometime soon.
will keep you posted.
now if only i could figure out how to properly post pics.
my daughter will be home from university soon. she`ll sort me out.

thanks again.

cracked canoe.

    

7Back to top Go down   battery replacement Empty Re: battery replacement Thu May 21, 2015 12:27 am

Holister

Holister
Life time member
Life time member
Good result. Glad to hear its back on the road. Just out of interest.... what battery did you get?

Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  battery replacement Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

8Back to top Go down   battery replacement Empty battery replacement Fri May 22, 2015 10:22 pm

cracked canoe

cracked canoe
active member
active member
so
the battery that was originally in the bike when i purchased it a few years ago was an interstate FAYIX30L
sealed unit
the one I purchased as a direct replacement (size fit and function) was a yuasa model YIX30L

works perfectly so far.  time will tell.

however today my back brake failed.
will be posting on the mechanical part of this forum shortly.

cracked canoe.

    

9Back to top Go down   battery replacement Empty Re: battery replacement Sat May 23, 2015 2:51 am

92KK 84WW Olaf

avatar
Life time member
Life time member
Good to see you....

Back brake on both my Ks went, needed master cylinder rebuild and also a caliper strip. If you are doing a caliper strip as in find that's your problem go the whole way and do the master cylinder rebuild as well. My experience was that the master cylinder will fail shortly after due to the bleeding effort...

My son is due round later...his VFR800 is parked beside my K and he wants to go for a ride....love it.


__________________________________________________
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
    

10Back to top Go down   battery replacement Empty Re: battery replacement Sat May 23, 2015 4:17 am

charlie99

charlie99
VIP
VIP
yuasa is a highly recommended and respected brand out here, for people in the know

they make batteries for many high name - profile company's  "century " and many others (rebranded of course )

good luck  and ride well


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Obattery replacement Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

11Back to top Go down   battery replacement Empty Re: battery replacement Sat May 23, 2015 6:03 am

Holister

Holister
Life time member
Life time member
Specs look good.
I just bought a MotoBatt MBTX30U AGM
If you're in Oz.... Very good price. Very good sevice. Free delivery. http://www.batterybusiness.com.au/


@92KK 84WW Olaf wrote:....
My son is due round later...his VFR800 is parked beside my K and he wants to go for a ride....love it.

Cool Cool


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  battery replacement Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

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