BMW K bikes (Bricks)

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1Back to top Go down   Earth Point Empty Earth Point on Thu Mar 28, 2013 11:48 pm

Alheng

Alheng
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I keep reading about moving an earthing point further back, when I was researching about tank removal. Can some one explain, I don't see any earth points under my tank.

    

2Back to top Go down   Earth Point Empty Re: Earth Point on Thu Mar 28, 2013 11:54 pm

rosskko

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If you have your tank off look for the brown wires.

They all go to a point on the frame. About mid way down the tank.


__________________________________________________
1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

3Back to top Go down   Earth Point Empty Re: Earth Point on Thu Mar 28, 2013 11:56 pm

RicK G

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About half way along the top tube on the left side, under the tube, it's a socket head or 10mm head screw with about 5-6 brown wires going to it.


__________________________________________________
"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   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 1:11 am

charlie99

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never heard of mooving the earth point al ...maybe i misssed something

it would be good practice to remoove all the eye terminals from the bolt nut arrangement periodically and clean up all those terminals though (lots of suggestions for cleanup proceedures throughout the forum )


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

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

5Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 1:17 am

Alheng

Alheng
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Right, I've found it.

Next question - Why? The reason is not apparent to me yet.

    

6Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 1:31 am

rosskko

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@Alheng wrote:Right, I've found it.

Next question - Why? The reason is not apparent to me yet.

Why is it there or why would you clean it?

Cleaning is important to keep all the bits working properly. Due to the location it is easy for dirt and crud just to accumulate and destroy the earth for most of the elektrickery bits.
Just undo the bolt. Count the number of wires to make sure they ALL go back and give them a rub or wipe with a cleaner. Check the bare metal on the frame is clean then screw it back up.

Why is it there and not somewhere else? Ask the Germans.


__________________________________________________
1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

7Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 2:27 am

charlie99

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rossco wrote:
@Alheng wrote:Right, I've found it.

Next question - Why? The reason is not apparent to me yet.

Why is it there or why would you clean it?

Cleaning is important to keep all the bits working properly. Due to the location it is easy for dirt and crud just to accumulate and destroy the earth for most of the elektrickery bits.
Just undo the bolt. Count the number of wires to make sure they ALL go back and give them a rub or wipe with a cleaner. Check the bare metal on the frame is clean then screw it back up.

Why is it there and not somewhere else? Ask the Germans.

the earth point near the steering head is verry wise idea ....electrickery when it draws current arcs in on a intermittent metalic contact point ....like steering head bearings ...etc this action pits the metal surfaces ...and we dont want that ...do we ?

this is a well known issue in many bikes

besides it gives a good earth reference for all those important ecu stuff ...without a big long cable that may get crushed etc ...heading back to the battery ...dont forget the altenator mounting points are pretty close to the rhs frame mount ..so electricall a short path to the rest of the wiring hookup stuff

so ..... hope that helps


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

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

8Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 8:10 am

Alheng

Alheng
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The cleaning I understand and it looks like there is no need to move it. Cheers!

    

9Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 8:43 am

blaKey

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I believe that moving the earth point is in reference to removing the tank...to be precise, moving the earth point to allow you to just move the tank out of the way instead of disconnecting and removing the whole tank.
It goes hand-in-hand with lengthening the fuel hoses.

Or I could be totally barking up the wrong tree! Shocked


__________________________________________________
Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

10Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 8:56 am

Alheng

Alheng
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I thought it was too but it's not connected to the tank in any way.

    

11Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 10:01 am

RicK G

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There are some K100 and a few K75 that have or usually had an earth strap from the frame to the tank apparently it was put there on the police bikes to prevent static interference on the two way radios. This could be the earth that is being refered to.


__________________________________________________
"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
    

12Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 10:06 am

Alheng

Alheng
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Ah so!

    

13Back to top Go down   Earth Point Empty Re: Earth Point on Fri Mar 29, 2013 3:05 pm

charlie99

charlie99
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must have had a mental block out ...yes i had to remoove seaniis earth strap when we went in there ...easy put it back on if you fit it up with a 5mm speed nut other wise the nut on the inside is a pita to remoove and replace ..


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

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

14Back to top Go down   Earth Point Empty Re: Earth Point on Sat Mar 30, 2013 6:46 pm

K-BIKE

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Rick is right on the money there the Police bikes did have an earth strap which made it a pain to remove the tanks if you keep it just modify it to a pull apart spade connector.
Regards,
K-BIKE

    

15Back to top Go down   Earth Point Empty Earth Point on Sun Mar 31, 2013 7:23 pm

Tom KSR

Tom KSR
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G'day All, When the tank was off ,I removed all the earth connections.I bolted a bar to the frame and ran a new cable from the bar to the neg.side of the battery.Then I reconnected all the earth wires to the bar.I also ran a cable from the neg.side of battery to the bolt securing the starter motor. All this to prevent any earthing problems.Sorry to bore you with this stuff which was picked up on previous posts. Cheers Tom

    

16Back to top Go down   Earth Point Empty Re: Earth Point on Mon Apr 01, 2013 4:45 am

92KK 84WW Olaf

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Alheng/RickG/Blakey

I put up a post about lengthening the fuel lines and moving the earth point back.

I have an earth on the left side of the tank and yes mine is an ex police bike. I did not increase the length of the earth, just moved it back because it then allowed the tank to be raised and moved back without disconnecting it. One could lengthen it but then its one more thing to get tangled if it is too long. There are some more earth points further back but I found one on the left side that allows the tank to be lifted up enough to leave clear access to the electrical box without any disconnection.

The fuel lines on my bike were perished and BMW sold me a 1m length of fuel line to cut to length. The lines on the bike looked perfect but after a couple of tank removals I realised there were well perished. So, with the new fuel line I made them longer, again to allow the tank to be lifted up and back to allow clear access to wiring under the tank and the coolant refill above the radiator.

Of course this also allows clearer access to check any electrical connections under the petrol tank without taking anything apart.

It also means if I do have to remove the tank it is easier to move it back and get clear access to the fuel line clamps and the frame end of the earth rather than fiddling inside the LT fairing with flexible socket drives............

92KK


__________________________________________________
1992 K100LT 0193214 Bertha Alaska 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 105,200 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell Now 36,188  miles
    

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