BMW K bikes (Bricks)


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1Back to top Go down   Original RS Battery dimensions Empty Original RS Battery dimensions Tue 26 Jan 2016, 01:18

ConfusedRS

ConfusedRS
active member
active member
Hi folks,

I am struggling to find the original RS battery dimensions, having bought an RS in pieces the battery is missing so I cant measure it to find a replacement that will fit exactly.

Thanks FrustratedRS

    

Chocolate

Chocolate
Life time member
Life time member
Hallo!

The only size you need is the length up to 181mm for ALL Ks, (175mm is standard) the rest will fit anyway.
A modern non acid batterie is always slimmer.

If you are more interested just search in eBay for K75 100 batterie.
My has 18amp and the price was 36€! is from the solar industry.
Lead flowing Battery 181x76x167mm, no more dripping :-)
With acid batteries you only have problems, dripping, maintenance etc.

Cheers


For more info check YouTube! this Danish guy made some nice videos
BMW K75 How to check the battery and generator, and connectors
https://m.youtube.com/watch?v=-RuvmFR60Gc



Last edited by Chocolate on Tue 26 Jan 2016, 02:36; edited 1 time in total


__________________________________________________
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
    

ConfusedRS

ConfusedRS
active member
active member
Thank you chocolate,

Seems Confused is the correct username for me after all Smile

The issue on length and width. You give the width as 181mm (175 Being standard )

The 181x76x167mm, am I correct in assuming that length is longer than width? which means 181 is the length and 167 is the width or the height?

Thanks Smile

    

Chocolate

Chocolate
Life time member
Life time member
You are correct, I did a mistake!

My Batterie
Lenght 181x width 76x hight 167mm


I guess the width can be more than double, there is a lot of free space left.


Original RS Battery dimensions <a href=Original RS Battery dimensions Image31" />


This is a other Batterie from eBay, check the size
http://www.ebay.com/itm/Yuasa-YuMicron-Battery-53030-BMW-K-100-RS-1984-1992-/321985984500?hash=item4af7dc37f4:g:~BQAAOSwFqJWo5Yk&vxp=mtr

Cheers



Last edited by Chocolate on Tue 26 Jan 2016, 02:45; edited 3 times in total


__________________________________________________
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
    

ConfusedRS

ConfusedRS
active member
active member
Thank you ....

    

Rick G

Rick G
admin
admin
I use a Motobatt MBTX30U which is L 166mm x W 126mm x H175mm.  It's a sealed AGM type so wont leak.  The height is about 5mm higher than standard for the K1100, K100 & K75 they also use a smaller battery which is the one Choco said.  5mm higher is very marginal on the screw length and is very difficult so I use some 6mm threaded rod and lock nuts at the base and nylocs at the top.


__________________________________________________
"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
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
If the shops you're searching have cross reference charts, the OEM battery numbers are: full sized lead/acid 61 21 1 459 650. Slimmer sized Gel 61 21 2 346 800. Both will fit K battery trays. The la flaca (slim) version is 19Amp while the L/A el gordo (fatty) is 30Amp.

Other numbers to search for are the 'industry standard numbers' which are 51814 or 51913. In my Aussie RS I use Motobatt's excellent, yellow AGM version of either of these two reference numbers. Its dimensions are: L 183mm (7.2"), W 80mm (3.15"), H 170mm (6.69")


__________________________________________________
Patience is something you admire in the driver behind you and scorn in the one ahead.
~Mac McCleary
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.
    

Chocolate

Chocolate
Life time member
Life time member
Just found a picture of The Batterie tray.
The Kung Long Batterie is a inexpensive non acid batterie.

WP 18-12, 12 Volt, 18 Ah, 167X180X75mm

34.99 US Dollar (eBay South Africa) that's even cheaper then in Germany
http://www.ebay.com/itm/Kung-Long-WP18-12-12V-18Ah-UPS-Battery-/281342287045?hash=item41814e9cc5:g:jGsAAOSw-jhULdM5

You will find better for the Ks, but nothing as cheap and good as the Kung long batterie! :-)

Here you can see the batterie tray in black on the gearbox
Original RS Battery dimensions <a href=Original RS Battery dimensions Image32" />



Cheers


__________________________________________________
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
    

Shep

Shep
Life time member
Life time member
I don't have any dimensions at the moment but caution you on the height of the battery. At one end of the top bracket that holds the battery in place is a small concave indent that also helps secure the radiator expansion bottle. If the battery is even a little bit higher than the original equipment then two things may happen:
1. The long screws inserted in the top metal battery bracket and that thread into the battery tray may be too short.
2. The top of the radiator expansion bottle will not fit snugly into the indent of the bottom of the top bracket that holds the battery in place.
There are workarounds for both of these issues, one being longer threaded rod to replace the existing long threaded battery bolts (already mentioned) . You can also slightly bend the top battery bracket down to catch and secure the top of the radiator expansion bottle.

Shep


__________________________________________________
Model        Production Date/Serial Number
K100RS      1984 July/ (F0040448)
K100RS      1986 Dec/ (H0142581)
    

10Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Tue 26 Jan 2016, 14:48

robmack

robmack
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OEM battery is a Yuasa 53030 (formerly Y60N24-AL-B, now discontinued). OEM battery dimensions are 186mm L X 130mm W X 171mm H.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

11Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Wed 27 Jan 2016, 02:36

ConfusedRS

ConfusedRS
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active member
Thanks to everyone I have narrowed it down to a few suppliers in Cape Town Smile

I only have one more dilemma, since I don't have the original battery I have no idea which side the positive terminal has to be or does this not matter?

Much appreciated....

    

12Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Wed 27 Jan 2016, 04:23

robmack

robmack
Life time member
Life time member
Terminal type and orientation matter.  Positive on the left side of the bike facing forward; negative on the right.

Original RS Battery dimensions Yuaasa%252520terminal%252520config

The black bump is the position of the drainage hole on a wet cell battery, but if you buy an enclosed battery, this will be missing.

Original RS Battery dimensions Yuasa%252520terminal%252520type%25252010

Isometric, front, side and top views of OEM battery terminal post.



Last edited by robmack on Wed 27 Jan 2016, 04:44; edited 1 time in total


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

13Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Wed 27 Jan 2016, 04:37

ConfusedRS

ConfusedRS
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active member
Thank you Robmack Very Happy

    

14Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Wed 27 Jan 2016, 18:49

JR_K100RS

JR_K100RS
Life time member
Life time member
further to Shep's suggestions on how to secure your coolant expansion tack , I fitted an Odyssey PC680 AGM battery , to help secure the tank the suggestion was to simply flip the battery bracket over ( and refit the rubber do dad from the reverse side ) this moved everything about 5mm down ( suggestion was from BMW owners of America site )

hope this helps

John Re


__________________________________________________
Diamond Grey ( 617 ) 1987 K100RS ( European Delivery ) Original owner
    

15Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Wed 27 Jan 2016, 23:47

ConfusedRS

ConfusedRS
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active member
Thanks John Very Happy

    

16Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Sun 24 Mar 2024, 05:28

LifeGuard

LifeGuard
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Silver member
I'm considering buying a MotoBatt MB51814, but according to the specification, it is 183 mm long. Does this length come from the top part of the battery being slightly longer? The measurement of the base shows that a maximum of 181 mm will fit there.


MotoBatt MB51814 specs:

https://www.motobatt.us/documents/Motobatt%20spec-MB51814.pdf

Original RS Battery dimensions IMG-0745-Large

Does anyone use this battery and can confirm the dimension of the bottom part?

http://tchorzewski.net
    

17Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Sun 24 Mar 2024, 07:11

Dai

Dai
Life time member
Life time member
You want the MBTX30UHD. It's slightly taller than OEM which may give a few problems with the tiedown bar where it holds the overflow tank in place. It's not a huge problem to solve; many of us are using that particular battery. I turned the tiedown over which took up sufficient of the gap not to worry about it.


__________________________________________________
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
    

18Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Sun 24 Mar 2024, 07:53

LifeGuard

LifeGuard
Silver member
Silver member
There are many threads on the forum where people write specifically about the model MB51814. I don't want a taller battery.

http://tchorzewski.net
    

19Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Sun 24 Mar 2024, 08:33

Born Again Eccentric

Born Again Eccentric
Life time member
Life time member
This is the one I recently bought (from motorworks). 
The dimensions are good for fitting with the existing securing ironmongery. The price made me choke on my beer, but other than that, a good fit.

Original RS Battery dimensions Img_3011

I have the UHD version on Gretel but it is a bit of a faff securing as it is slightly taller.


__________________________________________________
Original RS Battery dimensions Uk-log10 Original RS Battery dimensions Sco-lo15
                              Paul  Original RS Battery dimensions 905546712

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donor" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

20Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Sun 24 Mar 2024, 08:49

Laitch

Laitch
Life time member
Life time member
LifeGuard wrote:There are many threads on the forum where people write specifically about the model MB51814.
All the posts I've read indicated the MB51814 fits the cradle. Instead being concerned about the Motobatt's fit, consider shopping for a tape measure that reads 183 across that span. Laughing

Personally, I'll be dipped if I ever spend that much on a Brick battery. The one I used for nine years when riding daily until winter never even needed to be attached to a charger—including during winter storage. It was simply put to bed in the Brick with a full charge from riding and then its ground cable was detached from the transmission. The Brick started right up in spring year after year so I bought another two years ago when I didn't want to push my luck any longer. Smile


__________________________________________________
1995 K75 90,000 miles
    

21Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Mon 25 Mar 2024, 00:21

LifeGuard

LifeGuard
Silver member
Silver member
Ok, following up on that post: https://www.k100-forum.com/t4453-battery-recommendation#46987, Motobatt MB51814 battery fits.

http://tchorzewski.net
    

22Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Wed 17 Apr 2024, 23:46

LifeGuard

LifeGuard
Silver member
Silver member
Ok, I finally bought the MOTOBATT MBTX20UHD battery and 3d printed special spacers so it wouldn't "fly around" in the original tray and would have the correct dimensions. I hope that the 320 cold cranking amps is not too much.  Twisted Evil

Original RS Battery dimensions IMG-0888-Large Original RS Battery dimensions IMG-0889-Large

http://tchorzewski.net
    

23Back to top Go down   Original RS Battery dimensions Empty Re: Original RS Battery dimensions Thu 18 Apr 2024, 02:23

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Laitch wrote:
LifeGuard wrote:There are many threads on the forum where people write specifically about the model MB51814.
All the posts I've read indicated the MB51814 fits the cradle. Instead being concerned about the Motobatt's fit, consider shopping for a tape measure that reads 183 across that span. Laughing

Personally, I'll be dipped if I ever spend that much on a Brick battery. The one I used for nine years when riding daily until winter never even needed to be attached to a charger—including during winter storage. It was simply put to bed in the Brick with a full charge from riding and then its ground cable was detached from the transmission. The Brick started right up in spring year after year so I bought another two years ago when I didn't want to push my luck any longer. Smile
I was fiddling around with my well-used 24V electric mower the other day, the kind you push into the shed in October or November and forget about 'til springtime, charging only throughout summer with use. Well, looking at your 'cheap' battery link I see this old mower has two of this very (Asian) brand inside strapped in parallel with a hand-scribbled install date of May, 2008. Bloody hell! They're only now not holding a charge well.

Sixteen years. 16. Six-teen.

I can get them locally for US$72 the pair plus 9.8% tax.

The last (again, cheap) battery I bought for one of my K1200RS was just under $50 delivered. Fit last October it sat all winter untethered to a charger of any sort. It cranked with gusto and the bike fired first crank the other day.

I've reliably been a BMW (5 - 7 years), old school Odyssey (14 years) or Motobatt (irregular due to storage in OZ) user, with the occasional lithium, for yonks. Now I'm on a pensioner's budget, no longer tempted by the dealership stock I had my hands on, I reckon I might’ve been spending too much.  Surprised


__________________________________________________
Patience is something you admire in the driver behind you and scorn in the one ahead.
~Mac McCleary
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.
    

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