Author Topic: What battery does the K100 take?  (Read 1139 times)

Offline IroncladK75

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  • From the grave
What battery does the K100 take?
« on: January 10, 2023, 07:48:07 PM »
I need a replacement for my 1985 K100, any recommendations are appreciated. I would prefer one I could buy at batteries plus or somewhere in person.


* 4fabccc221e6468588832b9bc001975c.jpeg (94.55 kB . 768x432 - viewed 245 times)
  • Driveway
  • 1985 K100

Offline sebas2357

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  • Posts: 96
Re: What battery does the K100 take?
« Reply #1 on: January 10, 2023, 10:11:32 PM »
FWIW, I've had a 2 poor experiences with batteries plus with odyssey pc680s. I know it's the holy grail of K bike batteries, but I had mine go bad twice and BP refused to replace it as they deemed it user error both times.

As they say: Fool me once, shame on you. Fool me twice, shame on me.

Right now, I'm using the Duralast ETX16L. They sell them at autozone. So far so good, I recommend them.

https://www.autozone.com/miscellaneous-non-automotive/power-sport-battery/p/duralast-agm-ready-to-ride-power-sport-battery-etx16l-325-cca/350081_0_0
  • Low-Country, South Carolina
  • 1985 BMW K100, 2013 Honda Shadow Phantom (Sadly Sold)

Offline IroncladK75

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Re: What battery does the K100 take?
« Reply #2 on: January 10, 2023, 11:22:32 PM »
I will give it a shot, thank you
  • Driveway
  • 1985 K100

Offline rbm

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  • Posts: 2295
Re: What battery does the K100 take?
« Reply #3 on: January 11, 2023, 08:21:10 AM »
Here are a list of batteries that should work:

 OEM Battery (Yuasa 53030)
* Cold Cranking Amps (CCA): 325
* 20Hr Nominal Capacity (Ah): 20
* Reserve Capacity Minutes: N/A
* Metric Dimensions L x W x H (mm): 186 x 130 x 171
* Weight (kg): 7.7

Aftermarket Replacements
Deka ETX16L ($119)
* Cold Cranking Amps (CCA): 325
* 20Hr Nominal Capacity (Ah): 19
* Reserve Capacity Minutes: N/A
* Metric Dimensions L x W x H (mm): 175 x 100 x 155
* Weight (kg): 7.7

Yuasa GYZ20HL ($149)
* Cold Cranking Amps (CCA): 320
* 20Hr Nominal Capacity (Ah): 20
* Reserve Capacity Minutes: N/A
* Metric Dimensions L x W x H (mm): 175 x 87 x 155
* Weight (kg): 7

Odyssey PC680-P ($169)
* Cold Cranking Amps (CCA): 170
* 20Hr Nominal Capacity (Ah): 16
* Reserve Capacity Minutes: 24
* Metric Dimensions L x W x H (mm): 181.5 x 76.3 x 167.8
* Weight (kg): 7

Odyssey PC925-L ($230) <== Odyssey recommendation
* Cold Cranking Amps (CCA): 380
* 20Hr Nominal Capacity (Ah): 28
* Reserve Capacity Minutes: 52
* Metric Dimensions L x W x H (mm): 168.6 x 179 x 128
* Weight (kg): 11.8
* Installation requires battery to be placed on its back side to dimensionally fit

Yuasa YTX20HL-BS ($119)
* Cold Cranking Amps (CCA): 310
* 20Hr Nominal Capacity (Ah): 18
* Reserve Capacity Minutes: ??
* Metric Dimensions L x W x H (mm): 175 x 87 x 155
* Weight (kg): 7

Kirkland  207270
Lawn and Garden battery, Fitment code 20, group size U1
* Cold Cranking Amps (CCA): 200
* 20Hr Nominal Capacity (Ah): ??
* Reserve Capacity Minutes: ??
* Metric Dimensions L x W x H (mm): 197 x 130 x 184
* Weight (kg): 8.6
  • Regards, Robert
Toronto, Ontario

1987 K75 - Build Blog @http://k75retro.blogspot.ca/

Offline Chaos

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Re: What battery does the K100 take?
« Reply #4 on: January 11, 2023, 08:56:15 AM »
Yikes, PC680's have gotten pricey since I bought one!  FWIW, they fit my K and Ural and I've had great luck with them, 7-8 years easily.
  • sw ohio
1987 K75S    VIN 0231
Original owner, Original litter
200,000 miles (plus or minus) and 5 paint jobs
sold 6/23
2023 Ural 2WD sidecar (BMW's bastard step child)

Offline Laitch

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Re: What battery does the K100 take?
« Reply #5 on: January 11, 2023, 05:35:38 PM »
I need a replacement for my 1985 K100 . . .
What's happening with that Brick's airbox, ironclad? It's a half-shell!  :laughing4-giggles:
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline IroncladK75

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Re: What battery does the K100 take?
« Reply #6 on: January 16, 2023, 08:32:50 PM »
It was..... A little disassembled...

Here it is now
  • Driveway
  • 1985 K100

Offline frankenduck

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Re: What battery does the K100 take?
« Reply #7 on: January 16, 2023, 10:29:36 PM »
What I use in my Ks (and my boat)
https://www.amazon.com/gp/product/B074VFKRKL
Once I had a Collie pup. Dug a hole and covered him up. Now I sit there by the hour. Waiting for a Collie-flower.
New to K bikes? Click here.
K Bike Maintenance & Mods: Click here.
Buy parts here.

Offline Chaos

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Re: What battery does the K100 take?
« Reply #8 on: January 17, 2023, 01:46:11 AM »
+1 on Westco, excellent battery and looks like price hasn't shot up like the Odyssey  https://www.beemerboneyard.com/westco12v20p.html
  • sw ohio
1987 K75S    VIN 0231
Original owner, Original litter
200,000 miles (plus or minus) and 5 paint jobs
sold 6/23
2023 Ural 2WD sidecar (BMW's bastard step child)