77 KZ650 Time for a new Battery - Recommendations

mrmach5
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16 Nov 2025 08:57 #919109 by mrmach5

77 KZ650 Time for a new Battery - Recommendations was created by mrmach5

Another one bites the dust! Bikemaster Platinum MS12-10L-A2 (made in China), almost made it 3 years. Not real Impressed.
Any suggestions for a better option ?
Thanks

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TexasKZ
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16 Nov 2025 19:51 #919116 by TexasKZ

Replied by TexasKZ on topic 77 KZ650 Time for a new Battery - Recommendations

I have had really good luck with Interstate AGM batteries.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/forum/11-projects/620336...amateur-build-thread

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asphalt900
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17 Nov 2025 00:21 #919121 by asphalt900

Replied by asphalt900 on topic 77 KZ650 Time for a new Battery - Recommendations

If you don't mind the funky yellow color, Motobatt batteries. Switched over to this brand a few years ago. Steer clear of any Oreilly product! Every battery over the past 5yrs has failed within a year.

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ThatGPzGuy
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More Sparky than Speed Racer

17 Nov 2025 04:52 #919123 by ThatGPzGuy

Replied by ThatGPzGuy on topic 77 KZ650 Time for a new Battery - Recommendations

+1 on the Motobatt . Mine lasted seven years before I took it off the road for an engine rebuild. It probably would have kept going.

Jim
North GA
2016 Yamaha FJR1300ES
1982 GPz750 R1
1974 Kawasaki H1
1976 Kawasaki KZ400
1979 Yamaha XS650 cafe'
2001 KZ1000P (sold)
2001 Yamaha YZ426
1981 Honda XR200 stroked in an '89 CR125 chassis
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it, it's not really yours"

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mrmach5
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17 Nov 2025 06:45 #919127 by mrmach5

Replied by mrmach5 on topic 77 KZ650 Time for a new Battery - Recommendations

Sorry, I guess I should have been more specific. Although I was looking for positive experiences regarding brands , lots of brands don't offer an AGM that fit a 77 KZ650B . If you know of one, part # please.
Thanks again.

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Wookie58
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17 Nov 2025 07:03 #919128 by Wookie58

Replied by Wookie58 on topic 77 KZ650 Time for a new Battery - Recommendations

mrmach5 wrote:
Sorry, I guess I should have been more specific. Although I was looking for positive experiences regarding brands , lots of brands don't offer an AGM that fit a 77 KZ650B . If you know of one, part # please.
Thanks again.

1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca

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kylemontmont
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17 Nov 2025 07:54 #919129 by kylemontmont

Replied by kylemontmont on topic 77 KZ650 Time for a new Battery - Recommendations

Scorpion is another brand that seems to make the old sizes, I was eyeing up a scorpion for my KZ440 to replace its cheap mighty max that is on its way out prematurely. This thread has me also considering mottobat though.
www.scorpionbattery.com/powersports-batt...kz650-sr-ltd-custom/

1983 KZ440 LTD
Brevard County, FL

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Nessism
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17 Nov 2025 08:26 - 17 Nov 2025 08:28 #919130 by Nessism

Replied by Nessism on topic 77 KZ650 Time for a new Battery - Recommendations

Get one of these chargers/minders. It will keep your battery charged, and reduce degradation.

Most batteries die when allowed to sit for long periods of time discharged. This particular charger keeps the battery charged by sending a pulse, which is better than a "battery tender", or at least, so I'm told, which sends constant current.

https__://www.ebay.com/itm/395623222797 (remove underline)

And BTW, I use Motobatt. They are some of the best batteries going, but don't let them sit discharged, or it will kill them.

Ed
Carb O-ring Kits : www.kzrider.com/forum/14-vendor-forum/62...rburetor-o-ring-kits

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread

Last edit: 17 Nov 2025 08:28 by Nessism.

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gordone
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23 Dec 2025 03:10 #920000 by gordone

Replied by gordone on topic 77 KZ650 Time for a new Battery - Recommendations

Yuasa AGM battery?

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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H1Vindicator
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23 Dec 2025 05:34 #920003 by H1Vindicator

Replied by H1Vindicator on topic 77 KZ650 Time for a new Battery - Recommendations

Yuasa AGM battery?

No, not for vintage motorcycles. not for any KZ that I've checked, anyway.

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Nessism
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23 Dec 2025 05:59 #920004 by Nessism

Replied by Nessism on topic 77 KZ650 Time for a new Battery - Recommendations

H1Vindicator wrote:

Yuasa AGM battery?

No, not for vintage motorcycles. not for any KZ that I've checked, anyway.

They sell one for the KZ1000. The same battery will physically fit in a 650, but the terminals are reversed.

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gordone
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23 Dec 2025 07:21 #920006 by gordone

Replied by gordone on topic 77 KZ650 Time for a new Battery - Recommendations

Ahh, when you not have upgraded to shunt type charger?

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine

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