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1976 Kawasaki KZ 400 without battery 26 Apr 2023 10:21 #883786

  • kdx200
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Can A 1976 Kawasaki KZ 400 be started(kicked) and RUN without a battery?

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1976 Kawasaki KZ 400 without battery 26 Apr 2023 13:21 #883793

  • Wookie58
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No, the generator won't produce enough power at "kicking" speed to power the ignition

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1976 Kawasaki KZ 400 without battery 04 May 2023 14:24 #884237

  • gordone
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Could installing condensator be a option?
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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1976 Kawasaki KZ 400 without battery 04 May 2023 17:42 #884244

  • TexasKZ
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A large capacitor might work, but a modern regulator and a LiFePo battery might be a better choice.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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1976 Kawasaki KZ 400 without battery 04 May 2023 19:00 #884249

  • Nerdy
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In theory I think that could work, but large capacitors can be dangerous. Back in the days of CRT-based televisions, people would get knocked on their backsides (or worse) by the capacitors inside the TV.

I think an ignition - even for a small bike - would need a noticeably larger capacitor than would be found in a TV, making the idea more risky.

Also I think the bike would basically need to start on the first kick every time for the concept to work. I'm not a double-e and might very well be wrong on the math. TexasKZ's idea is probably the way to go. :)
1979 KZ400 Gifted to a couple of nephews
1967 Yamaha YCS1 Bonanza
1980 KZ440B
1981 Yamaha XT250H
1981 KZ440 LTD project bike
1981 GPz550
2013 Yamaha FZ6R

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1976 Kawasaki KZ 400 without battery 04 May 2023 23:25 #884258

  • Wookie58
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Could installing condensator be a option?
The stock generator is "regulated" by battery voltage (no battery means no regulation) so you would need a totally different generator set up (like a motocross bike or lawnmower) or you will fry the generator. Why do you want to run without a battery ? Also I believe the KZ400 has a "field coil" generator which requires a battery feed to the field coil to generate anything

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Last edit: by Wookie58.
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