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Can a battery eliminator be use on 77' kz650?
- exc3456
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- TeK9iNe
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Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
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- loudhvx
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I want to get rid of the battery. Can i use a battery eliminator on this model?
No, that's the one KZ650 that cannot use a battery eliminator as it came from the factory. It uses an excited-field alternator. You need a permanent-magnet alternator to use a battery eliminator.
In order to do it, you have to convert to a 78 or later charging sytem. Everything must be swapped: Stator, rotor, alternator cover, regulator, rectifier, and some harness wiring.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
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- TeK9iNe
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exc3456 wrote:
I want to get rid of the battery. Can i use a battery eliminator on this model?
No, that's the one KZ650 that cannot use a battery eliminator as it came from the factory. It uses an excited-field alternator. You need a permanent-magnet alternator to use a battery eliminator.
In order to do it, you have to convert to a 78 or later charging sytem. Everything must be swapped: Stator, rotor, alternator cover, regulator, rectifier, and some harness wiring.
Bwah! :silly: Do what this man says... he know da #$%&! :laugh:
Lou... can a custom voltage regulator setup be used prior to a bettery-less system instead? Or is this the only alternative?
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
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- loudhvx
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Lou... can a custom voltage regulator setup be used prior to a bettery-less system instead? Or is this the only alternative?
ahh, very very good question. I've been waiting for some one to ask this for years. Yes. You can make a different style regulator to eliminate a battery and not use a capacitor. It is called a clipper, because it doesn't shunt the excess power to ground like our shunt regulators do on most KZ's (not on 77 650). It clips the voltage at a pre-set level. Unfortunately, it is a bad idea for our KZ's.
Here is the one I made for a Honda dirtbike:
home.comcast.net/~loudgpz/GPZweb/RegRec/GPZacRegulator.html
It's for a 6v system, but would be easy to convert to 12v.
This, however is very inefficient and will waste a lot of crankshaft horsepower unnecessarily on a KZ. It would only even be viable on 3-phase systems. Single-phase systems drop down near zero v, so a cap would be a must on those.
There is only one place you would want it... in a totally AC system. The clipper can work on AC or DC systems, but you would not want to actually use it on a KZ, or most DC systems. Some scooters and dirt bikes run everything on AC. They usually don't have a regulator (or rectifier), so when going fast on a road, they can start blowing bulbs with too much voltage. For these bikes a clipper is necessary because you can't use a normal shunt regulator with a capacitor. These systems have to change polarity every cycle, so a cap is useless (as a battery would also be un-useable). There are other ways to do it, but the clipper is simplest.
While it is clipping, it burns away a lot of power so it would be a bad idea on most street bikes. It's only a good idea on a bike that was designed to have a weak alternator...one which did not have a lot of excess power (that's why scooters and dirtbikes have dim headlights at idle). That way the clipper is only used during the brief times that the bike is at high RPMs and putting out max power.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- exc3456
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- loudhvx
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1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.
- TeK9iNe
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- Posts: 2440
- Thank you received: 28
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
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