6v to 12v conversion GP100

[cb1rocket]

Hello all

Yes another subject on this little GP100, and before you start saying its not worth it and all that - well I want to!

Am I right in saying that with a 6v grenny, and direct lighting, then the genny is just 6v AC and up to 2.8 amps. According to the book. So am I right in thinking its not the usual high voltage (30ish volts) AC genny? Seeing as that is only found on bikes where all power is from the battery. If that was direct lighting then the bulbs would obviously blow i imagine?

So my idea was for 12v on all lights but keeping the 6v ignition setup and 6 volt poxy horn from using a dual battery setup?
ie two 6v batteries together while connected to the genny in parallel and the lighting circuit and such connected in series to the battery. The ignition is self excited and is seperate to the charging system.

Any thoughts, good or bad welcome.

Afterall i could run for a HID system if possible, but really a better 35 watt bulb or depending on what the system can cope with

[trisers]

If you connect two 6v batteries in parallel you just end up with a much bigger 6v battery...and having them already connected like that you can't run anything through them as though they were connected in series.
The only practical way to get 12v from a 6v supply is to use a dc inverter circuit but these may only be about 75% efficient. The result is a 6v 2A supply for example will only give about 800mA at 12v...hardly enough to light a torch let alone a headlight!

[N cee thirty]

you might aswell get a extra 12v battery seperate and run the HID system off that and then recharge the battery after you've finished riding
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[cb1rocket]

[trisers]

[cb1rocket]

Good point, I just sat down with some scrap paper and drew out a circuit diagram and was like 'oh bollocks"!

So my other option would be to rewind the stator for 12v somehow.......... alot of classic bikes are done this way. I know a website that says about the BSA with Lucas genny that as it has 3 coils you can connect two of them together to give 12v.

Mine only has two, sodding hell........rewind then, I need some electrical boffins here.........

[trisers]

I suppose in theory you could with some fancy electronics connect two batteries in series and have the genny charge one at a time but i very much doubt it could keep up with the power drain flowing from both batteries together...either your lights go out or you burn out the genny...

[Blau Zedong]

I'd say the best starting point would be the 12V stator from another small Suzi, however i can't think of any with points ignition like the GP. Even if you couldn't use the backplate it may be possible to rob the lighting / charging coils. Look around for RG / TS125 bits on egay, see if there is any potential there. Then you'll need the rectifier and most of the wiring loom, plus the hassle of mounting the 12V battery.

https://www.powerdynamo.biz/deu/systems/lists/suzuki.php

One of these might fit though - they are shit hot (I had one on my RD350B), maybe the TS125 one?
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18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[cb1rocket]

thanks blue, just have to look on egay for some. Already watching 2 GP100 gennies to muck around with.

That site looks impressive I must say