250 twin advice wanted

250 2c- the Wee-WeeVees

250 twin advice wanted

Postby budgie955 » 19 Jul 2016 07:08

Hi All
I have acquired a 250 2c twin and am looking for a wiring diagram for it, specifically how the 3 wire alternator (2 yellow and a red) wires up to the solid state rectfier that came with the bike. Can anyone help?

Thanks
Dave
UK
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Re: 250 twin advice wanted

Postby EVguru » 19 Jul 2016 14:18

Red wire to battery+, either via a terminal in the fuse panel, or direct.

Yellow wires to the terminals on the regulator marked "Giallo". The regulator should also have a brown wire, switched via the ignition.
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Re: 250 twin advice wanted

Postby budgie955 » 19 Jul 2016 15:49

Thanks for the info
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Re: 250 twin advice wanted

Postby budgie955 » 20 Jul 2016 17:18

Anyone got a 250 wiring diagram - ? i might need it!

Thanks
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Re: 250 twin advice wanted

Postby Ming » 22 Jul 2016 07:25

Do you mean the connections to the original Decatielettronica regulator (as described by Paul - I think), or a more modern regulator?
I have a Boyer Bransden 'Power Box', the connections to which are: 2 yellow to the ac input and leave the red isolated and tied back.
I may have a wiring diagram, I'll have a look.
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Re: 250 twin advice wanted

Postby budgie955 » 22 Jul 2016 07:31

I have a solid state rectifier, the original is missing. Is it supposed to run a dual voltage system? The battery is 6v but all the bubs are 12v.. connecting the 2 yellows to the rectifier is putting too much voltage into the battery, risking damage. Any thoughts guys?

Thanks
Dave
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Re: 250 twin advice wanted

Postby budgie955 » 22 Jul 2016 07:33

i am guesing i need a proper regulator rectifier unit, not just a rectifier on its own.
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Re: 250 twin advice wanted

Postby EVguru » 22 Jul 2016 07:35

The alternator for the 6V 250 is the same as that for the 12V 350, the voltage output is set by the regulator. It sound like someone has done a 12V upgrade.
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