Page 1 of 1

250 twin advice wanted

PostPosted: 19 Jul 2016 07:08
by budgie955
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

Re: 250 twin advice wanted

PostPosted: 19 Jul 2016 14:18
by EVguru
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.

Re: 250 twin advice wanted

PostPosted: 19 Jul 2016 15:49
by budgie955
Thanks for the info

Re: 250 twin advice wanted

PostPosted: 20 Jul 2016 17:18
by budgie955
Anyone got a 250 wiring diagram - ? i might need it!

Thanks

Re: 250 twin advice wanted

PostPosted: 22 Jul 2016 07:25
by Ming
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.

Re: 250 twin advice wanted

PostPosted: 22 Jul 2016 07:31
by budgie955
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

Re: 250 twin advice wanted

PostPosted: 22 Jul 2016 07:33
by budgie955
i am guesing i need a proper regulator rectifier unit, not just a rectifier on its own.

Re: 250 twin advice wanted

PostPosted: 22 Jul 2016 07:35
by EVguru
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.