SOHC.co.uk Forums > CB500/550

Reg/rec wiring

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ka-ja:
From a large scale 400f drawing, red to positive terminal, green is earthing to frame, yellows to rectifier to alternator, original regulator wiring is black (switched positive) to regulator, white ex regulator to exciter coil, green to earth.

Lkp:
This is what I'm trying to figure out

Bryanj:
The standard Honda reg controle the voltage to the white wire of the field coil, that combined unit does not appear to bo that if the black connects to a switched power AND the white field as the field willbe full powered permanently.

This means unless that unit has a "shunt" style regulator dumping excess power to earth it aint gonna work and to my eye it simply isnt big enough to dissipate the heat involved in that

Lkp:
Thanks for the message mate.. This is the one dss sell for this bike.
Not one I've used myself in the past

Bryanj:
Just because they sell it, and import it from China probably, don't mean its gonna last long! if you can remember the size of the Zenner diode on the 70's Triumphs and the heat sink that was doing the job of "shunting" extra charge to ground.

I have seen combined units that alter the power to the field to alter output and personally I think that is a far better system, if you are into electronics I have, somewhere, a circuit diagram for such a unit, Steve had a 500 with Yamaha cast wheels that the builder designed the circuit for

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