Help wanted with regulator wiring

A friend is rebuilding a MK 3 Commando and is unsure how to wire up the regulator/rectifier. It's got 5 wires: 3 yellow, a red and a black. I assumed it was for a 3 phase system but according to the owner it had been on the bike for several years and charged ok. The bike's alternator has 2 wires. An electrician had started fitting a new loom and gave up so don't know how it was originally wired. It looks like a Podtronics but there is no identifying label. Appreciate any ideas and don't have a photo.

Graeme

Yes it will work - just don't connect anything to the third pin.

However, a third of the circuit in the RR unit is redundant (in simple terms a single phase has four diodes, and three phase has six), so you need to spec a higher rated RR to prevent burnout.

komet said:

A friend is rebuilding a MK 3 Commando and is unsure how to wire up the regulator/rectifier. It's got 5 wires: 3 yellow, a red and a black. I assumed it was for a 3 phase system but according to the owner it had been on the bike for several years and charged ok. The bike's alternator has 2 wires.

Click to expand...

Adding a little more detail.

Connect the stator wires to any two yellow Podtronic wires (so green/yellow to any yellow, white/green to a different yellow).

Podtronic red is positive, black is negative so must be connected according the bike's polarity.

Standard polarity is positive earth/ground, so black (negative) would normally connect to brown/blue (NU) and red is 'earth'/'ground'. Reverse if the electrical system has been changed to negative earth/ground.


As it's "been on the bike for several years and charged ok." then it seems capable of handling the output.