I did see that. How are the 2 wires connected to this? ie which is which?
-
Enjoy XS650.com? Consider making a donation to help support the site.
XS650.com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going.
Another charging question (sorry) :)
- Thread starter Tony g
- Start date
A PMA regulator definitely will not work on a stock XS650 charging system.
XS650 has a field excited rotor charging system similar to older BMW and Guzzi (they used Bosch field excited alternators). It's a reliable system and has a big advantage of being able to use cheap and reliable standard industry rectifier and regulator.
Last edited:
Refer the link in post 7 in this thread to a previous post of mine. You need to wire into the stock wiring harness at a 3 way and a 6 way plug as I have shown.
The rectifier has three white wire inputs, a black and red output. Wire the rectifier pig tail to match that on the bike harness. Five terminals are used in the six way plug. The rectifier I showed will need 8mm flag crimp terminals as shown in post 7.
The regulator has a 3 pin plug. Brown, Green and Black. +ve goes to brown, F goes to green and black goes to -ve. Again wire the three pin plug to match that on the harness.
If your harness has been butchered to the state where the 6 and 3 way plugs have been removed, then it might be time for a new harness. If that is the case you don't know what else has been hacked at. Hope that helps.
Last edited:
Cheers, the RE 55 on the bay looks like 2 teminals from here, is one below the other?
I suspected my unit to be faulty on my '80 model unit so I made my own following the DIY reg/rec post by Jim and alls well.
Is that regulator from a car or a generic copy?
I forget, I want to say it's for an old Fiat? I bought it off ebay.
I can't really see the detail, the picture eBay isn't good enough. I'm going to guess that one terminal will be marked +ve which would be reference voltage, brown wire. And the other terminal will be marked F, which is field excitation voltage, green wire. That would mean the third wire in the three way harness plug (black) grounds to the metal body of the regulator. If you rubber mount the RE55 the way I did the Lucas unit, following the stock regulator mounting, it's essential you have good ground. That's the black wire in the three way connector.
I must stress that you have to do your own due diligence but the resulting reliable charging system and the learning you gain is ample reward. I did the conversion with zero prior experience, just following the information here.
Note that excellent set up is for a 1980, yours is different it uses two plugs not one plug as shown there.
You can make that if you like, but you'll have to use a three way plug and a six way plug as I previously described. It's nice and neat for sure.
Yes I've been reading through some posts of yours etc so Im wary of the 2 pin and it did confuse me a bit. Basically then whatever is the field connector on the reg will go to the brush and the other 2 live and earth. ?
Yes. Green wire sends voltage from the regulator to regulate the rotor field (magnetic field) and control alternator output. Hence regulator pin is marked F.
Reference voltage is switched live on the brown wire.
And the ground pin can be found with a resistance meter between the pin and the Housing
Be careful before connecting the other 2 pins not getting it reversed
AS mentioned there is markings and paperwork .They are standardized names on the pins can google it. which pin is which
take your time and ask here
It can be over without smoke or poff sound.
Absolutely, good advice.
You're right, that's from a PMA-equipped bike. There's no way to regulate field coils with that.
Yes Ive already given it away today to a GSXR owner
So some progress this morning. I have a rectifier from RD 400 in my spares box. I made a jumper harness and connected it to my bike loom. Kept my feed to the brushes, fired her up and hey presto 16v DC! (I switched off quickly at that point) No fires or shorting sounds. So this proves out my alternator and wiring at that end which has eased my concerns.
If I get chance tomorrow I may add the 3 wire RD regulator and correct the loom wiring to see if regulates too, if it does I'll go the route youve suggested with new Bridge rectifier and car type regulator.
Feeling happy
Thanks guys for the advice
Tony
If I get chance tomorrow I may add the 3 wire RD regulator and correct the loom wiring to see if regulates too, if it does I'll go the route youve suggested with new Bridge rectifier and car type regulator.
Feeling happy
Thanks guys for the advice
Tony
Not that Im aware of, it could be 250 stuff I got too. Has a regulator with 3 wires black green brown so Im assuming its field triggered on the green like ours. I'll find out tomorrow when I wire it in loosely.
We speak English but I do love and really smile when I see how different our phrases can be... Cheers
