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PAMCO Wiring
- Thread starter rickrman
- Start date
Assuming an early (points bike) stator with 3 Nylon screws on the brushes and a late model, 8-pin (7-wire) regulator/rectifier, the following would work:
Changed: Black brush wire to brown switched power and removed direct connection from brush to ground
Changed: Black brush wire to brown switched power and removed direct connection from brush to ground
You don't seem to understand - the ignition system, in your case a Pamco, has nothing to do with the charging system, they're two separate circuits. You needn't be concerned with the ignition (the Pamco). It will work with pretty much any charging system, even a PMA.
Your issue is the charging system and getting it to work right with that cheapo Chinese combined reg/rec. From what we can see, that cheapo unit contains a ground regulating type 'A' regulator. That means it won't work with the inner brush grounded. The outer brush gets fed the ground from the type 'A' regulator. That would give you two grounded brushes but a circuit needs power and ground to operate. That's why the inner brush will need switched power fed to it. But, since the inner brush grounds out to the stator housing through it's 3 mounting screws, you can't just feed power to it, it will just short out. That's why you need to do the nylon screw mod if you want to use that type 'A' regulator. Here's a thread explaining the two types of charging systems used on the 650, and the two types of regulators used (ground regulating type 'A' or power regulating type 'B'). It doesn't get into the nylon screw mod but once you understand how the system operates, you should realize why the nylon screws are needed in some cases (when trying to use a later ground regulating type 'A' regulator on an early system).....
https://www.xs650.com/threads/diy-reg-rec-5twins-and-jim.55842/
Your issue is the charging system and getting it to work right with that cheapo Chinese combined reg/rec. From what we can see, that cheapo unit contains a ground regulating type 'A' regulator. That means it won't work with the inner brush grounded. The outer brush gets fed the ground from the type 'A' regulator. That would give you two grounded brushes but a circuit needs power and ground to operate. That's why the inner brush will need switched power fed to it. But, since the inner brush grounds out to the stator housing through it's 3 mounting screws, you can't just feed power to it, it will just short out. That's why you need to do the nylon screw mod if you want to use that type 'A' regulator. Here's a thread explaining the two types of charging systems used on the 650, and the two types of regulators used (ground regulating type 'A' or power regulating type 'B'). It doesn't get into the nylon screw mod but once you understand how the system operates, you should realize why the nylon screws are needed in some cases (when trying to use a later ground regulating type 'A' regulator on an early system).....
https://www.xs650.com/threads/diy-reg-rec-5twins-and-jim.55842/
rickrman
XS650 Enthusiast
This appears to be the correct cheapo reg/rec design with the nylon screw trick applied. I'm going to try it. You guys are invaluable to my effort and I still have the carcass of "Burnie" if you want any parts. Advance weights, drive gear and left side cover are gone. The major guts are still turning. Just LMK. THANK YOU EVERYONE!
Attachments
rickrman
XS650 Enthusiast
Thank You. Should I fuse the green wire between the brush and the cheapo or is that overkill? I have the cheapo red wire fused at 10A.
rickrman
XS650 Enthusiast
If I were to just change the cheapo for a compatible that would work without the nylon screw trick, what would you suggest? Anybody? Thank You.
No, don't fuse the green wire, and there's no need to add a 10A fuse to the red wire either. It is already fused by the main 20A fuse.
This bike uses an automotive type 3 phase alternator. For that reason, we're able to use low cost (and very well made) automotive regulators. Details are here .....
https://www.xs650.com/threads/diy-reg-rec-5twins-and-jim.55842/
I think this is the best set-up for these bikes. I don't know why guys pay up near $100 for a motorcycle specific reg/rec. Probably because they don't know any better, lol. You can usually put one of these reg/recs together for $20 to $30.
This bike uses an automotive type 3 phase alternator. For that reason, we're able to use low cost (and very well made) automotive regulators. Details are here .....
https://www.xs650.com/threads/diy-reg-rec-5twins-and-jim.55842/
I think this is the best set-up for these bikes. I don't know why guys pay up near $100 for a motorcycle specific reg/rec. Probably because they don't know any better, lol. You can usually put one of these reg/recs together for $20 to $30.
rickrman
XS650 Enthusiast
THANK YOU! This post should be at the top of all related search topics. The guys that wrote it are way cool.
rickrman
XS650 Enthusiast
Found this regulator on Rockauto. The VR794 that was on ebay is gone. I'm going to try it with the groovy rectifier. https://www.rockauto.com/?carcode=1104949&parttype=4884
should have a 7.5amp fuse after the kill switch and before the coils to isolate and protect the pamco
rickrman
XS650 Enthusiast
Thank you. I'm going with the VR794 Fiat type regulator from rockauto and this rectifier. https://www.ebay.com/itm/2646247826...HBx/zZL7CDTS5WvajossLlSyxi|tkp:Bk9SR7TxkdXQYQ
That rectifier appears to have a 1200 V rating ..which seems to be to much ( not seen the Specs )
It probably will work ..but there can be cheaper alternatives
That Fiat regulator is an 'A' type so will require you to use the nylon screw mod. If you want to mount and wire the brushes like stock (steel mounting screws, full time grounded inner brush), you need a 'B' type power regulating regulator like the VR115.
rickrman
XS650 Enthusiast
Oh no! Thank You! VR115 it shall be. found it on Amazon. Flushing $$$ is what we do.
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rickrman
XS650 Enthusiast
Oh no! Which rectifier would best match my VR115 regulator? Thank You.
rickrman
XS650 Enthusiast
Found this: https://www.windynation.com/Rectifier/35-Amp-3-Phase-Bridge-Rectifier/-/218?p=YzE9MjA=
Says 0-1000 volts so I presume 1200 is OK. Thank You.
Says 0-1000 volts so I presume 1200 is OK. Thank You.
