The "Red" wire from the stator goes to the HT Coil, but that's the end of the red wires there. Christopher Markley wired my stator and PX HT Coil, when he rebuilt/restored the engine. I will contact him to find out what is what as I am near ready to wire the junction box.
I called Christopher last night and he told me each manufacturer wires these differently so I emailed Scomo (Scoot Richmond), because they were closed and posted this question on BBS.
Here's my problem:
My SS180 is a 1967 USA released model and the wiring does NOT match the GS/SS diagrams I have found.
My model is:
I am using a PX125 HT Coil.
Christopher M. rewired the stator and copied exactly what was in the bike. Same color wires and gauge, etc.
Note that I only have FOUR wires coming from the stator:
- Red (hooked into the HT Coil and NOT available for the junction box)
- Blue (thicker than all the wires)
The wire harness I bought has FIVE wires:
I have heard that some production runs will differ from the standard electrical schematics and that will NOT be noted in any electrical diagram I find. I know that Christopher M. copied exactly what wires came from my stator when he rewired it -- using the same colors. There were no signs that farmer John rewired the stator before the bike had its stroke and was put in the barn.
our stator has the one doubled current power source for lighting generated by two lighting coils. I guess it would improve the load balance for the lighting (+ horn) circuit.
Or, Piaggio just want to cut the cost by eliminating the (Sky) Blue wire from the stator!? ;-)
Connections would be as following.
From the stator:
Red -> HT coil terminal 2 -> Red(add new wire) -> Junction box terminal #1
Blue -> Junction box terminal #2
Green -> Junction box terminal #3
Black -> HT coil terminal 1 (or motor case) -> Black(add new wire) -> Junction box terminal #4
At the junction box:
Red(from HT coil) -> Terminal #1 -> Red(from wiring harness)
Blue(from Stator) -> Terminal #2 -> Bule and Yellow(both from wiring harness)
Green(from Stator) -> Terminal #3 -> Green(from wiring harness)
Black(from Stator) -> Terminal #4 ->Black(from wiring harness)
At the switch box on the handle bar:
Terminal 1: Black (from wiring harness via Head light socket)
Terminal 2: N/A
Terminal 3: 2 Yellows (from wiring harness and Head light socket)
Terminal 4: White (from horn)
Terminal 5: N/A
Terminal 6: Brown (from Head light socket)
Terminal 7: Violet (from Head light socket)
Terminal 8: 2 Greens (from Horn and wiring harness)
At the Brake switch:
(Sky) Blue and Black (both from wiring harness)
At the Head light socket(terminal number unknown):
#1: (Sky) Blue(from Speedo) and Yellow(switch box)
#2: 2 Blacks(from wiring harness and switch box)
#3: Violet(from switch box)
#4: Brown(from switch box)
Red(stator): Ignition power source
(Sky) Blue(stator): lighting power source
Green: lighting power source
Yello(inside the stator): connection doubling the current from lighting coils
Black: ground line
Red: Ignition kill circuit
(Sky) Blue(wiring harness): Stop light circuit
Yello(wiring harness): Speedo, Pilot and Tail light circuit
Green: Horn and Head light circuits
Black: ground line