Modern Vespa

So after writing up an email to a friend with known good stator values, I came up with the idea of starting a thread similar to the metal stainless trim serial numbers that was on here a while back. My idea is for people to add resistance values from various scoots until we have a library to go through. That way we can all look in the library if we're questioning a stator or wiring. Bonus points if you can add a picture of the stator.

So I'll start- Grounding point was a fan cover screw. The bike is not running. Just checking resistance values.

2005 Stella. 5 wire stator
G- 381 ohms
R- 107
W- 0.00
Black- 0.00
Blue- .005

1979 US P200 7 wire stator
G- 495 ohms
Red to CDI-128
W-00.2
Black- 00.5
Yellow - No continuity
Red to harness- No continuity
Purple- 00.5 ohms

1966 Sears Bluebadge

Ignition coil 460
Blue .2
Red .6
Black .1
Green .2

Engine shroud bolt was the grounding spot.

cool idea! We can actually make a formal Wiki Entry that we can link to as well if desired

Just the ignition wires test on my 76 ET3.

Key turned to on, CDI disconnected. Digital multimeter set to resistance. Red probe to the wire, black probe to the ground\CDI mount.

White wire: .000 ohms
Red: 111.9 ohms
Green: 442 ohms
Green: no continuity (because the key is turned on)

Thanks to nightwolf0215 for the values. Stock 2005 PX150.

Key off, stator still in scoot. Stator disconnected from harness. Ground point fan shroud bolt.

white .3
red 112
green 505
green #2 .5
black .3
blue .8

Here's a 1980 US 100 Sport, 8 wire stator, in engine, all wires disconnected, (-) test lead clipped to shroud:

Wires out to CDI:
Green 524 ohms
Red 112 ohms
White -0-

Wires out to terminal:
Black -0-
Purple -0-
Green 524 ohms
Yellow no continuity
Red no continuity
(Y&R -0- to each other)

125 Primavera. US Spec
B 0.00 ohms
Y .69
R 0.00
G 0.00
Y .70

SIP Vape AC, static timing

Blue to black- .002
No continuity black to any other color

Brown to red- 480
Brown to white- 67
Red to white- 560

Quality post.
Had not seen this before.
Nice work MJ

Can anyone offer up some values for a PX non-battery stator? I have a new one on the way but I'd like to diagnose / repair anything on my current one and save it for future use. They're always fixable, right?

Px non battery stator (new)

Red 110 ohm
White 0.7
Green n/a no connect
Black 1
Blue 1.2

Grounded to stator plate

Thanks John!

SIP Stator for: Vespa 50 R/​Special/​SR/​SS/​90/​R/​100/​125/​PV/​ET3
WITH handlebar indicators.

https://www.sip-scootershop.com/en/product/stator-plate-sip_15077460?q=STATOR

This works on my Canadian V100 pre sport with bar end signals. Only difference is this stator requires bar end signal bulbs at 6v-10w instead of the stock bar end bulbs which are 6v-18w.

Red to Black wires (IGNITION/HT COIL): 0.3-0.4 ohms (flickers between the two)
Yellow to Black wires (BAR END SIGNALS): 0.5-0.6 ohms (flickers between the two)
Blue to Black wires (TAIL/BRAKE LIGHTS AND HORN): 1.1 ohms
Green to Black wires (HEADLIGHT AND HORN): 0.3-0.4 ohms (flickers between the two)

What are you using to measure milli ohms? With values that low you really need a good milli ohm meter. I've seen readings that high just touching leads together. A 4 lead system helps cancel out errors when readings are that small. I use a Fluke 289 for a handheld meter and it is OK in the 200 - 300 milli ohm ranges you are in. A dedicated 4 wire setup is best for values that low.

https://www.harborfreight.com/electrical/electrician-s-tools/multimeters-testers/11-function-digital-multimeter-with-audible-continuity-61593.html

Set to the lowest setting 200ohm. I'm not exactly sure if that scale translates to 1:1 exact ohms on the whole number or if a decimal reading like 1.1 is a multiple of ohms or something like that. Might have just been bad notation on my part by just calling it 0.6 ohms.

Vespa V100 (pre sport) Stator with bar end signals (came off a Canadian V100):

Red to Black: 0.5-0.6 (flickers between the two)
Yellow to Black: 1.7-1.8 (flickers between the two)
Blue to Black: 0.9-1.0 (flickers between the two)
Green to Black: 0.3-0.4 (flickers between the two)