Testing the stator and charging system in a 150cc GY6 Chinese scooter

In this video, I bought a 2014 Tao Tao BWS 150 scooter with 13,215 Km (8211 miles) and had to fix everything.

Torque specifications:
Stator M6 bolts: 7.3 ft-lb or 10 Nm
Pickup coil M5 bolts: 4.4 ft-lb or 6 Nm
Fan cover M6 bolts: 7.3 ft-lb or 10 Nm

Parts:
Spark plug NGK CR7HSA
Ignition coil (standard)
Ignition coil (performance)
CDI (standard A/C powered)
Stator (standard 8 pole)
Performance stator and voltage regulator 11-pole upgrade kit
W5W - 194 - 168 LED bulbs
BA20D LED headlight bulbs

Tools:
Rolling wrench CVT holder
Flywheel puller tool

0:00 intro
0:36 diagnosing no spark
1:03 remove the old stator
1:29 tools
1:54 8-pole stator
2:20 charging system wiring diagram
3:47 testing the stator
6:49 install the stator
7:25 test charging system voltage (fail)
7:50 Amazon stator
8:02 voltage test (pass without lights)
8:28 LED headlight upgrade
9:08 re-wire headlights for DC
10:23 voltage test (fail again)
10:51 saving electricity
11:11 test charging system voltage (pass)
11:37 conclusion

[robertmotion]

ebike mechanic here.
learning to repair Chinese scooters

u are one of my goto channels to troubleshoot and learn.
simple and easy to follow. informative.

new subscriber.

/Bklyn👑

[UrbanMenace]

Brilliant video, explains everything you need to know very clearly. I used to have a PGO GY6 150 with all of those problems that i fixed identical in this video, loved tinkering on it and it went extremely well. i have now purchased a PGO roughhouse 2T 50 to tinker with which the stator upgrade and the DC headlight mod you showed will be my first point of call. Thank you for the video.

[GoldenCroc]

Just wanted to say your videos are always great, and this one is no exception. Kudos.

[mikedowns]

Thank you for your, found my scooter issue , your explanation on the stator having a coil going to cdi was something no one else mentioned from videos I had seen. Your a legend 😇

[williamhaskellhaskell]

You can check voltage inputs and out put to the ignition coil at the c.d.I.! Not too difficult

[jamesivy]

you are the man i have a znen 150-t e motor in a 50cc taotao frame ad wiring was getting nuts, thanks to you son has a ride woohoo

[twatson]

I never ever would have thought that 12v ac would be running to the head light thats insane,

[miguelr]

All my bulbs were blown when I bought a used moped. The voltage regulator was producing 17-19 volts. Check the voltage at the bulb connector. Moped will still run, but without lights or turn signals . . .

[juliopena]

Can a flywheel be bad also? Cause I'm having voltaged jumping up and down super fast . Can't even read the numbers .. what can it be .? I changed stator, regulator/rectifier. And spark plug .. scooter starts but voltage is jumping all over the place

[brandonbennett-kh]

I just bought a vitacci spark 2021 150 for cheap that didn't run I noticed the wire coming off the stator doesn't have the red and black wire to power cdi box this bike is suppose to work with a ac cdi box now this is the issue bike has no spark at spark plug I can't find the 2pin connector that goes to cdi box to power on cdi I have the 4 pin but the other 2 pin wire is no where to be found also I mention there is no black and red wire coming out of stator for cdi am I missing something here the wire colors that's come from stator are 2 yellow wires that plug into a white harness and there's a solid green wire and and a blue wire with white stripe where is the black and red wire for cdi power or did someone put wrong stator in scooter

[muttalippnarbas]

50cc scooter headlight high and shorts exploded.
In the check I made, there is a short circuit in the blue wire going to the headlight socket. The connector is charging. I am getting AC current. Where is the fault? On the alternator?

[Sloby-iezr]

Hello, when I connect my multimeter to the scooter wires that go to the rectifier if only gets to 2 volts at idle, does that mean that the stator is bad?

[troyspartan]

Hello I have a question I recently had a cooling fan to break into pieces on my moped and I purchased a new fan and I put the fan on but after I raod the moped I could hear something rattling around and it sounded like it was coming from inside the stator housing and I'm thinking that pieces of that fan may have gotten into that stater housing and yesterday I tried to start my moped and it will not start now it will crank over but it's like it's not firing and I checked the spark plug to see if I was getting a spark and is not getting a spark now and I'm thinking that the pieces of the fan messed up the stator coil have you ever heard of this happening?

[Eoss]

Hey paul, i am really stuck right now with a no spark issue. First let me just say, wether i use the old stator or the new stator i dont get a reading out of my multi meter for anything i do in this video unless the stator is hooked up to my scooter, secondly on both stators im not getting any reading when I test the green wire with the red/black i get nothing, just the OL. But when i test the blue wire with the green, i get roughly the same numbers on both stators which seem to be the normal numbers based on this video. Do you know what this could be? Do i just need to try another (3rd) stator? And my stator is 8 pole 4 wires. With 1 black/red 1 blue and 1 green and 1 white wire. And my multimeter was cheap only 16$. And i bought a new spark plug wire coil and that also gives me a reading of 0. Sometimes it’ll start at like 6 or 7 and then jump all the way down to 0 in a matter of seconds one number at a time. Weirldy enough that happens on both the old coil and the new one.But it seems as though the old one works even better because the new coil tends to be at 0 much more frequently. Any help would be greatly appreciated.

[eskip]

Hi, first of all, thank you very much for the very clear video. Unfortunately I have a different type of stator so my value will differ. How do I find out the spec (value) of a 31120-LEJ2-E10 stator so that I can measure it?

[DankLordvsGames]

Would it be better to add a rectifier to convert AC to DC with something that can better handle the load? I'm in a similar situation and I'm looking at the best available option to me. This method seems fine, but also too good to be true?

[PedroRodriguez-hyty]

How about honda click from the Philippines

[Great_XicoZe]

Great video. I'm having a problem on my sym vs 125 2010. The stator outputs 100v @4000 rpm and the engine start to misfire at this rotation.
It's a problem with this stator or this is normal?
If I disconnect the three yellow wires from stator to rectifier, the engine works fine on all rpm.

[DivergentDroid]

You have done Great work! But.. where are you going to find a Chinaman in the USA willing to test it! LOL Kidding. I LOVE My DF Moto brand Chinese 150 cc scooter! Not one serious problem in the two years I've had it. Lab Coat Paul's videos help make sure of that! Thank you Lab Coat Paul!

[ashervoorhees]

Are you going to try the rav4 out in the snow?