HOW TO TEST A STATOR / WHAT IS A STATOR [step by step] GY6

[@arthurtrahan2696]

As a mechanic by trade who has never worked on a scooter or moped, I must say that I found this video very informative. I never knew what a stator did or how it worked. Thank you very much for all the work you are doing to educate those of us that don't have all the knowledge that you do

[@nickr1184]

Just a very old permanent magnet alternator haha. Only its built behind the flywheel.

[@kristinagaddy8504]

What he doesn’t know is the red and black plastic tips come off and he’d have a long prob to use and wouldn’t have to place metal pieces to get connection while testing. 🤣🤣. I’ll be sexist…I’m female and know this & I don’t know a ton about engines but knew this much 😂 Lord. 🤦🏻‍♀️

[@davidpaulsen449]

THANK YOU! I've been rebuilding 70's and 80's bikes for 15 years and someone brought me this GY6 and I've been mind-boggled trying to figure out the no-spark. I've never seen a DC Stator. I've always seen the rotor/stator into the Regulator/Rectifier (and onto the CDI box after '79/'80). All the manuals and test procedures I've found are for testing AC stators and I was starting to think someone hacked into the wiring. Seeing the DC stator on your table and the ground wire and pickup wire with no exciter made me so joyful. I totally get it now. Thanks for making this thorough and thoroughly enjoyable video. Many thanks.

[@M-kill9000]

The gy6 is just a copy of the honda cg125. The rotor/stator and AC/DC cdi-boxes are more or less the same on all the 50cc scooters.

[@karlphilipp9273]

Thank you sir. I worked on many types of vehicles and equipment over the course of my life. But electrical is one area I have always struggled with. You gave a very detailed thorough explanation of a problem I've been dealing with. As you said, there's no manuals or data out there. This is help me resolve a problem I have been dealing with for a while. I am now a subscriber. Again thank you!

[@eyeperture]

Thank you for the valuable lesson, YT should be grateful for all contributors like you. I think there should be a vote for such incentives from YT.

[@RollingWrench]

I really appreciate the kind words 🙏🏻💯

[@simonaustin8332]

Thank you for taking the time to explain and produce these lessons. People like myself need to watch it over and over to get it to sink in , so I really appreciate it.

[@bjk1234xoxo]

Same

[@josephferris6936]

Me too ive rewound the video like 20 times lol bjt everytime i watch again im a bit wiser

[@stevemoore4195]

Thank you sooooo much. I checked everything. All the resistance values, swapped CDI’s, swapped Coils, then finally checked the ‘reluctor to pickup coil’ gap. It was huge. Over 100”. I bent it closer and the bike finally started. 2001 KTM 300 EXC.

[@RollingWrench]

Heck ya!!! Great to know my video helped :-)

[@lenBrill1971]

God dam. This is hands down the best video on youtube explaining the ignition and charging system on most bikes. I'm an idiot and I understood it. Good job ! Subscribed

[@RollingWrench]

Thank you so much for the the kind words :-) I’m happy I helped you out :-) 🙏🏻💯

[@SleepdaBanga]

​@RollingWrench Bro I have a question if the plate that covers the magnetics is missing would that a give you a no SPARK??

[@SleepdaBanga]

Cause me & my buddy brought a 2022 Piranha 125cc electric start & it seems to have no SPARK

[@ZCRAIZED1]

​@@SleepdaBanga You brought it? Where did you bring it? Or bid you buy it meaning you bought it. Or did you brought it?

[@wandajames6234]

Now THIS is an instructional video. I was beginning to give up with all these guys fast forwarding through important procedures, partially explaining things, not showing the parts they were talking about... this was awesome, thank you!!

[@RollingWrench]

I appreciate the kind words and support 🙏🏻💯

[@jerrymccurry9372]

@@RollingWrench Is there a way to test the coil on a 50cc motor without an ohm meter?

[@patrickkillilea5225]

Sir, this is an excellent video. I went to tech school. years ago, and this video would have made the learning so much easier. Just great!

[@rustyshackleford6259]

Explained very clearly and not too fast or too slowly. Easy to follow along and understand, much appreciated.

[@bomiller6727]

I have to say i learned a hollere lot from this video. my pops died before he was able to show me how to "really" use a multi meter, so sometimes it feels like iam speaking greek. Then the stators themselves. I didn't know there were a/c and d/c stators. I work on these things quite a bit. So i do understand what you are saying and will be able to apply it to my endeavors. Thank you

[@scottcates]

This video is superbly helpful. I have worked on carbs for years and have been intimidated by spark and charging systems. The instruction and demo in this video are exactly what I needed to take my motorcycle troubleshooting ability to the next level. I will buy the exact same Craftsman meter so I can exactly replicate this troubleshooting sequence. Thank you.

[@williamleonardo8478]

You did a good job very informative I've been a motorcycle mechanic for 45 years and I still learned more things all the time awesome Bill Leonardo have a nice day

[@gregoryrogers-h4j]

buddy yr a bloody legend ive tried for years to learn this and i watch yr video for ten minutes and im sorted clear instruction nothing left out even a dumb buga like me can understand it much appreciated thanks heaps😄😄😄

[@Mfil]

Concise and straight to the point the way these videos should be. IMHO an excellent explanation on the different functions of these components..

[@sightech2353]

With love from Uganda. Much appreciated for the time taken to create this.

[@Zoofactory]

1 1/2 Days on YT looking for this video. Proof of Work always earns a Sub!❤

[@WILLY52368]

There have been video''s I've tried to follow along or tutorials where the person explains or try to explain what he's doing but I can tell you honestly there has not been one as much your video that I've watched where I can truly learn and remember something and apply it. What a very good instructor you will make or already are. For me a manual takes forever because of my disability to reading and memory loss where as soon as I done reading a sentence I forget what I just read. Bottom line is that you for sharing your talents with mechanical community out here who strive on repairing their own and getting satisfaction when all goes as plan because of unselfish people like you, Thank you

[@jonglee7]

I don't usually comment. But You helped me to fix my bike. Thank you so ~ much.

[@Paul-uf2ou]

That is just what I needed to know , the DC stater and DC CDI. I have a 700 Polaris giving charging problems, the stater wires have been readapted to another controller so I needed to understand how it works to fix it. I thought it was AC for a start. Thanks for a great explanation.

[@johnduff36]

Best video explaining stator testing Ive come across yet . Thank You

[@JanStreicher-j7t]

Probably one of the best videos I have seen on stators. Thanks a lot for your effort.

[@RollingWrench]

Wow, thanks!

[@frankfazio9024]

It been a while since I haven't see a so complete explanation of a system, very good job 👍

[@davidjoaquin141]

Hey Rolling Wrench, Thank you for this informative video. I just changed out the Stator in my Yamaha 2000 VSTAR 1100 motorcycle. Last year my go to bike shop mentioned to me the bike isn't charging properly and its time to replace the stator. So last week I did it, no biggie right but now I know why they want $700 to change it out, its all labor. I haven't started it yet because I'm waiting for the new battery and I haven't put oil in it yet either. So I have the older stator and I was going through the various test that you thoroughly describe, its a 12 volt 3 phase stator. The stator resistance, was 4 ohms, the requirement is .36 to 44 ohms, it appears low and this may contributed to charging issue. But I believe the issue with it is when I tested the pickup coil resistance, it requires 189-231 ohms. There are 2 wires in the pickup a gray and a black, I switched my analog meter to 100k and tested it. Can I assume the gray wire was equivalent to your blue wire and the black is ground? My reading was nothing at all. I assume I'm doing this right, I think the pickup coil is smoked and attributed to the charging issue. Any suggestions or help would be much appreciated.

[@joshlacy9310]

By far the best and clearest explication. I can’t wait for daylight so I can get back out there and try to solve this no spark issue.

[@scottythomas3473]

Thanx so much man.without people like you a whole bunch of us would have been screwed

[@colonialroofingofnorthcaro441]

I just want to say thank you for taking the time to go through some of the minute things which you find in most videos people don't do it's like people think that everybody just automatically knows and I guess from a certain standpoint certain things people should know but when you point out the very small like the dumb stuff which most people would probably consider that's just common knowledge even in those small things when you go around to the big stuff it kind of brings it all together but I just wanted to thank you because for all of us out here that are trying to learn and trying to grow you know in our brains especially when it comes to electrical stuff the very very small stuff and to teach on a video like you're teaching a 5 year old is probably the best way to do it because if a thousand people watch this every one of them for the most part is going to have one little thing even if they knew everything else one thing is going to stand out that oh I didn't know that and I've had several of those just watching this video oh I didn't know that so appreciate you taking the time teach to us like 5 year olds because when it comes to electrical electrical it can be very confusing and the majority of us don't know much about electrical mine a little bit but not the majority and we don't know a lot about electrical it's a very difficult thing especially when it gets into real depth of running 15 different wires and 60 different places and a mile away in one little vehicle it's making it pretty pretty out there God bless

[@SooLabs]

Wow...this is so good. It's hard to find really good tutorials like this

[@fredsalter1915]

Extremely helpful vid. Thanks!

[@RollingWrench]

Ah geeeze! Thank you soo very much for the tip :-) I really appreciate it. 🙏🏻💯🖤

[@nb6584]

Thank you so much!!! you completely broke this down and made it so easy to understand and saved me im sure 100's of dollars!..

[@brianl2875]

I've been hurting my brain trying to figure out my electrical system. Best video I've found by far, definitely going to sub just because that was very well explained. I'm trying to get my lights working without a battery. I have a 200cc engine with an 8 pole AC stator and can't get DC voltage from my rectifier. I'm just going to end up buying a new harness and stator.

[@josephmichaiah]

Thanks so much for helping me solve some electrical issues I had with my bike.

[@1983bigfrank]

This exactly how video should be made exactly to the point detail information and he's giving exact information piece-by-piece so you will understand this operation in a hole if you never even looked at this before great job my man this is a real video and I needed to know exactly this because I'm can't get a spark out of my spark plug but I changed everything but the stator it started sparking again after a few runs it's no spark again almost like if the spark plug itself is blown but something is causing it and I don't know what

[@briangarrett6264]

GREAT video! Love the preparation that went into setting this video up. Made following everything very easy! Very informative!

[@johnleonard8224]

This Guy. Knows what he is saying. Don't Doubt his word.

[@Romadedoniamace]

Hi👋👋I've watch your previous carburetor video!not like the others , they just want a video likes quantity.they are still hiding some of the secrets know how??? Great step by step learning and innovation!!not afraid to give what you learn and do from you're year of experience!keep up the good work😂more power to you and your guys!🙏🏼🙏🏼🙏🏼

[@JAMTOAM]

i have a atv 125cc tao tao starts runs then after i shut off wont start agian and turn over but it makes a winey noise wonder if stator battery need ti be replace or cdi ??? please help

[@johnnycuellar9454]

I finally understand how things work on all those wires .you explained simple and to the point and repeated thing that you needed to know

[@carlosponce7927]

I say this because I really like following you with or without other people's opinions because most of your stuff is accurate. A lot of people like to do competition with you. Okay cool great but I ain't racing a race car and I ain't got much money

[@samedkat2148]

Finally, best video about stator, thank you! 😄

[@aidanlyons1155]

Good job. Just FYI ,all coils in a magneto are ac, that’s how current is produced. It goes to a rectifier to make DC power if needed.

[@mondude9754]

I think he just called it a DC stator to correlate with the DC cdi box for dummies just because the stator meant for a DC cdi box does not have a capacitor charging coil

[@rjn1749]

Hi I'm no expert in electrical.. can i use the power from stator to rectifier into a headlight? a bit late to ask.

[@williamhaskellhaskell3162]

Hi any word on the timing coil voltage out put ? And will decrease the reluctor gap increase that

[@Bias_Prineus]

​@@williamhaskellhaskell3162voltage is dependent on the rpm but is low the trigger voltage

[@mmholling87]

​@geoepi321975 I don't think voltage changes with rpm, but the ac frequency does. Doesn't the voltage regulator keep the voltage consistent by controlling the amount of ground going into the windings?

[@darwingrose6976]

I have got to hand it to you because you are a perfect teacher breaking it down to understand in simple terms , thanks very much , I now have a much better understanding and have learned a bundle , thanks so much

[@keenankimsey5316]

My cr85 had no spark this video really helped thank you so much

[@Super-Bike-Joe]

Thank you so much!!! I just started motorcycle tech/mech school. This awesome. Thanks again. 🎉🎉🎉🎉

[@thatxrguy9051]

so how can i see if the the stator is bad if we already took the side cover apart? its ac 11

[@eusebiohoskins1553]

Which Magneto and CDI unit do I need for a Honda 1979 XL 100 S can't find the right one online

[@eusebiohoskins1553]

Please help😊

[@Thirdplace4life]

I just did a 97 arctic cat pantera stator because there was no spark. It only has 3 yellow wires coming from it and thats it. I looked up the specs in a service manual which was .0280 ohms. When I measured it showed me 0.4 ohms. I didn't trust it. Nothing looked to be wrong with the stator. No smell of burn, nothing melted ect. SO I put it back in and figured out my own test. From what I learned it didn't matter any combination of wires. I put a meter across all the wire combinations and cranked the engine. Every combination gave me a voltage of about 9-10 volts. (this is because its not running. Running the voltage will go higher) This is how I knew that the stator was good. Anyway, it ended up being a bad ground to the CDI box. Runs like a champ.

[@notamotorbikemechanic]

I'm currently working on a Zephyr 750, for my channel. Getting no spark, so trying to go through everything to find the fault. Thanks for the explanation 👍

[@timpaukstis4324]

Best video I’ve ever seen explaining this subject. Many thanks for putting this together.

[@josharau6012]

Thank you for taking the time in making this great detailed video.

[@gusdogbrownlab435]

Brilliant..just what I needed as I couldn't find any specs for these to test.

[@RollingWrench]

Perfect! I’m glad I could supply the stator specs :-)

[@pelleottosson7308]

Thanks Pal !! Now I Know what to check in the next step for searching ignition problems in my Mercury :D Excellent Video !!

[@larryderuyscher4448]

Thanks for the great video. Just bought my first Rukus and I'll be coming to rolling wrench for parts. Keep up the good work.

[@tamasszabo8947]

What a great job mate. That was an excellent DIY video from A to Z. Carry on.. Thanks.

[@Slobfishn]

Nice info on how Stator on Marine Outboards Work. Helped Me Alot with My 07' F115

[@ray77j]

Good stuff. Very informative for a random video popping up. Working on my TDub and replacing the '01 stator for a new one, just because its apart anyway.

[@JiveMiguel70]

Good explanation of how electronic ignition works.

[@ChristopherRIdleyUK]

brilliant tutorial... I almost understand and have learnt something... thanks for focus

[@RollingWrench]

Thanks for the support

[@lenniewire8029]

Hello , did you say , talking about stators .change from a six volt to a twelve volt . i want to do thot on my SUZUKI SHUTTLE . I need to know wh as t i will need . THANKYOU THIS VIDEO EXPLAINED ALL I DID NOT UNDERSTAND .

[@ChristopherRIdleyUK]

@@lenniewire8029 hi lennie, good to hear from you but i am the organgrinders monkey in all this.. an almost complete mystery,, think you need to add to the add a comment box to get to Mr Wrench hisself.. c

[@tonyginger1245]

What a great video. Clear concise instruction. Top man!

[@seanpadgett3053]

Perfect find on KZbin, rewiring an old Chinese quad and had few issues, last one (but not the next) was no spark. Been at it for weeks trying to figure it out! 2 seconds to bend the pickup closer to the magneto was all it took. Now getting a spark it runs but not by itself, just with start spray, hopefully a carb clean then good to go. Cheers for upload.

[@dauntlessentertainment4922]

hey did you fix it?

[@jimmystanhope2408]

Ya, did you fix it? Did ya?

[@dauntlessentertainment4922]

@@jimmystanhope2408 No sadly i had to send it to the shop

[@HaroonKhan-lu4xu]

When checking carbs see if fuel is getting to jets. If not check pilot jets blow n clean should do trick. Carb spray test bypasses fuel flow.

[@eugeneoreilly9356]

The wire coils on the poles can also short circuit.The copper wire on the coils are coated with a clear insulating coat which thru time breaks down causing a short.You can rewind them using same diameter wire and count the number of rotations.

[@zadokmotorfreight2423]

Holy moly, what an incredible presentation!!

[@RollingWrench]

Glad you liked it!

[@lawrencebullock2024]

Thanks a lot. I’m going outside to work on mine right now I think I know what’s wrong with it I think. I think my coil is bad thanks for the input great job

[@arditagolli5042]

in the final test you got for testing the exciter coil from black and red to ground when unplugged i get zero, when i test those same two wires while cranking i get 48 ish volts. i am unable to use a feelers guage because chinese engineering puts the stator in the end cap but the magneto on the bike. how do i know what is wrong.

[@79series]

Absolutely 10 out of 10 for simple slow paced highly detailed explanation. Very easy to follow. Thanks

[@RollingWrench]

Thank you 🙏🏻 I appreciate the support

[@Kornut213]

OP: You probably figured it out by now BUT just in case And for anyone else whom may not be aware.... The upper plastic of your MM's Leads Come Off, improving reach in narrower spaces. (Having the plastics off would have made the type of testing you do in this video A Lot easier. And avoid the need to use the extra connectors at 12:08.) They either twist or unscrew off, ultimately exposing more of the Metal Tip. Hope that made sense.

[@mikeham1339]

thx for this fantastic explanation it will help a lot of people to fix

[@justinfraziet6843]

What a great video!!! Explained everything so well. Thank you sir!

[@scitecgianni5943]

If you don't now it, you can remove the plastics around the needle ,if you need a longer 😉🤫🤫 thanks for your video dude 💪

[@ruddyrabe]

Thanks for explaining stuff so well EVERYBODY can understand Mattman!

[@rowan359]

amazing, been chasing a no spark issue, on Suzuki marauder vz800 1999, no reading from ground to blue wire on pick up coil, thank you! subscribed

[@taze_ray791fn5]

I am getting spark on my Chinese quad 110cc when i check with a volt meter and turn it over i loose voltage and the starter motor hasnt got enough voltage to start it but when i put on a booster pack (jumpercables) it turnes over no problem please help!🙏

[@mrivantchernegovski3869]

That first stator is the one Iv just put on my 155cc pit bike, so I can run lights, as stock they are just a 2 pole stator for ignition only, Iv modified a gy6 scooter loom, some china Enduro front light and rear light and $20 indicator lights, cheap china switch gear and a small gel battery mounted under left side no plate, it's registered as a 50 cc Forza scooter here in New Zealand, and It's got a motard 12-inch wheel kit and extra rear calliper and KTM hydro clutch on the left under the clutch for rear brake as I love wheelies and in summer it runs on the road on slicks most days,kills everything off the lights with a hole shot lol

[@xNightHawkzx]

First time commenting/liking/subbing bc ur video was mint bro. Very in depth and to the point,, wish I found this video a long time ago.. keep up the good stuff and thanks!

[@Mr.EeToMyself]

Would it affect left coil from firing correct? Perhaps a ground in the loom that’s made on that side of the bike. Sabotage?

[@smoke.tokes420]

thank you so much i love working whit motors but hate wiring bs this helped me out a lot

[@RollingWrench]

Ahh nice!! I appreciate the support

[@johnparsons977]

Man awesome work. Thank you for taking the time to put this together.

[@edgufler1122]

Love this video. Every Scooter owner should have a Multimeter in their Took kit.

[@mulongolino2559]

wow, thank you. however the starter i have has only 4 wires and 8 poles. just wanted to test it before i get rid of it. only a little confused there. some help if possible or link to video or manual for it

[@Don-wf3iy]

exactly what I was looking for ..and you explained it perfectly. Thank you.

[@DAAN_MUSIC]

Maybe somebody knows, my 12 pole DC stator is giving out 15Vac per wire at idle and "only" ~25Vac per wire at WOT. My scooter has a charging issue. But the Stator has been replaced recently. Could the flywheel be the issue?

[@paulalbares643]

A very good instructional video, I learned a lot and am confident regarding troubleshooting this aspect of the bike's electrical system. It is people like you that make youtube an outstanding segment of the internet that is a go to site for me. Keep up the good work.

[@yousuck100nuts]

Have you tested an OEM GET3 stator? I’m having trouble testing the wires since they all run into this black box

[@doobyboy21]

Just subbed ! Exactly the info I was looking for to get my Lifan 125cc engine back to life ! Thankx a million !

[@jepthefish2108]

I have a non starting GY6, with a DC cdi. It has a very weak spark, and there is no spark when I use the kick starter, I know it’s not good for it, but when I turn the engine over using a power drill it does spark, but it’s very weak, and it won’t start. I’m using a drill since the battery is totally dead. Since my bike has a DC cdi, does the bike need a working battery for it to start?

[@cilaptrcili]

tnx bro now i know what is all about,nice presentation dude

[@Siluetae]

Nice job, well presented! lots of good and important info here. However, there are no "DC stators" , due to the fact that ALL stator/coil assemblies generate alternating current. The AC being generated has to do with the dynamics of the moving magnetic field passing through the stationary electric field of the coils. This induces current inside the coil wires that intrinsically alternates according to the laws governing electromagnetism. For clarification, the direct current we measure in ignition systems is produced after passing thru a rectifier which is a set of diodes configured so that only a portion of the sinusoidal waveform gets passed thru to the switch, essentially converting the signal to DC. What we are seeing at this point is actually pulsed DC and what our digital voltage adapter measures is actually the root mean squared voltage which is listed in the service manual spec sheets as Vrms. If you connect the multimeter directly without the adapter its measurements will be rangey and all over the place.

[@celh2656]

thanks for taking the time to explain, very apreciated

[@dennisrobbins657]

What a fantastic informative video, my friend you have earned a subscriber!

[@1eskip]

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) so that I can measure it?

[@belatabak]

Very well conducted now I have better idea 💡 how it works thanks keep up the good work

[@outbackenduro7418]

This is an EXCELLENT video !! I'm subscribed now

[@patricklynch4623]

Úu7

[@rodneyriddell3884]

@@patricklynch4623 cool

[@joshsaxy]

so what if I didnt get a reading when I touched ground on the metal and probed blue/white wire? (The test at 15:45) whats that mean?

[@ruebenbrown5722]

Thank you for this video. Really clear and precise. Cheers.

[@normski262]

Thanks, I am just testing my DC stator. as it to out the dip beam on my motorbike. and when it was runnin g Honda says max V caharging out, should be about 15.5 to 16 V max with full beam on at 5000RPM. my stator is pushing over 20v bang goes the bulb . So as you said I have but my meter in the 3 sockets on the plug, and its all over the place on the Ohm;s 0.01 and 2.5 readings are all crazy seems to vary everytime i put the probe in. I am taking it all to mean the stator is a dead fish.

[@MannyAguilarJr]

The probes(AKA test leads or leads) on the multimeter have caps on them. That's why you only have a little bit of metal probe showing, if you remove the cap you'll get the rest of the probe length.

[@meryllemay-dollschnieder3882]

I have a ?, I have a 50cc roketa and my wires from the stator to connector do not have a ground,its a a.c. 2 phase with yel,wht,red/blk,& blk/wht. How would I test this? Sure would appreciate some help. Thanks 4 all that you do. Love it.

[@beegunvidya5317]

Excellent video, from mauritius😊😊

[@RollingWrench]

Thank you! 😃

[@jacob-67tune18]

thankyou, about to rewind my rmz250 stator, and wasnt sure how to identify it, its 3 poles 1 phase

[@johnkidd4822]

Thanks from John in the UK. i took some photos of your work. i needed to no the value of the pick coil. i found some have different values. kymco 125 pulse coil data says 40 to 300ohms .just asking if a number comes up lets say 104 at 2k 300 ohms or am I using the wrong value . is it in the value. triumph 900 I bought as a non-runner. Pick up coil ? 521 + 40 ohms manual says .reading 571 ohms no spark. bought a second-hand one bike runs .but as a miss firer around 3000 revs on the road but ok standing and revving the engine.

[@MatthewRhodes-d1u]

Great explanation great instructional video all around great job will continue to watch 👍

[@RollingWrench]

I really appreciate the kind words!