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

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Does your motorcycle, scooter, or ATV have charging system problems? Maybe your engine has no spark? In this video I will teach you step by step how to test your stator and help you understand how the ignition system works. To understand how a stator works you should also know the functions of the pickup coil, charging coils, and the exciter coil. These all go hand in hand when testing a stator. I will teach you step by step so you have a full understanding of testing and functionality of the stator. specifically found in motorcycles, scooters, and ATV / UTV. In this video we will be using GY6 stators also know as qmj157 or qmi152 engines. 125cc, 150cc, and 170cc stators.

[@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.

[@rustyshackleford6259]

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

[@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

[@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

[@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

[@frankfazio9024]

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

[@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.

[@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!

[@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

[@sightech2353]

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

[@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.

[@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 :-)

[@briangarrett6264]

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

[@timpaukstis4324]

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

[@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.

[@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.

[@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?

[@maxwolf6285]

Thank you great teacher. I just bought a new vader 125cc. It's in the crate still. Binge watching your vader 190cc build. Wow what a awesome bike ! I want that !

[@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

[@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 :-) 🙏🏻💯

[@user-ff8ss1oo4q]

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

[@user-ff8ss1oo4q]

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

[@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

[@johnduff36]

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

[@Zoofactory]

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

[@davidstepeck2644]

Thank you so much for this ultra thorough video. Now I totally understand how the stator and electrical ignition systems work, plus how to test and troubleshoot. I wrote down some notes for future reference as well. This video is the “go to” on KZbin for stators. Thank you again!!

[@RollingWrench]

Saawweeeeeet! Thanks for the support and positive words. I appreciate messages like this :-)

[@davidstepeck2644]

@@RollingWrench My pleasure. You took the time to share your knowledge, create, edit and post a video. It’s the least I can do. I watched your video six months ago but came back tonight to watch it again. Keep up the good work and thank you!

[@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!

[@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!

[@scottythomas3473]

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

[@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

[@Don-wf3iy]

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

[@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.

[@tonyginger1245]

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

[@lolobodi75]

Thanks for such thorough explanation, i really enjoyed the video and all the details even the simple once, keep the good work 👍👍, you are a star 🌟

[@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.

[@jonglee7]

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

[@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.

[@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 🙏🏻💯

[@SooLabs]

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

[@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

[@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!..

[@doobyboy21]

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

[@valerievonskullz825]

This is absolutely FANTASTIC!!!! I’ve learned a lot from your video. Thank you very much! I’ve subscribed! 💪🏾☺️

[@slicaltimistic1]

😁He discuss this, and make it so plain, and simple. Now that's teaching. Thank you very much.

[@ruddyrabe]

Thanks for explaining stuff so well EVERYBODY can understand Mattman!

[@tamasszabo8947]

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

[@ibrajimenez2098]

Thank you so much! I'm in the Denver area. I will hit you up once I get a scooter hahaha . Thanks for all the info!

[@josephmichaiah]

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

[@DirectorDavoPaul]

I appreciate the work you put in dude. REALLY helpful. Best teacher for this kinda stuff! The passion is obvious...:)

[@RollingWrench]

Thanks dude! I appreciate your support more than you know 🙏🏻💯

[@josharau6012]

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

[@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

[@Slobfishn]

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

[@edgufler1122]

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

[@johnparsons977]

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

[@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.

[@ruebenbrown5722]

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

[@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.

[@hunterdupont558]

I heard 5 different thing watching this big thanks keeping this video in my files great job

[@MrMannyjr69]

Such great information for us learning more about our machines thank you for your video

[@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

[@geoepi321975]

​@@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?

[@CROTCH_ROCKET_JOE]

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

[@samedkat2148]

Finally, best video about stator, thank you! 😄

[@keenankimsey5316]

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

[@revndevn5437]

Thanks for the comprehensive video; very useful. Regarding the ignition wire coming out of the stator, what voltage should I expect to measure?

[@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 :-)

[@Ethan.Arnold89]

I dont know if you have realized it but the tips of your probes will come off making it much easier to stick them in the connectors.

[@TheOnlyJonno]

So damn good! This video is amazing and has helped me heaps. Deadset legend 🤠🤙

[@countrytownproduction4505]

thank you i did not know the difference between the ac and dc i have learned a lot from this video thank you once more

[@celh2656]

thanks for taking the time to explain, very apreciated

[@pelleottosson7308]

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

[@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 👍

[@johnleonard8224]

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

[@uet7417]

This is incredible information, thank you!

[@outbackenduro7418]

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

[@patricklynch4623]

Úu7

[@rodneyriddell3884]

@@patricklynch4623 cool

[@eduardoamor1753]

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!🙏🏼🙏🏼🙏🏼

[@southern_merican]

Very great video man !, im definitely doing that tommorrow!

[@Mel-ml7eg]

What a good informative video, you have put such good effort in, everything laid out and made clear, Its great that you can share your vast knowledge so others like myself can learn, The section about the difference from A/C to D/C was especially helpful to me.Well done. And hopefully i can get that vital spark back to my bike now !

[@RollingWrench]

Thanks for the kind words and support 🙏🏻💯

[@THEJEDEYEMASTER]

@@RollingWrench why is the video so dark? couldnt watch it. maybe next one.

[@Jimbolo619]

​@@THEJEDEYEMASTERget an eye exam. Lighting was okay! Sorry to hear that.

[@durko4174]

Great info there man, thanks for the effort it took to put together :)

[@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

[@snapsmanden]

Nice explanation, great work 👍🛵 Thanks ✌️

[@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.

[@Josedoggie1962]

Great video very well explained thank you for the knowledge! 👏🏻

[@mikeham1339]

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

[@lilman1796]

Thanks for the video everone, awesome information on this stator. Keep up the great work ☆☆☆☆☆☆☆☆☆☆☆☆

[@zadokmotorfreight2423]

Holy moly, what an incredible presentation!!

[@RollingWrench]

Glad you liked it!

[@JohnDoe-uk6yf]

THanks for this awesome Video mate!!!

[@Treacle1959]

Hi and thanks for taking so much time to explain how the stator works and can be tested. This i by far the best video i have seen and i have learned so much i feel i can go forward and get my bike fixed. I have a SYM SB125 N wolf (carp not injection) I have a starting issue after i accidently touched the red wire on the regulator plug with a trailing wire from the black/yellow wire plugged into my rev counter. the bike immediately stopped and wont start now. BIG MISTAKE !!! I have replaced the reg with a new one and still wont start so i am tied between the sator and the cdi? OR both? i am trying to test the stator (hence i came across your video) . I have studied your video and I am thinking i may have the 2 phase ? but i only have 4 wires. green / pink / yellow in a 3 pin plug and a blue/yellow outside the plug with a bullet connector. NO RED.? so its a big ask but can you identify what this system could be and test / values. many thanks and i look forward to your thoughts Mick

[@MetaloMan007]

I absolutely would give more than a "like". Awesome video man. You rock 😎🤜🏻

[@thomthom5486]

Excellent tutorial. Thank you!

[@ikan4112]

MASTER!!! Thank you for this video is 1000% helpful :)

[@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.

[@JimmyMay-tx9fw]

Great job on breaking it all down

[@belatabak]

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

[@ivaturi1000]

Great video. Well done Continue the great teaching.

[@JiveMiguel70]

Good explanation of how electronic ignition works.

[@racoon126]

Very well made video,thanks!

[@omar101oez2]

Your the man brotha thank you for all your efforts man really appreciate you

[@RollingWrench]

My pleasure

[@Greenwingy]

Great and informative video. Stators have always puzzled me. You talked about the resistance on the pickup coil being specific 130-160 ohms. I have on that is 103.9-104.0 ohms, much lower than the spec that you outlined. Would this low resistance cause my no spark issue when everything else checks out good?

[@jeremysolis3185]

Excellent video! 👍🏼 Thank you 🙏

[@savoielvis1]

Amazing !!!! very interesting video. Made for all to understand !!!

[@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

[@ronhenke5444]

Excellent instruction!! Thank you!