CDI BOX: AC vs DC performance vs stock 

Its hard to find dudes who explains these stuff so well like you do.thanks for sharing this man, one more subscriber for you!

A great explanation of how the cdi works. After two or three weeks of searching, you gave me a plain and simple way to check my ignition system. Flustered and P Oed' I had almost given up on what or how to proceed. Thanks bunches for a great video. I now have a new trail to follow.

I have been working on JDs for a long long time and believe it or not this is my first ever experience with a 1969 JD SSI system. But thanks to Rolling Wrench it was a easy way to learn about this system. Great teacher and I found his point by point instructions spot on. Just made my job infinitely easier. I am an old guy and I never even saw on of these units until this past February when a customer asked me why it would run. Opened the hood and saw Solid State Ignition and I said s&@t where did this come from? LOL This must have been a year year engine. Thanks for the help.

One of the simplest video I've ever come across.... thank you, this video you made helped me a lot

You have that ignate soul of a teacher,Nowadays i can proudly say i know all this by heart.I am a telecommunication technician and understand how these things work very well.I wish i had seen this video 3 or four years ago when the so called mechanics of Miami got me so frustrated that i decided to learn by myself,i feel i live in the outback,what a disaster..I have been through hell and back learning everything about scooters and motorcycles..I have had 28 motorcycles and scooters combined.I am 52..and nowadays when i watch videos of mechanics i can tell right away who is a part changer ,like the ones i ran away from and a real mechanic that makes perfect sense like you..I give you credit,the highest credit for your true knowledge and will to share it with others..You do not need advertizing because you do know what you are doing and saying,and i am very proud of you..Even though this is something i know very well i want to thank you for your time and dedication..If i had met a mechanic like you,i would not know what i know today..Nowadays i love this,but when you depend on yourself to fix your vehicles without knowing these things , like it happened to me.it gets really frustrating,now at the end of the road i feel i have won a battle..I see more than a few thumb downs on this video,and these are probably dudes who are jealous of your high IQ..Disregard these pigs that only think about eating their next meal..These are the dudes who unethically oppose people like you and me ,because we earn our living honestly with transparency and honesty..When you are good,and you are excellent,you can be showing it all,and yet you will become even a stronger magnet to attract great customers to your business,versus the shady dudes whose mechanical practices suck..i do not do this for a living and i have parts and tools most shops here in Miami do not have and thats embarrassing.For years i heard things from shop owners here that are too frustrating to mention publicly..One thing i do wanna say is, many mechanics would tell me that it would be better to buy a new engine than to fix anything in the gear box.I was not sure about that and one day i bought a 12 ton shop press and people laughed at me.Today after 12000 miles of hard riding i can tell you this.i bought all the ball bearings on line,and i rebuilt a gear box on a 150 cc from A to Z,i replaced every bearing by high quality japanese ones and this scooter glides,way much better than when i bought it brand new,totally smooth like a japanese scooter..i even replaced the ones in the swing arm as well as the gears..to make it even better i mix my own gear box oil using a viscosity chart and the results are amazing..but i have said enough and the truth is you are a great representation of what a mechanic should be in this great nation..Very few like you,you do make a difference,thumbs up and the very best for you,i feel sorry for pretentious mediocre part changers who live on scamming and lying to make a living

Thanks! Using this video and some wiring schematics I was able to replace a $271.90 part (32900-05210) (7 wire) with a $7.49 part (5 wire) and get my brother's Suzuki 125SP running again - after being dormant for about 30 years.

Man I'm new to gy6 engines. The way you explain things makes it so simple to understand how it all works. Thanks for the great information.

In addition to giving a very good lecture on cdi boxes, you also gave a perfect lecture on how to make a good video: Loud, clear and well explained. Great job.

Thanks, some of the most helpful info in a situation with no spark! Great video thank you

awesome job- you did that in a way that almost everyone can understand

Very complete explanation, I liked how all eventualities that one can meet, are axplained in one video, so that I don´t have to "puzzle" my understanding together from several, and often controvercsial-to-each-other videos...

Thanks so much i have purchased 5 a/c cdi boxes till i saw this video now my bike works like a dream

Best expl6I have seen on the CDI. My bike is currently being rebuilt and I am getting a performance CDI. This will also give you more low end torque and High end speed. Amazing what this upgrade can do for your ride.

that was the best video about cdi i have seen..very helpful when you have problem with ignition ..thanx man!👍

Your videos are the best out there, because they explained thoroughly with detail. You try your best to make sure the viewer understands, by using illustrations etc. Thanks! Another subscriber. BY the way, I installed a new Stator the other day (my current one was working, I just thought I’d install a new one), but in the process, I think I may have moved the timing cover, and forgot to put it back to TDC. Now no start.

Great vid! A video about how to test the triger signal would be great too. Not just for resistance but for generated voltage while cranking too. And maybe how to simulate a triger signal with an AA batery to see how your CDI is Ok or at least ok to start your bike.

And again. . . . . .thank you for another well explained video taking the mystery out of CDI ignitions. From Kelowna British Columbia Canada

That's the clearest explanation of a scary issue I ever heard. Thank you.

Hi Rolling Wrench, you have done well, almost missed out on this given , the dc_ ac _ cdi box at the proper time. It sure stagnate everything with fixes and thanks a lot for your help today! You' re the Best?!?

Best vids I've ever seen on cdi boxes thank you so much God bless ya.

love your video clear and precise explanation more people should use your video as a guide to excellence ,cheers!

Thanks for the review. I have an old '85 Honda I'm trying to revive. With all the Chinese junk peddlers out there I was getting confused as to which (AC or DC) CDI unit I needed for my bike. Thanks to your video I'm better prepared to make the correct choice.

Thanks for letting me know about the CDI

Thank you sir you are a gentlemen and a scholar. FYI your CDI being reversed next to the drawing was killing my OCD lol.

Great Explanation. Just what I needed to solve the problem with my Polaris 90 quad. Thanks

Perfect explanation, exactly what I needed to know, and to the point.... Thanks.

Great video like how you explained everything made it easier to understand

subscribed liked and added to favorites. the best video on this subject so far. ur the best. much gratitude

Love your vids always learn a lot on the ole GY6

The most informative video I’ve seen on the subject Thank you so much

Super informative video. So much helpful information, this is my LAST video I'll be watching about CDI's. ✌

That was a great video learning and very understanding for sure

Really love this man 👍 I hope you also have video regarding why batteries gets bloated

Thank you so much for this video. totally justifies spending the extra in your shop.

Hello brother, your explanation is very nice and simple with pictures that,s make easy to understand. Thanks, with all respect

U killed it.that made so much sense.

super informative video i sorted mine out by watching this full respect for your time ：)

Very well done 👍 I have DCI but doesn’t have fire to it when I turned the key

How about an episode on choosing the best roller weights for different riding needs?

Finally someone that explains it to me like I’m stupid.

Thanks, good video. Helped me make a purchase.

Great explanation tutorial on the CDI boxes. thanks for posting. cheers

there are also some CDIs with strange wirings. Some Qingqi use both AC and DC. The DC is only for the microchip. SYM Mio the same but 2 wires changed place compared to that Quingqi. It's an open field finding out all differrent wirings on CDIs. Greets from Germany!

Thanks, very good video on CDI units. I would like to see more information on how the CDI unit rev limits and advances the timing.

Thanks ! You really hellped me

I'm glad you take time to explain stuff very clearly. I'm a big fan and wish I would've watched before I ordered mine. Yup got the wrong one!! Did I damage something by trying to start it?

Thanks a lot for the video clip, very helpful.

Excellent video! Appreciate the time and effort!!!

I love the fact, u touched base on the basic parts of a c.d.I. But, I’m also interested in the racing side details after switching to upgrades. What’s the best. Why & why not upgrade. Is it even wroth switching or is it more then just a quick easy fix to upgrade the ignition system.

Damn good video! EXACTLY what I needed to know.

Incredible video on CDI boxes and how they work. I have a 2010 Brute Force 750 and I was in the process of taking the battery out and before I could detach the battery terminals it slipped and made contact with the frame of the bike. I heard an electrical distortion as if a fuse had blown but all fuses are good and it appears the relays are ok too. Now when I turn the ignition to on the light switch doesn't work or the push start button won't work either and the fan immediately comes on. Also the FI is flashing codes 11, 12, and 14 which have nothing to do with my issue. I also tried bridging the solenoid to see if it would start. It will turn over but not crank. After unplugging the Fuel Pump relay I ran a jumper wire from the input directly to the positive battery terminal to see if the pump would run and it turned on instantly. Another interesting discovery was that when I hooked the battery up to a charger and combined it with the jumper wire to the battery charger positive terminal my electric headlights and push-start button was working again but the bike still won't start. It sounds like it wants to start but just simply continues to turn over. If anyone knows the reason or could pinpoint what the issue is feel free to share thanks.👍😎👌

Thanx. I realy learnd alot about ignition system.

Great video! Thank you.

I am working on a Honda 4TRX300 (that is the 4WD), circa 1996 or 97. The CDI is AC and it is as big as the wrong one (DC) seen in this video. Only one of the wires on the CDI is where and what this video says. Not saying he is wrong, just saying the 4trax is different. Black/Yellow striped: sends power from the CDI to the coil Dark green: ground Light green: is connected to the "reverse" gear switch (I assume it keeps CDI from sending power to the coil if gearing is in reverse). Black/white: is from the run (kill) switch on the handlebar ( and is where the video says it is on the CDI) Blue/yellow: is the signal wire from the pulser (trigger) Yellow: is the power source directly from the stator area. It Ts off one of the 3 yellow wires that sends current from the stator area to the regulator (where it gets changed to DC for charging the battery). The T is BEFORE the regulator, thus, we have an AC CDI.

Hello bro From algeria , , i really apreciate your video , a good one

Thanks. Very helpful video!

Thanks very helpful

Very clear explanation thank you.

You really need to have atleast knowledge on basics how motorcycle works in order to appreciate how clear this dude explains everything 👍

Doing a great job.I always go too your videos...keep up the good work... Oh I am putting a 500 Cc motor in a 150 cc 2008 Chinese scooter. With side car.

Very good info, thanks!

Love helped me to understand thanks

Brilliant video thank you.

good vid! I never stop learning -----if I stop learning i am DEAD!!!!!!!!!!!

Very Good explanation just a few questions what is inside the pick up coil does it send voltage to to cdi?

Great video on CDI’s needing a little help figuring out my GY6 If possible

Awesome video thanks

Nice video! Thanks

Good explanation buddy it does make sense. Thank you

You are legend sir !

very good explanation

Thanks Honda dio AF34 DC cdi 1version ok . I fixed it for 1 week. They write a lot of connections, Russian and Japanese pages, and they are good too. specified, looks the same on the outside but must be measured with a multimeter to be sure

Great video thanks

Thanks! I was wondering how it is working... I am working on a Tuk Tuk in Thailand with a Honda dream 100 engine and the wiring harness has been messed up in a savage way... I fixed up pretty much everything now but I wanted to understand and check the CDI. Great video!

Great job.

Thank you Sir l learn lots.

Very well done shown and explained --Thanks

Some sort of potentiometer for that knob CDi system. Although I never heard dog that but makes sense

That was a great explanation I'm going to use a points and condenser as a trigger for a protect I have this info it's great for it

Love your channel and content!i am buying my first scooter from a dealership and as I've always had motorcycles i know just enough about scooters to be dangerous.does a kymco super 8 150 have a gy6 motor or is this proprietary motor?the ability to get parts anywhere i have a cell signal and get them relatively cheap is a must since my wife will be learning to ride on this as well.she's not a clutz,but with both of us using it it's going to get plenty of miles put on it.hopefully i can catch you on your next live episode.thanks for all your doing!

Good job 👏

How to test the cdi box to see if it is good. Also very good video. well covered

thank you now I know the diagram from stator to cdi

Iam very happy with ur video's

Could you show how to test a cdi Box with a voltmeter? Thanks, enjoyed this video a lot!

I love your videos that explains a lot of things I needed to know..where can I get one for a 05 kymco venox 250 motorcycle on line.i live in sa.tx. keep up with your videos.i live them

Very helpful. Thanks

Super Video Thanks.

Hey there rolling wrench, I'm hoping you can shed some light on a couple issues I'm having from 2 different upgrade parts I installed on my 2006 Honda CRF450X SuperMoto. The first one is my 100watt stator and reg/rectifier kit from TRAIL TECH. What I am confused with is the regulator/rectifier that came with this kit. There are 2 adjustable knobs on the top, one is for setting "delay" and the other is for "voltage". The only info I have on this is from the installation instruction sheet that came with the kit, and that consist of a single paragraph accompanied with a picture of the REG/REC under the title "adjusting REG/REC relay timer" and little red arrows pointing to the obvious, to the dial labeled "delay" and the other "voltage". Basically, all it says is "adjust delay dial cw to decrease relay active time", then of course ccw to increase relay active time, and literally nothing about the voltage dial. Can you help me with this? I mean what relay am I activating for delay time increase or decrease? The other upgrade is a VORTEX X10 CDI. Now like the TRAIL TECH installation sheet, the VORTEX install sheet has it's points of similar vagueness. It has to do with the bullet connecter end grey wire. All it says is; "now plug in the bullet end grey wire". And that's it, all the rest of the installation instructions were complete ie connect this to that, or route this wire from pin "x" to pin "y". So do you think you can help me out with where that grey wire plugs to? Thank you so much for your time efforts and help regarding this matter. Lee

Get a test light. They’re a few bucks and are indispensable. Great video.

Good video. I need some help figuring out if my CDI is bad. I have a no spark on a Panda Trail Rider 70

Our arctic cat 90 4 stroke is DC and has a kill wire next to the hot coming in , the dual plug .

Aye bro love the vid , but which is better for a 125 four wheeler ?

Awesome video!. very informative. I ' m currently working on a LM200 American Sport workers for an elderly couple so can get around their property. The compliant the engine has no power to the spark plug and before it stopped running it was idling to fast. Any help for the couple would be very appreciated. God Blees.

good job bro

My cdi is like the smallest one ,is it possible to loose functions so fast,first was lights then all power...

Hi Rolling Wrench, what performance CDI box (one that really makes some difference) would you recommend for a GY6 engine 4 stroke 50cc scooter?

So... I've got a Yamaha xs 1100 it has 2 pickup coils for ignition..so if my cdi box is bad and no longer available ..I probably could run two of these DC controllers ...??

hi! good day. liked ur video. helped me understand how the cdi works. i'll b testing the box on my bike tomorrow. just dont know if the problem on my bike is coming from the cdi box.the start button does not work.but can still do a kick start. and the reading on the volt meter i installed on my bike while i"m riding is 3 to 6 volts only. but when i use the multi-meter, it's reading the battery has 12 point something volts.. meaning it's still good. i;m not sure if my battery is being charged every time i ride my bike.anyway, just wanna share my problem . thanks again.

I have three connections like that green-,White, blue and red-black, one was not in use as far as I can remember