CDI BOX: AC vs DC performance vs stock

Replacement AC cdi box:
www.rollingwrenchdenver.com/p...
Replacement DC cdi box:
www.rollingwrenchdenver.com/p...
Performance AC cdi box:
www.rollingwrenchdenver.com/p...
Performance, adjustable timing AC cdi box:
www.rollingwrenchdenver.com/p...
Replacement ignition Coil:
www.rollingwrenchdenver.com/p...
Performance ignition coil:
www.rollingwrenchdenver.com/p...
The CDI box in your ignition system is a vital and important to understand part. In this video we will cover:
1. What is a CDI box?
2. How does a CDI box work?
3. How to tell the difference from a AC CDI box and a DC CDI box
4. What does a Performance CDI do?
5. CDI box wiring
Please leave a comment on what videos you would like to see next

[@Ymon25]

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

[@RollingWrench]

Thank you 🙏 that means a lot! I appreciate the support

[@suzieake]

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.

[@suzieake]

The original CDI would fire at low RPM (kick starting), but not higher RPMs (idle), so the bike would fire but never run for more than a few revolutions. We worked with the carburetor for way too long before we decided that it might not be getting spark at more than kick starting RPMs.

[@ralphshumate6024]

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.

[@RollingWrench]

Perfect! This is why I do these videos, for comments like this! Thank you 🙏

[@joshlacy9310]

Electrical diagnostics can be frustrating for sure

[@thatbiguy1975]

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

[@andycumberbatch4140]

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.

[@RollingWrench]

Sweeet! Thanks for the support 🙏

[@ZuhalFAst]

Agreed

[@zado3145]

I need some help

[@zado3145]

​@@RollingWrench can you please help me out with my scooter

[@RollingWrench]

@@zado3145 yes no problem: www.rollingwrenchdenver.com/products/rolling-wrench-tech-support-help?keyword=tech%20

[@rashadngitong4062]

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

[@johncarreiro2960]

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.

[@erikbillig8509]

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

[@zlatkospilja257]

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

[@lenBrill1971]

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

[@marknelson530]

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.

[@klausbrinck2137]

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...

[@claudio67362]

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

[@RollingWrench]

Thanks you for taking the time to write this. I feel your frustration, I’m glad you learned it on your own. I am happy to help others understand. Thanks for the support 🙏

[@harriteppo4414]

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

[@RollingWrench]

Thanks for taking the time to leave a positive comment. Thanks for the support 🙏

[@satishvasane6812]

Thanks for letting me know about the CDI

[@bobkinney2430]

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.

[@b1zertoon910]

Do you know which performance CDI will be best for 150cc dc?

[@watercarepro9610]

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

[@RollingWrench]

Thanks for the support 🙏🏻💯

[@elwhiteboy6865]

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

[@rbrewer6148]

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

[@RollingWrench]

Sweeet! Thanks for the positive vibes 🙏

[@georgebennett7907]

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

[@honeyglazeham9621]

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

[@lucianoa787]

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.

[@nevilleclark8633]

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

[@derricks8352]

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

[@panasync2134]

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.

[@robertautry5978]

I recently got a 1986 kaw Concourse and cannot get fire at the plugs.? Voltage from IGN to CDI box 12v or 9v for security, I have heard that there's a diode on IGN that reduce the voltage. Have juice at coils. It's the only one I can not seem to crank. Bumbing me out.

[@eugeneoreilly9356]

Diodes aren't used in a circuit to alter voltage,resistors are.Diodes conduct current in one direction only,like a one way valve.Voltage drop over a diode is usually 0.7 volts,unless it's a Zener diode.

[@PWGLiu]

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?!?

[@benmurphy7182]

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

[@wakeuppeople6446]

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

[@tripyramidpictures9224]

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.

[@tyroneroberts2692]

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

[@adamried1367]

That was a great video learning and very understanding for sure

[@jamesstanley5503]

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

[@0dbm]

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

[@RollingWrench]

Thanks for the feedback :-)

[@Naught359]

Thanks, good video. Helped me make a purchase.

[@GalaxyAbdullah]

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

[@RollingWrench]

Thanks for the kind words

[@dylanlathrop9837]

U killed it.that made so much sense.

[@RollingWrench]

Thanks for the kind words :-)

[@zadokmotorfreight2423]

Excellent video! Appreciate the time and effort!!!

[@RollingWrench]

My pleasure!

[@damndaniels4039]

Thanks ! You really hellped me

[@thekingofkings777]

Love your vids always learn a lot on the ole GY6

[@RollingWrench]

Thank you for watching

[@cartsquads47]

Damn good video! EXACTLY what I needed to know.

[@tshegosepoo7650]

Thanks a lot for the video clip, very helpful.

[@maartenmtr3022]

Thanks very helpful

[@loydsmith3293]

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.

[@RollingWrench]

Thanks for the support 🙏. I’ll work on that video

[@larrystancombejr9590]

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?

[@user-ru1kh1hn6z]

Thanx. I realy learnd alot about ignition system.

[@billwagner8520]

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

[@jamesausbrooks6337]

Thanks. Very helpful video!

[@kimoarmstrong3519]

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

[@nelsonchavez9085]

Very clear explanation thank you.

[@fitzwater504]

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.

[@d.m.3259]

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!

[@timstarks3714]

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.

[@michaelangelo329]

Nice My natutunan ako 😁 I'm Also Electrician Thanks 😊

[@bruceclark5627]

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!

[@altoncobb5409]

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

[@kuyaMongi]

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

[@JohnnyRedmond]

Great video! Thank you.

[@J.Crooner]

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.👍😎👌

[@jerrybigrig9475]

Did you get it running ..??

[@J.Crooner]

@@jerrybigrig9475 No still no luck. I did discover today that for some strange reason my rear spark plug coil shuts down all electrical power to the ATV only when it's connected to the spark plug depending on how you move the coil. Under normal circumstances it's nothing really unusual about that but I'm not understanding why all the electrical power would shutdown because of a simple spark plug/coil connection. I don't have any spark from both coils. I never could of imagined that a battery could cause this much electrical damage and confusion.😳

[@ianwilkinson5549]

Brilliant video thank you.

[@herkko61]

Very good info, thanks!

[@RollingWrench]

Thanks for watching!

[@user-ct1ks4gj7n]

You are legend sir !

[@timsimmons9026]

Awesome video thanks

[@josephhernandez5174]

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

[@stephenwales6715]

Love helped me to understand thanks

[@lakhdarmessaoudnacer9201]

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

[@Matt-yw5dp]

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

[@justinbowles4671]

Nice video! Thanks

[@andrewmiller37]

Good explanation buddy it does make sense. Thank you

[@RollingWrench]

Thank you 🙏

[@sabareeshv9813]

U go n fuck

[@anthony-gk3ik]

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

[@leonrawiri3826]

Brother awesome explanation. ..

[@RollingWrench]

Thanks for the support!

[@mahendra3052]

Iam very happy with ur video's

[@vidarbraten]

Great video thanks

[@Sanco1927]

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

[@jackfrombg4498]

very good explanation

[@TerrenBichard]

Great job.

[@darthjar9117]

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

[@MrJockito]

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!

[@RollingWrench]

👌 ooohhhhh how I love Thailand!

[@jolizgelacio3032]

they simply use Cheap stock Cdi from China.. Lihua or Lifan CDi that gives Unlimited RPM but some needs conversion... if u want simple plug and play performance cdi buy dual band cdi w/c is costly

[@rijuantony1561]

Super Video Thanks.

[@rossnhojrossnhoj9446]

Very well done shown and explained --Thanks

[@RollingWrench]

Glad it was helpful!

[@munkeemunks]

Great video guy. You definitely deserve my subscription. Anyways i gotta ask, i have an old hyosung RX 125 that i am restoring. I noticed from the manual it states that it has dc cdi. They all look so similar. However Because parts for this bike is rare where i am. I was wondering if i can use other dc cdi from another motorcycle with my system? Like from other mopeds. Thanks and much obliged.

[@nicolec7290]

Very helpful. Thanks

[@SGOfficial265]

Thank you. This is really informative. 👍

[@mahindaherath2818]

Thank you Sir l learn lots.

[@kevinashley5707]

Good job 👏

[@leebanglos3195]

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

[@anthonytrusty1229]

this is good video the cdi box

[@edwardfourie9409]

thank you now I know the diagram from stator to cdi

[@joeazigazi1802]

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

[@robertgonzales5515]

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.

[@scottlovelady8950]

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

[@mustafacirak21]

Teşekkürler bilginiz için.

[@budmccallie3712]

good job bro

[@caseyreece6169]

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

[@malsawmtluangavarte2777]

Thanks it helps alot...

[@marcoalvarez5682]

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

[@poolman8676]

Awesome video. Is there a way to test the CDI box?

[@thedaydreamer7972]

Great videos as usual, I have a Lance Venice 150, it came to me with no CDI in it, I have no spark on the bike and I think its beacuse this is not hooked up, the wires are in groups but Im not sure where to start to even FIND these wires to hookup a CDI, and how would I know to order a DC or AC CDI? any ideas to help me? TY again for all you work

[@7minnow]

Great video what’s the green terminal on the coil for then Thanks

[@tommywhite9986]

Thank man

[@vanluice1013]

Very informative video