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Greetings, dear friend, The three yellow wires you mentioned indicate that your stator is DC-based and not related to the ignition system. If you plan to use a custom CDI, you need to build the newer version, which is DC-based (refer to my latest video on the channel) To understand this better, I recommend watching my videos on regulators and identifying different types of CDIs (available on the channel) Best of luck!

Hi ,my friend Primary winding (diameter 0.33 to 0.38 mm): 0.33 mm is approximately equivalent to AWG 28. 0.38 mm is approximately equivalent to AWG 27. 2. Secondary winding (diameter 0.20 to 0.25 mm): 0.20 mm is approximately equivalent to AWG 32. 0.25 mm is approximately equivalent to AWG 30.

@MrWolfDiy Muchas gracias Amigo excelente tu trabajo

Greetings friend, Yes, it is usable in models equipped with a CDI ignition system.♥️🙏

My pleasure 😊

❓🙏

Hi, This circuit can be used in multi-cylinder engines with slight modifications (I will demonstrate in a separate post). It is possible to use one CDI unit for every two cylinders. However, using it in cars requires careful consideration, as the revolution in car cylinders varies, and the ignition timing differs

Thanks for your positive input ♥️🙏

Hello, my friend. I haven't done this so far, and I'm not sure about it, but I will research it🙏

Something around 10,000. The transformer plays a significant role in spark power.

@MrWolfDiy nice so in theory of I put a bigger transformer I technically should get a higher max rpm?

A transformer is effective in ignition power. To achieve higher RPM, a microcontroller version with a capacity exceeding 20,000 should be used

@@MrWolfDiy ohhh understand thanks

Hi, Yes, to operate the CDI, a pulse trigger is required through the pickup trigger wire. In motorcycles, this is done by the pickup as the flywheel rotates. However, I used a permanent trigger circuit for the stimulation, which I didn’t show in the video because it wasn’t related to our topic.

@@MrWolfDiy AH, I UNDERSTAND SO YOU USED ANOTHER ELECTRICAL CIRCUIT CONNECTED TO THE CDI THAT YOU MADE SIMULATING THE ACTUAL STATOR PICKUP, FROM WHAT I UNDERSTAND..

@@MrWolfDiy so you simulated the stator with pickup and flywheel of a scooter with an electric trigger directly by connecting this self-made cdi

@@MrWolfDiy Does this CDI have a limiter? Is it ok for a fixed advance stator or also for a variable advance?

Yes, you can use it.

Yes, typically, precise programming needs to be done for the chosen microcontroller to determine the timing of the spark at the right moment. However, it is also possible to perform this task without a microcontroller. Your crankshaft position sensor can exactly perform the function of the pickup in a motorcycle, triggering the CDI to generate a spark on each revolution. But it requires precise installation and accurate timing adjustment, and you might encounter some challenges.

Thanks ,If you mean the Ignition coil, (which is cylindrical in shape and its wire is connected to the distributor), then yes, it is possible to use a car coil as well.👍🙏

Hi, The ignition continuity is triggered based on the engine RPM by the motorcycle's trigger. Normally, this is not the case, and I tested it by triggering it with another circuit.🙏

Thankful 🙏

As I mentioned earlier, (in the future) I will create a microcontroller version that includes a dedicated limiter. It requires coding and obtaining some components, but it will definitely be done in the future.🙏

@MrWolfDiy ok i will wait

The performance of this type of transformer is different, Everything you needed to know about the transformer is explained in the video and Make sure to read the description as well.

you welcome 🙏

The microcontroller version includes a standard speed limiter, which I haven’t built yet. However, I will cover it in future projects

If you’re going the microcontroller route, let’s have the rev limiter and a switched lower rev limit for launch control ( could use a strain gauge or a micro switch with this lower limit for quick shifts). As always good work, keep it up.

Welcome

Thanks 🤗🙏

It depends on the type of motorcycle. If your motorcycle uses two separate pickups for each cylinder, you can use a separate CDI unit for each cylinder. However, it ultimately depends on your engine.

@MrWolfDiy plz share your mail id

Having more phases is not related to the ignition system. Please explain more clearly so we can understand what you mean،🙏

@@MrWolfDiy I know this one is timed for engine, would voltage drop if would be several more phases srom stator?

@11T872 No, the number of stator phases is for the motorcycle's charging and lighting system, and it does not affect the voltage. Typically, motorcycles with more than three phases have DC power and do not use alternating voltage at all. The ignition system operates with the battery.

Hi, If your ignition system is of the old contact breaker type, it needs to be upgraded to CDI, which requires replacing all the ignition components, such as the ignition coil, flywheel, stator, and others. However, if your motorcycle is a later model already upgraded to CDI, you can use this CDI, but be aware that the performance of your motorcycle may change. A more thorough examination is needed.

@MrWolfDiy already upgrade to cdi . Single CDI with double ignation coil running is good but one cylinder sport plug is damaged frequently

Hi, If your motorcycle has two pickups, you can use a separate CDI unit for each cylinder. Since this circuit is designed for a single cylinder, If you are using separate CDI units for each cylinder, the trigger angle for each CDI must be adjusted according to the position of its respective cylinder and the required timing. The trigger angle is a crucial factor in synchronizing ignition between cylinders. Precise adjustment improves engine performance, increases fuel efficiency, and reduces wear on components. good luck

@MrWolfDiy thank you

Glad it was helpful!🙏

Greetings dear friend, For old carburetor engines, you can use a CDI. However, there are some points to consider: 1. The CDI must be DC type. 2. You will need one CDI unit for each cylinder. However, it is possible to use one CDI for two cylinders as well. 3. Timing must be precise. A crankshaft sensor is required to trigger the CDI so that the spark occurs at the piston’s top dead center. In general, it requires skill, interest, and enough time for proper testing.

Hello, Pay attention to the diagram; it is clearly shown there. The diagram is included in the video.🙏

The RPM limiter is a separate circuit that is added to the CDI. I will teach how to build it in future projects. However, if you use the 12-degree output from this cdi, you will have the RPM limitation.

@@MrWolfDiy but how?

I’m planning to build a CDI unit specifically for two-stroke motorcycles, and if possible, I’ll add those features you mentioned. Coming soon!

Greetings friend, It is likely that the thyristor has been damaged due to overheating. You should use an appropriate heatsink, and also, the capacitor value should not exceed the thyristor's maximum rating. The nominal voltage is 600V, but typically 250V to 450V is suitable. Another point is that the circuit is sensitive to short circuits, so after testing the health of the circuit, it should be placed in a plastic box and immersed in epoxy resin glue until it is completely dry. The procedure for testing a thyristor with a multimeter is as follows: 1. Remove the thyristor from the circuit. 2. In normal operation, the thyristor should behave like a diode. 3. Connect the multimeter probes to the two terminals of the thyristor. If the thyristor is healthy, it should show low resistance (around 0.6 to 1.5 volts in diode mode) in one direction (from positive to negative) 4. In the reverse direction, it should show high resistance (infinite or very high resistance) 5. If, when connecting the multimeter in the reverse direction, it still shows low resistance, the thyristor may be damaged. and Check the diodes as well.

@@MrWolfDiy Hi friend, Thanks for your generous sharing and suggestions. You are a very experienced. Like your youtube channel. 😀

You're welcome, I'm glad I could be helpful to you, thank you!♥️🙏

Hi and welcome, In some Vespa models from the 1980s and later, which are more advanced, CDI can be used: Vespa PX 125 and 150 Vespa T5 Vespa Cosa And a few other models... But Older models also have the capability to be upgraded to CDI.

@MrWolfDiy Yes, I mean the Vespa px150, thanks for the information

@@MrWolfDiy sorry, how about the durability?

the essence of all CDI units is this very circuit. And Some may be more complex and have higher or lower power. Its durability depends on the originality of the components and proper assembly. Using a suitable heat sink for thyristor and insulating it with epoxy resin adhesive contributes to its longevity. Even if it does break down, there’s not much to worry about, as the cost of making it is very low.🙏

@@MrWolfDiy yes, thank you very much, you are very inspiring 🙏

Hi, This CDI works with AC power. The DC version will be released soon.

Thank you for sharing your opinion.🙏