Moped cdi box problem

A CDI box is used in motorcycles and other vehicles to store electrical energy and deliver it to the spark plugs to ignite the air-fuel mixture in the cylinders. If your vehicle is not starting or running properly, one of the first things you should check is the condition of the CDI box, moped cdi box problem.

Cdi box keep blowing. ScootDawg's Scooter Forum a. The Dawg Pound. Jun 12, GMT I have a Qlink Pegasus that has blown 3 cdi units recently. I have replaced the cdi units, voltage regulator, ignition coil, pulsar coil.

Moped cdi box problem

In your automotive vehicle, the CDI is one of the most important components. In a motorcycle, a CDI is a black box underneath the seat that functions as the heart of your ignition system. Nonetheless, just like every other component in your bike, issues arise with it and making a diagnosis may be tough. This article presents you with all you need to know about a CDI box. As the key is turned, the rotating magnet induces a voltage of up to Vac into the Excitor coil. When this coil becomes positive, the charge is directed to the forward biased diode till the capacitor gets fully charged usually after 3 to 4 magnet rotations. Once the capacitor is charged, the pulse rotor sends a trigger to the SCR which, in turn, initiates a conduction process that discharges the capacitor immediately. This sudden discharge produces a high spike of voltage in the ignition coil. High current on both contacts of the spark plug is created and this provides power to the engine. Of course, before getting into your CDI, you want to be sure that there are problems with it. Here are some of the symptoms your bike may be exhibiting that point you to issues with a CDI. These symptoms represent problems with particular components of the CDI box.

You should see a reading of between 0. This must be intermittent but today zilch.

The CDI is like a computer as it controls the engine of your scooter. It instructs the fuel injectors when and for how long they should spray. It also directs the spark plugs on how to perform especially when they have to fire. The CDI goes bad because of different reasons. Some of them go bad because they are old, others experience a wiring short while others go bad because of a faulty charging system. The CDI in your scooter is linked to the ignition.

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Thanks in advance to any who can help me and sorry for my bad English. This is my story: I have a malaguiti f12 and one day when i'am rolling I noticed that my scooter stay accelerates a little bit when I stop acceleration stop adding gas and the performance is not that good and sometimes it's stuttering.

Moped cdi box problem

The CDI is like a computer as it controls the engine of your scooter. It instructs the fuel injectors when and for how long they should spray. It also directs the spark plugs on how to perform especially when they have to fire. The CDI goes bad because of different reasons. Some of them go bad because they are old, others experience a wiring short while others go bad because of a faulty charging system. The CDI in your scooter is linked to the ignition. Therefore, if it is in good condition then you will have fewer or no issues with your ignition. It plays the role of storing electrical charge and increasing the spark power on the spark plug. Sometimes, a bad CDI does not cause sparks at all. Again, when a CDI box is about to go bad, it can lead to misfires, issues with starting, rough running or even stall the motor.

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Has the bike ran before or how long does the cdi last until it fries? Cold testing is when you run diagnosis on the CDI box with it disconnected from the stator, while hot testing has it still connected to the stator. In conclusion, testing your CDI box with a multimeter is a relatively easy process. It will probably be worth your time you run through the carb yourself and double check their work. Is it possible for a bad coil to ruin a CDI? Which is what led me to the carb. I got an order processing email right away. The previous owner was a moped rental place where my son worked. Can you start a motorcycle without a CDI? The tires may be inflated to the wrong pressure. Here are the steps you need to follow:.

I am getting a lot of people asking me, if their scooter has a restricted CDI, how to check if it is restricted and how to derestrict it. To get one thing straight: Only 50cc scooters have a restricted CDI. I have never heard of a bigger engine model with a restricted CDI which is being shipped like that if you know please leave a comment.

I ordered, 2 weeks ago, the CDI from Mopeds but have not received it. Not sure exactly what this means but it does indicate a leak. Next, connect the red lead to the positive terminal on the CDI box, and touch the black lead to the ground. I don't know what that is or where to look and don't see anything on the wiring diagram to indicate an HR Coil. The CDI can cause similar issues and I would assume the "shop" that worked on it would have done a proper tune-up and alleviated any FUEL problems but you claim their integrity is suspect. How can I tell that my CDI is bad? Leak point indicated by red arrow. ScootDawg's Scooter Forum a. The CDI is likely working just fine. New Website www. Street Scooters. Scooter videos. I've tried to contact Mopeds but based on past experience I don't have a lot of confidence they will return my call or email. I agree to the processing of my data in accordance with the conditions set out in the policy of Privacy. Newsletter Cart 0.