Categories FAQ

Readers ask: What is a CDI on a scooter 50cc?

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.

How do I know if my CDI box is bad?

Symptoms could include misfiring, dead cylinders, backfiring, bizarre tach behavior, and countless other things related to how your engine’s running. The problem may get worse as the bike warms up. It might not even hold low revs at all.

What is CDI unit in scooter?

Capacitor discharge ignition (CDI) or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors, motorcycles, lawn mowers, chainsaws, small engines, turbine-powered aircraft, and some cars.

What does a CDI box do?

A CDI box works via the voltage from your motorcycle battery, and the electrical load discharges in one operation, starting the ignition and combustion processes. It takes a pulse of voltage passing through the CDI box to fire up the spark plug. These types of boxes have high spark voltage with short duration.

What does a performance CDI box do?

The “CDI” regulates your engine timing and also controls the spark intensity of your ignition system. A high performance “CDI” will advance the engine timing allowing for higher low rpm torque and higher top end speeds. The installation process is simple and the results are instantaneous.

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How do I bypass CDI?

Follow the following directions to effectively bypass your CDI box by carrying out an ignition coil resistance test (“bench test”).

  1. Clear Your Bench.
  2. Remove the CDI Box.
  3. Check the Resistance Specifications.
  4. Measure the Primary Coil Resistance.
  5. Measure the Secondary Coil Resistance.
  6. Compare the Readings.

What is the price of CDI?

2 Wheeler CDI Unit at Rs 300/piece | Motorcycle CDI Unit | ID: 13799074712.

Can a CDI box cause weak spark?

Re: reasons for weak spark on CDI system? The COIL can give weak spark in spite of the spark being triggered by a CDI box. If you have an anemic yellowy spark from the plug then I would suggest to check that all of the connections are clean and tight.

What can cause a CDI box to go bad?

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. How is my CDI? The CDI in your scooter is linked to the ignition.

Is CDI and ECU the same?

The CDI referenced in some models of Polaris is controlled by the ECU (electronic control unit). The ECU is an electronic switch which stops the flow of current in an inductive discharge ignition system.

How do you bake a CDI box?

Heat oven to 200 degrees, put the CDI on the oven for an hour or so, then turn the oven off and let it cool. Plug it back in and recheck for spark. If it still doesn’t work, a sa last ditch effort turn the oven up to 400, throw it in for about 15 minutes and then turn the oven off and let it cool, try again.

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