TCI (Transistorized Capacitor Ignition) and CDI (Capacitor Discharge Ignition) are both electronic ignition systems, but they operate differently. TCI uses a transistor to control the timing of the ignition spark and typically employs a coil to generate voltage, providing a more consistent spark over various RPMs. In contrast, CDI stores energy in a capacitor and discharges it to the ignition coil, producing a high-voltage spark for a short duration, which is effective for high-performance engines. Overall, TCI systems tend to offer better spark control at lower RPMs, while CDI systems excel in high-performance applications.
Transistor Controlled Ignition
direct ignition engine
The capacitive ignition, it is a direct ignition.
No, a bike generally will not start without a CDI (Capacitor Discharge Ignition) unit if it is equipped with one. The CDI is crucial for generating the spark necessary to ignite the fuel-air mixture in the engine. Without it, the ignition system cannot function, preventing the bike from starting. However, some older models may use different ignition systems that do not rely on a CDI.
Capacitive Discharge Ignition
Capacitor discharge ignition
Capacitor discharge ignition
Capacitive Discharge Ignition
The 1978 RM250 does not use a CDI (Capacitor Discharge Ignition) system; it is equipped with a traditional points ignition system. This means it relies on mechanical points and a condenser for ignition timing rather than the electronic components found in modern CDI systems. If you're considering upgrading or modifying the ignition system, you may look into converting to a CDI, but it's not necessary for the original setup.
first check your spark plug then test your ignition coil if these are good then it is probably the cdi but there is no way to test a cdi box.
Capacitive Discharge Ignition
Typically, a CDI (Capacitor Discharge Ignition) box generates a high voltage output to the ignition coil, often in the range of 20,000 to 45,000 volts, depending on the system. If you are measuring 116 volts going into the ignition coil, that voltage may not be sufficient to produce a spark. It's important to check the CDI box, ignition coil, and wiring for any faults or poor connections, as these can affect the overall performance of the ignition system. Additionally, ensure that the CDI is functioning correctly and is compatible with your ATV model.