Electric Scooter Parts - Changing a CDI Module

Probably the most common of electrical scooter parts looking for alternative, the CDI module is really as necessary to the scooter ignition system because the spark plug. Regarded as an invention from the brilliant Nikola Tesla, the Capacitor Discharge Ignition (CDI) may be the standard system utilized on the majority of present day gas-powered motor scooters, and also on many motorcycles, marine outboards along with other small engines. An entire CDI module consists of a transformer, the charging circuit, the rectifier, a capacitor, and also the trigger circuit.

The way the CDI Module Works
The transformer first boosts the current to 400 to 600 volts. Moving across the charging circuit, the electrical current charges the capacitor, using the rectifier stopping the capacitor from discharging prior to the ignition point. Finding the triggering signal, the trigger circuit stops charging and enables the capacitor to release towards the low inductance ignition coil. This boosts the original 400-600 Volt capacitor discharge up to 40 kV in the secondary winding, jumping the spark plug gap, and stimulating the gas/air mixture within the cylinder. The charging circuit will be reconnected and resumes charging the capacitor once again.

AC or Electricity?
Most up to date scooters us an alternating electric current (AC) system nevertheless the popular KYMCO scooter brand uses household power (Electricity). Consequently, electric scooter parts for KYMCO machines, such as the CDI module, can often be difficult to get.

Engine Size
It is usually better to match the engine size towards the CDI specifications. A CDI module designed for a 50cc engine might focus on a 100cc, 125cc, or 150cc engine, plus some are made to function over a variety of engine dimensions. Others however, is only going to work for the engine displacement. Check the specifications to be certain of having the right scooter ignition parts.

2-stroke and 4-stroke Scooter Ignition
The Two-stroke and 4-stroke engines are totally different, and consequently, their engines' ignition timing is completely different too. You can't make use of a CDI designed for a couple-stroker on the 4-stroke scooter. On the other hand, you can't make use of a 4-stroke scooter's CDI on the 2-stroke scooter.

Fittings
On many current CDIs, the fittings are integral towards the unit's situation, developing a plug that button snaps directly onto the scooter's wiring harness. On other models, the fittings might be situated on wires, permitting some leeway on wherever the module is mounted. The skilled auto technician may shorten or lengthen these wires as necessary. The most typical CDI connector style uses two plugs alongside one 4-pin plug, along with a 2-pin plug. These fittings might be square, rectangular, or simple spades.

Note: Photo illustrations of numerous CDI fittings is visible in the website listed at the end want to know ,.

Unrestricted or Restricted?
An unrestricted (or racing) CDI offers the current regardless of how high the engine RPMs go. Because the CDI controls the spark plug, the plug continues to fireplace at high Revoltions per minute. For reasons that needs to be apparent, these CDI models are created for racing use, and therefore are not so appropriate for normal highway use. A small CDI module however, stop firing when a pre-set engine Revoltions per minute is achieved. Without current reaching the spark plug, the engine RPMs slow to underneath the pre-set limit and just then will the CDI resume supplying current towards the plug.

When changing a CDI module, or other scooter ignition or electric scooter parts, it is usually smart to reference your user guide. When the manual sheds or else missing, many producers and types have downloadable manuals on their websites.