It’s a high-powered, great quality CDI housed in a Scootronics embossed blue casing for that standard look. Unlike other CDIs this one has two diagnostic LEDs. The red one indicates that your pick up signal is going in, the green one lets you know you’re getting voltage from the low tension coil. Both common faults on scooter ignitions.
Fits and works with both Vespa and Lambretta ignitions.
Also incorporated into the CDI is a voltage controlled boost circuit. Basically making use of the unused negative half cycle of the low tension signal. Because I’m using the negative half cycle of the low tension coil you can, in theory, do away with the copper or aluminium washer on top of the LT coil. People are miss informed that the copper washer is a heat sink. Totally incorrect. It’s a damping washer because the negative half cycle on the LT coil is normally blocked and this stray signal can cause false triggering of the thyristor. You don’t see this copper washer on modern CDI’s as they will also make use of the negative half cycle. The voltage boost circuit is stabilised to 320 volts. This should give you a power rating of just over 100 millijoules. It comes supplied the CDI with 600mm of high-quality flexible HT lead. You just need to replace your original CDI and put your own plug cap on.
Please note this listing is for the blue Scootronics CDI only (complete with HT lead).