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Old 06-24-2009, 06:02 PM
matt167 matt167 is offline
Motorized Bicycle Elite Member
Join Date: May 2009
Location: usa
Posts: 420
Default Re: CDI capacitive discharge ignition! what tha!?!

CDI's sometimes use an external electronic trigger, but never off of a points set that I know of.. 2 strokes don't need that kind of timing because they fire every revoloution....

the magneto creates a signal and power that the CDI can use, the CDI uses a capacitor and a resistor to time the energy transfered into the primary windings, then when it fully discharges, it collapses into the secondarys and sparks..

2 strokes don't even need any form of ignition box or timing system.. many chain saws and weed eaters just run off the magneto

Last edited by matt167; 06-24-2009 at 08:59 PM.
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