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Principally its the same as the old cam / contact breaker system in that at the same point in every revolution a signal is given to deliver the ignition spark at the correct time.
With (contactless) cdi this signal is achieved by a magnet sweeping past a sensor and going via a processor which puts in an adjustment for engine rpm.
The burn time remains the same, so at higher rpm you spark early to peak the pressure at the same point.
With no contacting parts the cdi doesnt go out of adjustment as does the old contact breaker system.
What else can I help you with?
How does outboard motor cdi work?
The link I have provided below this answer will give you the best description of CDI.
What all cdi boxes will work on a 1999 350 big bear?
are there any other cdi boxes that will work in place of 4sh-00 on a 1999 yamaha 350 big bear
What is the market cap for CDI Corporation CDI?
As of July 2014, the market cap for CDI Corporation (CDI) is $287,743,715.28.
What is the symbol for CDI Corporation in the NYSE?
The symbol for CDI Corporation in the NYSE is: CDI.
Will a 82 kawasaki 550 cdi box work on a 750?
depends if they are twin cyl or not
Will a 2000 Yamaha grizzly 600 cdi box work on a 1999 grizzly?
yes
When was CDI Corporation created?
CDI Corporation was created in 1950.
What is CDI Corporation's population?
CDI Corporation's population is 10,000.
When was CDI College created?
CDI College was created in 1976.
How do you test the cdi unit on a suzuki vs 1400?
the only way to test a cdi is to repalce it. There is no other diagnostic for a cdi box
What is the abbreviation of CDI engine?
CDI unit (which is the abbreviation of the "Capacitor Discharge Igniter")
What is the best CDI for raider 150?
for me rextor cdi..is the best for raider 150...
