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My 84 TRX200 has no spark. COuld it be a problem with the on/off lever? Also can someone tell me exactly what these 2 parts do exactly?

http://i28.photobucket.com/albums/c2...fl/Igniter.jpg
http://i28.photobucket.com/albums/c212/Joshwfl/CDI.jpg

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i know the second picture is your pulse generator. It is connected to the camshaft and tells the cdi when the engine is on top-dead-center of the compression stroke, not the overlap stroke. This is so the spark is in sequence with the cylinder compression and not 360 degrees off, because 4-strokes fire every-other complete revolution, and you want the spark to occur at that time, not the other TDC, which occurs after the piston moves up to push the exhaust out and just before it starts going back down to pull in intake air. A spark at this TDC would be useless, but the new 4-strokes spark at this time too to burn any extra gasses in the exhaust stream going out, but it has no effect on power.

The first picture i'm not 100% sure on, but i bet it's the main CDI box, which has all the circuitry (transistors, resistors, diodes, etc.) to make the spark happen when the pulse comes from the pulse generator, the CDI box controls the charge time (dwell) and the firing of the ignition coil.

either way, BOTH parts are related to spark control, and both could be your issue.
good luck