[DSmithjr]

Petcock set to Prime.

Fuel will drain from the bottom of the float if I open the screw.

Here's my thinking on the fuel issue, and if this isn't correct, please correct me. Whether or not the bike is getting any fuel at all, it should still do something (sputter, misfire, something...) when the starter fluid is applied. If I disconnect the airbox and place my hand on the back of the carb and crank the motor I can feel it sucking my hand in. The motor is pulling in air. I can also place my hand on the exhaust pipe and crank the motor and feel the air being pushed out. I can literally see the motor pulling in the starter fluid vapor when I spray the fluid while cranking the motor. So if the starter fluid goes in, gets compressed (compression test show good compression), and the spark plug fires, something should happen. A pop, a sputter, a shutter, something.

This is the only reason I'm thinking spark. I'm making the assumption (I know what that means) that a bad CDI is sending out incorrect timing information and thus the no start issue. Maybe the spark is happening on the exhaust stroke??? I don't know, that's why it's so frustrating. A compressed mixture of starter fluid and air should ignite if the spark is working. When I say the bike does nothing but crank, that's exactly what I mean. Crank,crank, crank, crank... nothing. It's like there no spark plug in there at all.

Also, if I remove the spark plug and cover the hole with my finger and crank the motor, it will blow my finger off the hole and I can see the fuel vapors escaping from the hole.

If the bike would just sputter on the starter fluid and then die, I would assume it to be a carb/fuel issue. But the lack of any life what-so-ever has me thinking it's a spark issue. Is my thinking here incorrect?