[timmy2]

Did you disconnect the cold start injector connector and air metering plate connector while you were in there?
You may have them swapped. (Many have done this)
Cold start injector should have yellow and red/black wires. Air flow switch should have brown and brown/red wires.

Or, you may have pinched and grounded the brown/red wire from the air flow switch somehow.
Disconnect it from the back of the air flow switch and see if the engine starts.
If that doesn't work, disconnect the red/brown wire from the white T connector just below the CDI box(with a red wire)
Keeping the red wires connected and try to start.
Could be a ground in the wiring for the safety switch, or could be the safety switch itself.