OK. I had a bit of a rough landing the other weekend, Had a Eflite electrict retract fold on me. To make a long stroy short my Zero noised over, In the process the muffler outlet dug into the ground picking up some dirt. When I put the plane on the stand to remove the wings the dirt fell inside the engine.( I noticed the dirt as I was flipping the plane over). When I got home I took the engine apart and used a parts washer to flush all the dirt out of the engine and relubed with 2 cycle oil. I had to replace the base gasket as it was destroyed in the process.

 Now that i have the engine back to gether with all new gaskets, and picked up a Jtech wrap around for it and a Tach. I installed it into my test bench and nothing. I can see the fuel being drawn into the carb and the plug is wet, but there is NO spark. I tried a new plug and still no spark.
I am using NGK CM-6. The engine was running fine when I took it apart. 
 
I took extra care not to get varsol on the sensor and removed the carb and the reed cage when cleaning.

I guess my question is, how do I test the sensor and the CDI to make sure the problem is not there?

Thanks in advance