My RM 250 won't spark. The engines been taken

Things to check are

1/ Short out plug wire to good earth to check for spark, if none check rest of sequence. If spark, replace spark plug.
2/ Next check wiring connectors from the ingition module to coil and ensure they are all tight.
3/ This is quite technical but the use of a digital / analogue meter is required.
4/ Place a meter on each wire to the coil and crank (Without spark plug in) there should be some voltage / current flow through the feed wires (Not the earth - Black) If nothing trace back to Generator.
5/ Forgot to mention the kill switch operation, if unsure bridge these wires together.
Other than that the other tests involve sound electrical knowledge and is beyond the scope of the average person.
A thought, if this model has a battery ensure its fully charged.

I must say i thought my bike had no spark so i changed the plug and striped and cleaned the carb i mean main jet out pilot jet out sprayed it full of carb cleaner left it in the carb cleaner over night and the blew all the ports out with compressed air reassembled it and kicked her over a few times and she started the spark is not easy to see