Handy Spark Shorting Device
I made one of these from an old spark plug and a spring paper clip and keep it in the tool bucket under the seat. Take one spring out and bend it so it clamps onto the plug nice and tight and fit it back into the clip like so.
Clamp it to a cooling fin like so and watch the electrode for spark. Or not... :scratch
When you have a no spark condition almost the last thing that goes wrong is the plugs themselves so unless I suspect a bad spark plug I don't bother removing them unless this test fails.