You don't need any kind of special tools for doing that, pull the plug, then put it again in the cap, hold the cap with the plug on it and make the "hook" of the plug touch some iron/steel part of the bike, like the frame...
Then, move the crank with the kickstarter, and check if there is any kind of spark between the electrode and the little "hook" in the plug..
The best sparks are the blue ones..
Good luck with that!
Greetings from Argentina!
2010 Honda XR 250 Tornado