250-500cc Flywheel removal tool. Which one?

What size flywheel removal tool do I need for a 2009 WR 300. Everything I see call for. 22mm but it is smaller than a 19mm.

22x1.5.

https://www.google.com/#q=site:cafehusky.com wr 300 flywheel puller

http://www.cafehusky.com/threads/flywheel-puller-09-wr-300.23174/
http://www.cafehusky.com/threads/next-project-6-speed-wr-250.37104/
http://www.cafehusky.com/threads/need-a-flywheel-puller.36663/
http://www.cafehusky.com/threads/09-wr300-6-speed-conversion.22758/

The nut that holds the flywheel on takes a 19mm socket to remove. The hole in the flywheel is smaller than the nut. The nut has a long shoulder that goes back into the flywheel. That's why I said 17mm. But everything and everyone is saying 22mm. Why is mine different? Coild it e a flywheel from something else?

There are threads on the inside of the hole that are 22x1.5

have you got any pictures? some one could of put another ignition on but unlikly considering the age of the model in question.
i was going to put 22 but you stated its smaller.

Thanks, I will order one and give it a try.