I knew it would happen sooner or later. Some dork on the production line at Yamaha played a mean trick on me and put a special motor on my new WR450. This special engine has the spark plug hidden deep inside a cave in the center of the engine. I can only assume, like the batcave, that there is some secret to entering the cave to remove the spark plug, but I couldn't figure it out. The manual gives great instructions: (1) Remove spark plug. Has anyone figured out the secret to entering the spark plug cave?