A sharp hammer blow to the wrench should break it loose. Be sure you are hitting it so the plug turns counter clockwise. If it is hard to remove, the last person that changed the oil installed the plug too tight. A good rule of thumb is the "two finger" tightening method. Just use the force of two fingers on the end of the wrench to tighten the plug. That's all it takes, and over tightening the steel plug in the aluminum case can pull the aluminum threads.
Keepin' all the left over parts. Gonna use 'em to build another bike!
6 point metric socket on a long handle socket wrench will reduce the chance of rounding off the plug's hex head.
2009 Honda Rebel 250; 2009 Honda Shadow 750 Spirit "The bravest thing for me to do is admit when I am wrong" - unknown HRF Answer #1 You should take the MSF Rider Course HRF Answer #2 You need to clean your carburetor HRF Answer #3 Sorry we assumed if you didn't say otherwise