I didn't want to fool around with shadetree mechanic tricks of getting the crankshaft bolt loose and getting the harmonic balancer off.  I also didn't want to pay $$$$$ for the special Honda tool that essentially includes this tool with the handle bar.  You can use your 1/2" flex head or go buy one at Harbor Freight for less than $20 if you are cheap.  Grab a piece of 1" black iron pipe to go over the handle and you're cooking.