It is pretty easy you have to take off your exhaust pull off the recoil houseing and oil pump and it is right there, should only be 1.5 hr to do from start to finish, i just did it on my old sled a couple weeks ago.
Well I pulled my recoil housing off to my amazement, the nut that holds dogtooth together, fell of and took my water/oil pump belt out, chewed the hell out of I should say, no damage occured to any of the cog teeth on the engine side or the waterpump side.