Pull the chain guard off. Bend the safety tab up off the nut. Put transmission in first gear.Get a 36mm socket and ratchet and turn counter clockwise. Install new sprocket in reverse order. Very simple.
You do have to loosen the chain and then re-adjust it accordingly for the new sprocket. Unless your chain is Waaaay out of spec/adjustment you will need the extra slack....then you will also have to adjust for proper slack once installed.
It shows how to do this simple task in the owners manuel
61 ft. lbs.
......and if you don't have an impact wrench you can (as I did);
1. Put tranny in first gear.
2. Set the emergency brake.
3. Use something to wedge in the rear brake rotor to brace up against the caliper mounting bracket (I used a pad lock, worked great both off and on).
Once you loosen the 4 bolts on the back of the swingarm, take the allen wrench and wedge it through the sprocket to one of the holes in the side of the carrier. Put it in nuetral and roll the quad (foward to loosen and back ward to tighten).
pretty simple design.....thats why the went to it....that why honda has been using it for years. The chain adjustments of past quads (my yfz, 660, banshee, warrior,and g/f raptor 350) all sucked and you could mess them up.