You'll need the new gasket and a couple of dabs of RTV to hold the two grommets in place during reassembly. No loctite, no need to drain the oil, just drape a towel over the heaqder to catch the tablespoon that's going to dribble out. Any metric feeler gauge will work just fine, all you'll really need is the 0.8 mm leaf. You'll need a torx driver to set the gap, I think its a T-30 but I don't remember, it may be a size or two smaller. And, a razor blade to clean off the old gasket.
Loosen the 4 bolts that hold footrest mounting bracket so you can swing the brake pedal out of the way. 8 mm socket pulls the cover bolts. You'll find four tabs on the cover at 10,2,4 and 8 (clock face wise) to help you free the cover which will be on tight. A plastic hammer helps or the wooden handle of a big hammer to use as a pry bar. The alternator magnet is fairly strong so don't let it catch you unawares and snatch the cover out of your hands (trying to avoid a nasty scratch here). It's not all that strong but if you don't know that it can surprise you. The rest is straight forward...the trigger tabs are obvious, just spin the crank, measure the gap (check all of the tabs for insurance), set it to 0.8 mm and button it up.
