Remove Left Crankcase cover
See Crankcase Cover Removal

Remove Drive face nut with a 22mm socket

Slide Drive face off

Pull belt from driven pulley
Inspect for irregular wear

Reverse to install

Put belt around the driven pulley
Hold belt while installing drive face

Tighten nut by hand until it touches the belt

Squeeze belt to widen the driven pulley faces

Apply oil to the threads and mating surface of the nut and torque nut to
58ft-lb
There are a couple of different ways to hold the cover while applying
torque

Belt after installation