Well Yea I could go longer I guess, but I like to tinker anyways.
But I DO hear an audible noise increase after 'bout 50 miles. More noise = more wear?
After I clean the gears and cover carefully with carb cleaner aerosol, I use about a pea sized amount of white grease applied evenly around the primary gear.
When I clean the secondary gear,I am careful about not washing the grease out of the loose ball bearings behind the clutch parts.I just bump the engine over a few revs at a time and wash the bottom section of the gear ,using gravity to pull the gunky stuff away onto old rags stuffed under the engine.
I've been experimenting lately with using some chainlube and less grease. Chainlube goes longer before noise increase but it gets around, if you use a lil too much you will have to pull the pads and clean everything good to stop slipping.
YMMV
Wayne Z