"Motorcycle Classics" has an article in the May/June issue, "11 Upgrades for your Classic Bike." One of them is for the YSS PD Fork Valves. Here's the data for your '93-'98:
Model YSS PD Fork Valve # Oil Oil level Outer dia.
Yamaha VMax 93-98 model #360 20W SAE 160mm 43C
and
Model YSS PD...
