How much Fork Oil is Optimum on 03' Vstar 1100 Custom?

Question

In each. For the best rebound and ride on rough roads.

Answer 1

What does your manual say.  Don't know about a custom, but an 02 classic 1100 takes 0.464 L of Yamaha fork and shock oil 10W or equivalent

Answer 2

To answer that, we would need to know the road in question, your weight, whether or not you are dripping wet, and if you had breakfast that morning.