I think what he means is that the top schock mount bolt on the Indian C5 from outside to inside goes like this: acorn nut, shock, fat seat bracket, frame (corrected) acorn nut, washer, fat seat bracket, shock, frame. We in the US get a different seat and don't get the spacing the fat seat bracket provides to effectively make the top shock mount wide enough to be held squarely and snugly by the shock mopunt bolt. My guess is that piece is 3/32" to 1/8" thick.
So, remove top shock mount, insert a few washers, put shock back on, bolt it up.
I was out yesterday. 65 if fine, it will wiggle if I wiggle the bars but nothing terrible. 70, is fine but wiggling the bars makes an unsettling oscilation that clears itself but makes me not want to go faster. I'm going to take a peek at my bike later, maybe get some washers.
Bradey, any chance of a picture to clarify what they did on your bike?
Scott