Pete...
I don't have a after market damper on my bike, but I was thinking about you and Wally's question whilst working on mine over the weekend.
What I'd do, is get out a tape measure and locate where the mounting brackets are going to sit. Mark them off with tape so you have a constant point of reference. Turn your bars to full lock and measure the distance between the tape marks. Turn your bars full lock the opposite direction and measure again. This will give you minimum and maximum travel. That should allow you to pick out the correct damper length on the Pro-Flo page.
I don't have a after market damper on my bike, but I was thinking about you and Wally's question whilst working on mine over the weekend.
What I'd do, is get out a tape measure and locate where the mounting brackets are going to sit. Mark them off with tape so you have a constant point of reference. Turn your bars to full lock and measure the distance between the tape marks. Turn your bars full lock the opposite direction and measure again. This will give you minimum and maximum travel. That should allow you to pick out the correct damper length on the Pro-Flo page.