What is the max load capacity for a stock suspension 1500? I can't seem to find that info anywhere.
Kawasaki doesn't provide a recommended maximum loading in their specs. With everything stock I think its going to be in the 400-450 pound range... that's inline with the rest of the vulcan line. Also you might want to look at the max load on the rear tire for some guidance.
I was looking at going to Progressive shocks, and that looks like it might be a good idea.
A diet looks like it might be a good idea too!
Yea, I put the 440's on mine. They have performed well for me. I got tired of trying to keep the air shocks set properly.