Only rationale I can think of would be the weight difference between the two bikes. You may need to give Progressive a call if someone more in the know doesn't chime in.
PM vshop (sharkey), he's a dealer for Progressive and works on all sorts of bikes including the Vs, betting he has the answers
PM vshop (sharkey), he's a dealer for Progressive and works on all sorts of bikes including the Vs, betting he has the answers
