Join Date: Dec 2009
Location: At Southern Motorworx. High Springs Fl
First off I need to correct an earlier assumtion. The 04-08 Kingpin legs have different springs, and cartridges then the 05-08 Hammer.
In 09 the guts of the two bikes were changed to a 2 stage system with a small bump spring, and a longer ride spring. The 09 and up Hammer/KP share the same guts.
All that said the single disk is perfectly good on a KP untill you get into extended twistie riding, and the dual set up has less fade