I've been wanting to run this type of system. I've seen the PM version that runs the rotor behind the pulley. Don't really want to drop that much $ on it. Exile Makes a chain version but all I've heard is that chain drive is a pain in the a$$. Someone suggested DNA specialty's version of the caliper on the rotor it's about $400. I'm don't know what quality their products are? Ive learned you getting what you pay for. Also thinking the pulley is going to get really hot after a while, can't be good for the belt.

http://performancemachine.com/Catego...spx?display=73

http://www.exilecycles.com/index.php?section=34

http://www.hotbikeweb.com/tech/1002_...dna/index.html

Ideas?