They LOOK cool, worked good over stock on a stock bike. But the V Force worked alittle better. Went through a couple of sets of petals in no time at all ! Called Duncan and they said "yeah , they will need to be replaced every 10 hours or so". Im out on that crap! The stock reeds never broke, the V Force never broke, all on the same motor! Better than stock ? YES Worth replacing every 10 hours or so at $50 each ? NO Just my .02 and what ive seen as an engine builder!