Long term feedback - get it, you won't regret it. A friend of mine installed this in 2011 I believe. Make sure you have a beefy electric or pneumatic impact or it won't take 30 mins.. - butt dyno could easily detect the improvement, and its through the whole rpm range. Also a side note, I noticed a significant decrease in vibration to the pedals with this pulley (clearly far better balanced), and the motor 'spools up' faster when you rev it in neutral because of the reduced rotating mass. It still spools up pretty slow, but its quicker and I found it makes gearing down while braking better as a result.