Only thing i can say is I regret not buying this qs sooner made a big difference on my bike
The Annitori QS2 is one of the top 2 performance upgrades I have made to my r1. I am mostly a track rider and have honestly seen significantly consistent faster lap times since installing the quick shifter. Install and set up was not difficult and customer support has been excellent. If you ride on the track, you need this product. If you ride on the street, the quick shifter is still an awesome upgrade.
Best Quickshifter on the market today, and its also cheap on the scope of QS. Bought for my 08 ZX10R and it works flawlessly, Easy to setup and customize settings. Seriously surprised by this thing.