Have the Healtech Easy installed on 1st Gen FZ1. Advantages include less clutch wear, Quicker smoother upshifts and downshifts gears 3-6 and 6-3. Comes with a bypass plug that allows disabling or for testing. About a 1 hour install tapping into the coils under the tank routing and securing wires to the ECU placed under the seat and making sure the sender is firmly attached to the shift lever bolt with the special compression washers in place. Disadvantages include learning to ride without touching your shifter as any tap even from a bounce can momentarily cut power and if this occurs at the same time as manually clutching it can result in a missed shift at higher RPM then a lurch forward as you realize you are accelerating still in a lower gear. After learning to shift more precisely and firmly without resting on the lever the quickshifter becomes a breeze to use. 1st+2nd gear quickshifts up or down are very harsh and not recommended if you experience this as the manual says then to avoid them. You must have the transmission under load (meaning accelerating or constant throttle) to clutchless shift or you will crunch gears. Once programmed and understood the Healtech Quickshifter Easy is like butter shifting at full throttle like an automatic transmission up and down. Saved me 3/10 in my quarter mile drag times and adds alot of enjoyment and smoothness for spirited clutchless street riding