I have owned all 3..but on Tomos A35
Alukit has more bottom than the Airsal..Airsal more top speed
Parmakit more expensive but had both power and speed.
Value for the money..K-Star Alukit for $99
I have Alukit and Airsal of these right now on running peds. I whip them like rented mules. Break in was light coating of synthetic oil when installing, 5 minutes of idle, then 30 minutes of varied throttle up to 35 mph..then whip like rented mule at WOT!!