Ok, without being by my computer there is another way I found quite simple I didn’t see listed. Forgive me if I looked over it.
1. Click the midi track
2. View piano roll
There’s a drop down on the top left of piano roll, “view only selected note” click on the keys going down the left side to find your kick. You’ll be left with only those midi “kick” notes in the piano view.
Towards the bottom on the piano roll view there is a way to “click and DRAG UP” another window resides there, (sometimes it’s already there just really small) you will have velocity lines under each note. That window can be as big as you want.
There’s a lasso looking button on the side (if my memory strikes me right)
Hit your “select arrow”
Highlight all the notes visible which should be your kick only.
It will wrap all those velocities.
Then just drag all the way up to your desired Velocity. It will max them ALL if you go too far, or if you have “light and soft hits” it will keep them the same velocity until you reach the max (120 I believe), it will pull the rest up to max too.. all else fails - edit undo.
Not the best explanation being away from my computer. But this process has allowed me to level and/or max all drum pieces hits in under a minute.