Short stroking the sector, short stroking the piston, swiss cheesing your piston (and other lightening techniques like removing the ball bearings / spring washers on the piston head), using a lighter piston and piston head, and using a stronger spring...
These are all techniques that arise somewhere between and north of 30 to 40 rps (depending on your setup) to prevent pre-engagement (PE) at high cycle speeds. You're trying to ensure that your piston returns back to the front of your cylinder before your sector comes back for another swing at the bat.
There are guides out there on how to achieve this but honestly the best way to do high speed is to dive in and start destroying pistons, gears, etc, and asking a lot of questions.
I've found I've got a better understanding of the reasons behind certain techniques if I actually went and broke something as a result of not doing them first
