You need a few things to bring you flippers up to their full potential.
1. get a flipper rebuild kit, but NOT the one made for Pinbot:
https://pinside.com/pinball/forum/topic/vids-guide-to-upgradingrebuilding-flippers
2. and most likely you need a new coil too (1% chance it's the coil stop or eos, but.....not likely)