The Bolt Lift is the effort it takes to overcome the spring and any friction as it rides the cocking ramp to the cocked position. If you remove the cocking piece you will need to make sure that it is adjusted properly when you reassemble. You could measure the compressed spring length prior to disassembly and return to that if you are satisfied with the bolt lift then leave it alone. If not you need to address a few things. Some you need a lot of experience with some not so much. Friction and spring pressure are the two I would look into. Reducing friction comes in the form of finely polishing properly lubricating any surface that interacts with another. Felt spring pressure in the cocking motion can be modified by altering the ramp angle, and reducing the cocking pin travel by adjusting preload on the cocking pin, read backing the cocking piece out to reduce firing pin travel.