Remove Old Levers, Grease Pivot Point of the New Levers. Do NOT Over-Tighten the bolts, they are not meant to be clamped down. Be sure the brake cylinder actuator is properly seated, it should not be overly tight against the piston.
As with any Motorcycle Lever, OEM or Aftermarket, Test the Lever Performance Before Riding. Be sure they are installed properly and allow for normal brake operation. When in doubt have a professional install the levers.