Not sure what fork it has (2009 F5? Rock Shox?) but usually, there are no clicks and don't force the lever. The lockout blocks the suspension so it doesn't absorb bumps but the goal is to stop any unwanted movement that sucks your energy on smooth flat sections or smooth climbs, especially when pedaling out of the saddle. Unless there is a blowoff valve, you shouldn't ride it locked when it's bumpy though, the hits will put some pressure on the seals and might eventually create leaks.