I just got a stage 1 Hot Cam for my 98' Warrior. The instructions say to take the inner valve springs out during break-in. Is this a must do? I mean if I'm using a good assembly lube, will it not be ok? Also the instructions claim that if the Cam chain is over a year old, replace it when installing the new cam. Does everyone do this? And for those that didn't, did it create any problems?