the shock is like that cuz when it compresses it dosent go up and down it goes up on a bit of an angle witch pushes the bike forward witch makes u go faster.
do both becouse with the shock cover it only covers the coil and the tube fender will keep mudd out of the bolt and what not, but you think this linkage is bad in the mudd lol try cleaning an 09 rocky mountian flatline, sucks maddd dick man