I'm in the process of installing my z-start and was wondering if the longer cable (that wasn't mentioned when I ordered) for the perch adjuster is needed? In the manual it says some wr450 will need a longer cable but doesn't say what year of bike, mines a 2003. Also how do you know if your bike has a clutch boss spring? Again it says not all wr have one. I looked in my manual and could not see one in the exploded view. I sure could use some help.