I appologize in advance if this has already been discussed but I can't seam to find it while I search. Will a Reluse z start clutch for a '03-'05 yz450f fit a '00 yz426f? I see a lot of clutches available on e bay for '03-'05 450s. I looked at the Relkuse site and I see different part #s. Also, do you need the perch adjuster to make the system work? Any help would be appriciated.