i got a 2002 zx50 2t. i basically need the whole back side. anyone has these? also my zx50 has a tough time pulling me up hill (i weigh around 240lbs) i can reach about 52mph but once i hit a pretty big hill, it brings me down to like 25-30mph i got kevliar belt, performance pipe, destricted cdi, racing varirator with 6.5g. i think my torque spring is 1000rpm and i have stock clutch springs. do you guys think if i get a stiffer torque spring (like 1500prm) and stiffer clutch springs, ill be able to get up the hills better? help out a newbie here?! thanks