does anyone know if a 04 rear swing and arm will fit a 03 as my 03 seems to break a lot and had many welds im hoping that the 04 swing and arm will fit with a different spring but same shock as the spring looks different on the new one also i would like to upgrade my gear box to 04 does any one know if you need to change crank cases

 

gears will fit.. the swing arm is 5/8 of an inch shorter in the 04 models... other than that i think it should... i aint sure about the shock spring tho.
let us know what you find out.