i have a 2002 xc600 motor that i'm putting in a 2003 440 chassis. should i use the xc600 wiring harness or just keep the current 440 one in there? also, i'm looking at a set of 2001 pro-x 600 carbs. will those carbs work fine with the 2002 xc600 motor? thanks for all the help.

use the 600 one, way easier and will be more reliable...01 carbs should work, however a few specs w/in them may need to be changed. Since you got a xc motor your going to need a full pro-x exhaust, y-pipe to can. I think i got an oil pump from mine if you need one...