alright, so i bought a 2003 yz450f. got it home, and started it up to see how bad the valves would need done. i went out a bit later after that, and i was kicking and the kicker shaft broke in half. so i was doing research and found that to 03-05 were the same. but then i found an 06 kick shaft that said would fit an 04. does this mean it would fit the 03 cause the 03 and 04 are the same bike?