i need a yz 450. i am split between an 03 and an 04. i was told the 04 is 4 pounds lighter than the 03, what is the actual difference in wieght? the only other reason i would want an 04 is the larger set of forks. are they that much better, as far as bottoming goes? any differences in the engine? i want the lightest bike i can get, but an 05 or 06 isnt an option. i am leaning toward an 04, can anyone with an 03/04 tell me which is best?