So excited for riding season!!! I just picked up a nice 08 YZ450 in great condition. It looks like it only needs a little TLC and small parts. My last bike was an 89 CR 250 2 stroke...so this should be quite the difference. Anyone suggest the "must" upgrades? The bike laready has a slip-on. Ill be changing the air filter, oil, plugs, tires, chain and sprokets.