This is a cool thread...
This spring On my 09 YZ450:
-All new plastics (went from the stock white to the Acerbis Yamaha blue).
-GPR stabilizer (love it)
-Fasstco Flex Bars (love them)
-new tires front and rear (Dunlop MX51's. People think I'm crazy, but I love these tires in the desert.)
-Warp9 front rim (I came home with a MASSIVE bulge from the rhino rally...I have no idea how the tube didn't pinch flat).
-new top end: piston, rings, valves, valve springs, cam chain, gaskets.
-for the first time my rekluse exp 2.0 feels like it needs to be adjusted (I haven't touched it since the post break in adjustment). The free play gain in the lever isn't what it should be, and I stalled my bike for the first time since putting it in a year ago. So I will be messing with that here shortly.