2009 Yamaha YZ250F
What a machine! It goes like crazy. I wanted the 250f because I needed a 4-stroke but didn't want the 450 or anything excessive. Never the less, this one has so much power and it's there right from the get go. Just a tiny twist on the accelerator and you're flying.
Only mod so far is a kick stand and lucky number(that will give some extra Bhp's I reckon).
Anyway...just thought I'd share.