not shure what size. i like power but not stuff thats gonna kill me, rode my 2nd 4 stroke dirtbike and it was a 1984 yamaha TT600 about 45-50hp but managable, to big to ride for me weight wise, 350lbs and to start..no deconpression! it was like kicking a cr or kx500 for me. i have a few bikes in mind, money is comming together nicely and i prefere an older machine vs new beause i dont wanna mess somthing that cost 5-6K up. i have seen prices as low a 1800 for these 1st years 400F's and 250F's i grew up watching the 4 stroke reloution happen and studied these bikes alot in dirtrider mags. i'd like to konw how relable they are, how long top ends last when not racing, prolly not even pushing the bike more then half of it power. weight is not an issue for me, i ride 400+lbs sportbikes so even a heavy dirtbike feels light to me. are most of a YZ400F's and 250F's good off road bike thru woods and nasty trails. i chose not to go WR because who on earth needs lights and more 20lbs of stuff, like where can u ride off road at nite these, days...just want to know riders feed back for these 2 bikes, i am also looking at a TT-R250 XR400 and XR250 but want somthing with some nice up to date things.