my bike is in pieces so my buddy asks if i want to work on his 2010 yz290f and ride it, jetting is of from the big bore kit, and it keeps stalling with a rekluse clutch, what a POS get the jetting sorted and it still stalls, change to the stiffest, highest engagement rpm spring and take a few bearings out of the rekluse, still stalls
so i swap a real clutch in, and WOW i love this bike, light feeling and strong bottom end, but its still controllable, its gotta be one of the fastest, easy to ride trail bikes, guaranteed if i raced this it would make me competive in the next class up.....
but i ride for fun so im sticking with the 2 stroke
definatly a good bike if you are after points.....
the 450 will have less power and will be harder to start, and will be heavier, but to make up for it it will require more maintenance.
4stroke=dead fish