I am the proud owner of a new (to me) 07 WR450f. I just upgraded from a '98 400f. The difference is amazing. 10 years of development amount to a ride that is so much more composed and power that is usable and forgiving. It has made monster power slides, stand-up wheelies and haulin ass, so much easier. I feel like i can ride much faster with less input. My point, to anyone wondering if there much to gain by upgrading one WR for another, do it. For someone that regularly tries to climb nasty hills the electric start is GOLD.