I have also jumped off an 07 wr250 to a 15 wr250f . Only have 100ks on the clock so far ,reading the specs its a bit lighter but on the trail , so much lighter ,could not tell the difference between full or empty fuel tank with it back almost under the seat. Range with 7.5 liters yet to find that out. Power wise its just more everywhere, the best is the throttle control , its so precise and responsive , something I have to get used to. The yz250fx has more power ,but its the same engine with the yz muffler and different fuel and ignition maps. Something to look forward too. Finding the suspension is too firm ,I weigh 73kg so thats next to do, no not get fatter , adjusting spring rates. Gearbox with 6 speeds , closer ratios than the 07 with top gear a bit taller, excellent. Comes with the same spares kit, manual , small tail light, different wiring, braided front brake line and intake , exhaust parts to replace ADR bits. Cant wait for my next ride.
Cheers Lynton .
p.s. as Al Mason said BUY ONE.