Yamaha didn't start producing the "WR250R" until 2008. They did however produce the WR250. So I guess the answer to your question would be zero.
fast
Yamaha sniper
fast enough to kill you
if it is a Yamaha wolverine 450 it will go 61mph
a Yamaha blaster can go around 75-80
no warriors are twice as fast
188MPH
The 2009 Yamaha Blaster doesn't exist. Yamaha discontinued the blaster in 2007
Not that fast but about 50 with no upgrades
the Yamaha ttr125 goes about 50 to 55 mph
very slow