They can be geared to run 100 mph but a stock 450 shoud be 90 to mid 90's.
The top Speed of a Stock YFZ450 can be 92-93mph but if modified it can go up to
115 mph.
71mph stock and 75 straight piped
Yamaha never made a tt-r 450.
25-28 mph
140 mph
80-88
fast
if it is a Yamaha wolverine 450 it will go 61mph
a Yamaha blaster can go around 75-80
155mph
Not that fast but about 50 with no upgrades
the Yamaha ttr125 goes about 50 to 55 mph
about 70mph
2099
70mph
700mph
About 75 mph
75-80mph