Some questions about dirtbikes and trikes

[Velislide]

Just wondering, what the top speed of, lets say, a Honda 125 dirtbike is? and a Honda CR250. Just with minor upgrades, like high compression piston, ect. And does anyone know what the topspeed of a 250r is? With like the same type of mods. :?

[plumber]

an air cooled R(stock or close to) between 60-70. there are so many variables like the 85-86Rs come stock with a smaller rear spocket so the top end is better & one more gear than the older air cooled trikes. when your talking speed its the rider that determines how fast a machine will go.