130.418 mph Set by Cardboard Robot on Sep 6 2008 on a KX500.
at the salt flats.
132.314 mph
40mph with top of the line parts which is going to cost around $2,000 to go as fast as possible.
fast enough
about 60mph
about 40mph
210
it all dipends on the bike
A 70cc dirt bike will achieve a top speed of around 40mph
not very fast
55 to 60 its fast
how fast does 250cc Orion dirt bike go
90 mph