A stock Honda crf450r will hit about 90-95 mph.But it all depends on the weight of the rider and what your tooth ratio is on your sprocket's? If you have a small sprocket on the front and a big sprocket on the back you are going to get more top end speed than acceleration .if it is the opposite way around you are going to get more acceleration but less top end speed.
101mph
85
87 MPH stock.
not very fast , about 20 mph+
stock they will go about 45-50miles an hour stock
With stock gearing 68 mph.
With stock gearing 63 mph
70 to 80mph.
54 to 58mph (in stock)
A stock Honda Rincon 650 will go around 67 mph.
around 70-80 full stock
With stock gearing around 63 mph