1000
A CRF 230 will top out at between 65 and 75 mph.
45+
Depends on the model. CRF 80f will go about 40 mph, a CRF 100f will go 50-55 mph, a CRF 150F will go 60-70 mph, a CRF 250 will completley depend on the terrain and rider but the top speed is about 70 or more
Stock, a CRF 150F will do around 60 mph while a CRF 150R will probably go a bit past 70 mph.
with new ones
maybe 35 to 40 mph
10w-40
40 miles an hour
It goes about 70-85 mph
CRF is just a label used by Honda in classifing the type of bike. for example Honda has lots of crf's. 50, 70, 80, 100, 150, 230, 250, 450.
.6 of a quart, same for the 50.