10w30 is a good choice year round. I highly recommend you use synthetic oil in this air cooled engine.
5wt oil. Use Honda oil.
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.
Yes, it does.
a crf 100 go up to 35 mph.
yes it is and it has 5 gears
The Honda crf,xr 100 (any year), because of the bikes light weight, surprising power, and it virtually unoutgrowable size.
about 12 to 16
65
900-1300
yes
45 to 50 depending on your weight
All of honda's trail bikes used to be called XR's and their motocross bikes were CR/CRF now all of their trail bikes are CRF and their motocross bikes are CRF-R