150f is the trail bike where 150r is the motorcross. Trail bike is a good solid bike, as long as you use it for what it's intended, trails. I'm sure it can do some motorocross stuff. If your looking to get into motorcross though, the 150r is better suited.
there is no such thing as a crf100r. theres a xr100r. and a crf150f.
230,250,or if you can handle it a 450.It depends on his/her height but I would recommend a CRF150R (that's if he/she is a good rider), CRF150F (Beginners) and a YZ 125 (intermediate).
i meant a 2008 crf150r fit a crf150f?
As far as I know you can only do this for the 250 models. However, there is a FMF Powercore muffler available for the CRF150F that is equally good or even better.
The yz would always win because its a 2 stroke race bike. Even the yz85 would beat the crf150r or the crf150f.
The top end speed of a CRF150F is 60-65
The CRF150F is a trail bike, soft suspension, not as much power as the r, air cooled engine. The CR150R is the motorcross version, more power (21 hp), water cooled, taller suspension, less low end power, you have to keep it at high rpm's to get all the power. They are quite different.
about 63 mph
yes
its 147 ccs
Buy a used 250, like a Honda XR or a Yamaha TTR. You are too tall for a midsize bike, like a CRF150F, and that's the only reason I am recommending a 250.
about 50-55mph