I'm getting a new bike but I can't decide between a Honda crf250r and Yamaha 250 yz?

I'm getting a new bike but I can't decide between a Honda crf250r and Yamaha 250 yz?

In my opinion go for Honda 250.

Hi so the yamaha is a two stroke and the Honda is a sports four stroke the main difference for a rider comes in when braking the four stroke has engine braking which has to be a bonus when doing some slower movements over logs and in tight corners slowly.
the two stroke may slightly quicker away as it beats twice as fast.
so it comes down to personal choice of what you want actually.
off road trails would be best with a four stroke. Fast get away and speed around a scrambles circuit a two stroke engine might just be a bit faster.

Either one should make you happy.
I ride/race Yamaha, have since 1974, have a YZ 450F and quite happy.

The YZ is a 2 stroke, while the CRF is a 4 stroke.

The 4 stroke will have near instant power, all the way through the rev range. The YZ will only have good power up at high RPM's; its power-band. The Honda will require less maintenance, and benefit from improved reliability. The Yamaha will provide more fun (In my opinion) but will require more maintenance, and the engine won't last as long (It will need re-building earlier than the CRF's). I'd always choose a 2 stroke of the same CC, as I find them more fun. However, the 4 stroke has a few more benefits and are more generally user friendly as the power is more predictable. What ever you choose, both are good options.

None, you said your 17 so it's a 125cc for you on completion of your CBT.

Your mum if failing making her son worthy

You would have to be on private ground with no public to be able to drive off road. If you go on any public area then your breaking the law.