If you have a current (overseas) licence than you should be able to 'transfer' it ..
The 250cc learner limit has been modified somewhat .. highter powered 250cc bikes have been excluded .. but lower powered upto 650? cc bikes have been included .. I don't think teh xr is a lower powered one though .. could be wrong.
Regards Frank Warner
motorcycles BMW R80 G/S 1981, BMW K11LT 1993, BMW K75 G/S