intresting . a mates got a lot of bits and pieces laying around so new project..they have put a yam xs650 motor in a cbr 250 frame ,both approx. 50 hp so frame should handle it but they weighed every thing before hand and reckoned they saved about 40 kgs over original xs650 frame etc ,that's as far as they got so far but talking about different swing arm and forks as well ,will be going on a drag strip ,so do we call it a 250 or a 650
