need help bloody rgv

[cleallo]

ive bought an 90 vj22 rgv for a track bike because im to scared that ill through the busa down the track i was pushing it last time .ive changed spark plugs cleaned out hole fuel system cleaned reed valves checked for air leaks . new fluids right through out including petrol . it starts first kick you can rev it but get on it no power it will take u up the road but no power please help