cbr250rr mc22 stumbles in upper gears

Hello everyone! I got a CBR250RR MC22. I have a problem when im running on the road, the problem is the next: first gear, second gear and third gear the bike runs very well and touch the 19.000rpm. But when i put the four gear the bike start lose power, in the five gear the bike dont want pass the 14.000rpm and in the six gear it dont want pass the 12.000rpm. In conclusion the max speed is 120km/h, somebody has got the same problem? Im going without the fairings for dont scratch it.