seval

My cbr 600 f3 1997 want go more than 80 km/h in 3,4,5,6 hear, in first gear it goes to red line and about 130 km/h in second it goes about 90-100 km/h and it starts sputtling, in 3,4,5,6 gear it stays at 6k rpm and it want go more than 6k rpm, i let the gravity feed to carburators with full tank but the problem is the same so its not fuel pump problem, please help what is problem with my bike, any similar experiences???