zxr250 losing top end power

[nzpoontang]

Hey. A while back my zxr250 was stalling a lot and would cut out on open road like it was running out of gas, turned out to be a split vacuum hose that operated the fuel tap, so fixed that and has been running mint as, pulls hard to 180kmh, BUT as of last week, it has seemed to loose all its top end power, pulls well in 1st,2nd,3rd then as you come up on 130 kmh it just stops pulling, I thought clutch originally but it seems to just struggle to rev over 12-13 rpm in the higher gears now, any advice of where to start?? cheers

[Vinz0r]

You should know that with carbs it could be a multitude of different things, and that you need to narrow it down. You'd be much better off finding a specific forum dedicated to the type of bike and asking on there. There are probably hundreds of threads on those forums asking exactly the same question, with a list of diagnostic steps for you to complete to narrow down the problem.