Baotian BT49QT-9 running problems

[C_peto]

I have recently purchased this bike and it was running fine but now it has developed a problem where it will not full throttle without choking and then dying. If i let off the throttle and then gently re-apply i can keep it running but it just will not go above half throttle. The bike idles ok a revs ok in low range. I have fitted a new carb, plug, checked the valves and changed oil but the problem still remains. Could this possibly be a problem with the fuel valve on the bottom of the tank?
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C.peto

[yen_powell]

Baotians are famous for doing this sort of thing .

Did you make the name up?

Anyway, sounds like you make have a blocked or kinked fuel line. Fine until you ask the bike to speed up.
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Blackmail is a nasty word........but not as nasty as phlegm!
XT1200Z and a DR350 in bits

[Az]

Replace/clean the air filter, see if it makes a difference and report back.