px engine probs

[gnick]

need some help, my 2 year old px has developed a problem when i am flat out it starts to splutter as if it is not getting enough petrol.
I cleaned jets and air filter with carb cleaner and still has same problem.
Any help appreciated

[ianmartin40]

Did you make sure the float and needle valve were not sticking and move up and down freely? incase it is not delivering enough fuel, also worth taking fuel pipe off carb and open petrol tap to make sure fuel flow from tank is good.
hopefully something simple