weird power

hi all my bike has been running sweet , but recently it seems to be boggy and hesatant on pull away to 15 mph then it flys through the midrange then splutters and bogs on top and starts to drop off speed , then if i roll the throttle off then back on its pretty much making no power and the speed starts to drop down to 30 mph where i splutter along the same thing happens if i hit even the slightest encline , if i pull over and stop moving then pull away it will start all over again, please help

 

have you tried the obvious thing's., plug, air filter, carb clean

 

yep multiple times , it has started this since i had to go back to standard reeds and reed block , it seems to have really upset it , will have to buy some new carbon reeds to replace my split ones, hopefully that will help sort things

 

yeah if it was running fine before, that may well be what's causing the problem then

 

I had the same problem with my aerox turns out the reed block gasket was shot so put a new one on and all is now good