wr 400 popping

hi all need some help m8 got wr 400 bike starts great goes great untill it warms up then it pops like crazy and no power had valves checked all in spec any idea.s shop cant fiqure out prodlem so so posted here 2 see if any body can help with this prodlem only mod done 2 bike is a fmf q pipe :banghead:

To help the others who are experts at diagnosing these types of things, please post any mods you've had done to the bike, your temperature and elevation about sea level, current carb jetting and needle clip settings.

From what others have posted here, perhaps your jetting needs to be adjusted?? We'll see when the experts post here!

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