Blocked Walbro WT-603A carby... Help?

Hello. i just got my walbro carb tuned at movement systems in perth the other day. Current set up. Pbu headstraong headkit, Ada Complete v-wedge fiberglass reed cage, Ada race pipe, adjustable clutch timing key ligtened flywheel. I am still running in my bike still on first tank till today my bike wouldnt start, My carby is blocked. When i used to prime it with the bubble after a while fuel used to come out where the air filter goes... normal. Then today i tryed priming it and no fuel comes out. Not one drop is going into my engine. I got the airline at work and blew some air into the top fuel hose gentaly. after that i primed it and fuel came out started fine. i just got home befor and tryed starting it again and it didnt start. I took the air filter off and no fuel was coming out the carb. Ive taken apart my carby and looked for the obvious, cleaned it with some throttle boby/carb cleaner. Put it all pack together and still blocked. Could it be a blocked jet? Sorry for this being so long but some one plese help much app. Thanks

do u have a steady fuel flow from the petcock? if u do it'll probably be a blocked needle and seat or main jet what ever u do dont go blowing air down into the carby you could be moving the crap along the lines more pull it fully apart than blow the air through everything

Sorry wats a petcock, is that the valve thing to shut off fuel?

yes its the on/off tap

no there is no petcock on the walbro wt603 a, where abouts are the jets? Thanks

Make sure the return line is fed to fuel. I have the same carb and it wouldent start untill i put the return to the tank. You can even put a splitter in your fuel line as close to the tank as you can. They say you should use the ada ful line kit, but i didnt want to drill into my tank. Also try shooting some fuel into the carby yourself just to make sure it isnt your fuel line.