I am running an aftermarket fuel pump and lower carb isn´t getting enough fuel is backfiring and blowing flame out the tailpipe. The fuel pump that I am running has sufficient pressure perspex of the bike. After it runs for a little bit and warms up it will idle but will not supply enough fuel to actually drive the bike. I don´t know if the lower carb is clogged up or not getting the fuel where to coils not firing right now I´m not for sure if anybody can help that would be great.