Replaced the gasfilter and put on a new Carb. Still had the bogging down at 1/2 throttle and backfires. Still has the same issue and after more research looked to be a bad cam. So we replaced the cam and rocker. Now when we start it, it doenst seem to backfire but wants to cut out at 1/4 to 1/2 throttle. It's almost like nothing changed but the cam did look bad but it's not backfiring now. But can't even get to 1/2 throttle now and just cuts out. Any suggestions??