Whats up guys? So I finally got my kz440 back together and took it for a spin around the block. Idles great and great throttle response. Low end is great and really great torque. When I gun it mid throttle it doesnt want to go...starts popping/back firing. Stock airbox and exhaust. Im thinking maybe timing? Maybe needs fresh plugs and caps? I dont see any adjustments on the carbs themselves. Just an idle adjustment. Carbs have been cleaned and one new diaphragm replaced because it was torn. Any thoughts? Thanks y'all!