As an aside does the strom have a air injection system to burn off unburnt fuel.When the exhaust valve on my gen 2 fazer[yes I've had both gens ,to avoid confusion] was removed with change of end can it would pop on overrun.part of the valves job was to close on a shut throttle so you couldn't hear the pops.this was cured by blocking the air feed in the air box,sort of worked, then turning it off when ecu was reflashed,better but never completely stopped the pop.Do any of you who have removed/bypassed valve get any popping on overrun?