I've recently purchased a 2013 Thunderbird Storm, and fitted some Triumph aftermarket short pipes. These were supplied & fitted by the dealer, along with the necessary engine mapping. The problem I having is in relation to throttle respone. When I blip the throttle to change down gears, I find that the engine does not respond in accordance to the throttle input, thus lagging. Sometimes too, I get a backfire through the airbox. This is a lot more apparent when the rpms are down low. Also, when exiting a slow corner, I notice a stutter in response when I apply the throttle. To me, it feels like a coil/spark misfire. Has anyone else experienced a similar problem? Look forward to your response. Cheers!!