I have a 2011 450 with a Rekluse clutch and the heavier GYTR flywheel. I have not altered the mapping and primarily run pump fuel while on occasion I will run some VP U4.4 through it. Also I have run both my stock pipe and a Yosh full sytem. My issue is that my bike occasionly will backfire slightly and stall in a slow corner where the clutch is engaged whether I let the Rekluse do it's thing or I pull it in manually. It has done this with all the combinations of pipes and fuel I mentioned so I don't believe any of that to be the culprit.Also it will be very difficult to start when it it is warm sometimes but not consistently. One of the reasons I put the Rekluse in it was that I seemed to be stalling the thing way to easily in slow corners and I absolutely love the clutch but obviously I have a underlying problem. Does anyone have guidance on whether maybe I need to alter my mapping or maybe I have some other issue related to fuel delivery?