I own I 2006 Honda 599, about 3300 miles on it, and have recently had some problems with it stalling. It will stall out when I´m trying to down shift. The only way I can prevent it from stalling is to let the RPMS get down to about 2000 before I down shift and slowly ease the clutch in, downshifting in a more normal fashion will cause it to stall. I recently installed a Two Brother´s VALE slip on exhaust, but did not get a Jet Kit along with it, could this be the reason my bike is stalling out? I´m pretty sure this problem started actually the day before I put the exhaust on, which would lead me to believe the problem is not being caused by the exhaust, but everyone I talked to seems to think I need to Jet my carbs to accomodate the new exhaust. Any advice?