I noticed today that the throttle ramps up fairly smoothly (moderate jerk from zero to moving, then smooth the rest of the way) but does not ramp down at all as you back off the throttle until it's totally closed then it goes from previous peak power to zero. Makes it a bit rich negotiating tight turns. Anyone know what causes this and how to fix? Also is it normal to be jerky right off the bottom? Note this is a bone stock, 6 day old 2015 12.5 Eco.