Peter Baker wrote: I think rain is pretty clear, max power is lower + ramp up is slower...
My understanding of Road vs. Dynamic is the power/torque curve to RPM is the same, however the ramp up in Dynamic is steeper meaning you effectively get more throttle at the engine for the same amount of twist on the handle bar... Personally I am always in Dynamic practising good use of my right hand control!
Hey Peter, finally a post relevant to my original question! I'm just trying to understand from a technical point of view what is the effect of changing the riding mode on the response of the engine ECU. I'm a design engineer, call it professional curiosity if you wish.
From your post I deduct that the rain mode changes the ECU fuel map to a lower output map, which the manual calls "restrained". I guess that this makes it also some sort of "economy" mode as restricted output is normally achieved using leaner air-to-fuel ratio.
Both road and dynamic modes use the maximum output fuel map, but the dynamic mode uses a quicker ratio between throttle grip position and throttle valves opening. For anybody that has ever used an adjustable quick action throttle on a cable system, this is the equivalent to using a larger disc at the handle bar, ie the throttle valves open more for the same amount of grip twist.