So, after a 20 or so mile ride, here is my initial feedback. In one word....smooth. Low speed parking maneuvers and pulling out off the line, I see considerable smoothness. No more jerky throttle action. The 2 reasons I chose to buy Ivan's flash was to be able to use my cruise control in any gear at any speed and to tame down the throttle jerkiness. I have a 2013 and the cruise control was capped at 80mph. I figure the ECU flash is worth about $529 to me so at $350 it was a good deal.
Upon starting the bike up initially, I noticed a higher RPM idle which warmed up to a nice smooth idle. Smooth is the key word here. Once on the road I experimented with the touring and sport modes along with Ivan's 3rd mode indicated by a blank space where the T and S are normally shown on the dash. Now obviously I have to ride much more in these modes to give a full review. My initial butt dyno tells me the throttle response is smooth in all 3 modes. Ivan told me he doesn't change the fuel mapping in the touring or sport modes. They are just smoother due to the elimination of the throttle cut, etc.
The touring mode is just like I remember it with added smoothness and the same with the sport mode. Ivan's mode felt very similar to the sport mode, both smooth and responsive. I would have to ride more in both modes to give a more informative review. After spending considerable time in Ivan's mode, I don't really feel the need to be in any other mode. Ivan explained that he's able to cut out the throttle delays and make the bike feel like you're riding a Gen 1 or 2 with a throttle cable. Honestly, the throttle response of the bike felt very similar to my Gen 2 with added smoothness during slow speed maneuvers and pulling out from a stop.
I revved the bike up in 3rd gear before entering a series of tighter turns. When releasing the throttle before laying over into the first turn, the transition was smooth (surprisingly). I felt the normal engine braking going into the turn, but no jerkiness letting off the throttle. I read somewhere that a rider felt there was no engine braking or at least reduced engine braking after receiving Ivan's flash. That's not my experience at all. Before the flash, when letting go of the throttle in 3rd coming into a turn, I felt more jerkiness when getting on and off the throttle. Now its, (you guessed it), smoother. I revved high in 3rd gear and let off the throttle and back on etc. multiple times. The bike jumps and dives like it always did, but more controlled.....shall we say.....smoother.
I also noticed the radiator fan coming on a little earlier as I pulled into my garage. That can't be a bad thing either. I also read where some riders are saying they are experiencing better or worse fuel economy. I can't see where there would be much difference either way as most of the poor fuel economy comes from how you twist the throttle. I'm sure you could baby the bike and get great gas mileage with or without Ivan's flash. Fuel economy is not the reason to get Ivan's flash in the first place. It's easy to get much better fuel economy. Buy a lighter bike with a smaller engine. So simple.
Here's a link to Ivan's ECU flash for the Gen 3s. He also has a flash for the Gen 1s and Gen 2s.
https://www.ivansperformanceproducts.com/fjr1300.htm