Ok, so here are my impressions of Ivan's Flash after a good riding day...
I haven't been on my bike in a couple of weeks, so when I installed the ECU I was wondering how much of a difference I would notice. But it didn't take long to find out.
1) I started the bike and noticed that it didn't change RPM as it was warming up. Normally it would start higher, then drop, then come back up as the ECU tried to sniff the air and figure out an ideal RPM. This time, it just settled immediately into a steady low beat and stayed there.
2) The bike sounded a bit... mellower. I think it was because it was running more evenly, even before I even got onto it.
3) Even without giving it gas, as I headed out of my parking garage, I noticed it pulled stronger at low idle. As I started on the the street in first gear, it seemed noticeably smoother.
4) Once I got rolling, the torque curve felt much more immediate. There was no stutter or lag, just an even smooth roll on of the throttle.
5) On the highway, it pulled strong right off the throttle crack. No stutter or slight lag as before. It was great!
6) Zero backfire or popping. I didn't mind that before, but now it is completely gone.
7) I used to have to fiddle between 2nd and 3rd in the city a LOT. This ride I could stay in 3rd at low and higher rpm, less shifting. It was really nice to be able to ride it without constantly clutching.
8) A new sound when I crack the throttle from low rpm... like a ping or a click, a sound of metal with a couple of noticeable 'ting' sounds. I don't know if that is a valve thing, or the throttle bodies or something? Anyone know?
And this... it somehow feels much easier to downshift. The gears just mesh nice while slowing the bike and much less of a jerky feel. Very sweet.
Maybe there is also a little less engine retardation effect when slowing down? But not really much that I've noticed.
Overall, it is quite a change. Feels like some of the sport bikes I have ridden - smooth, linear and more of a settled ride, with a quicker throttle response.
I must say I am impressed!
Question: When I put the ECU back in, I thought the rubber boot stretched *over the end of the ECU. But it wouldn't go. Does that rubber boot just rest on top of the ECU, or does it actually stretch over it? I just left it resting on top of the device for now, but don't want any water or anything in there... anyone know?