A lot depends on your year bike and what you may have done already. I have a 2012 with a lot of mods that may or may not contribute to my bikes overall smoothness. I have the ecuunleashed 2nd. gen flash, the Akrapovic muffler, 2014 clutch basket, Barnett pressure plate and springs, and a G2 throttle tamer. I ride 100% on the street. The Sport mode has always been abrupt on/off the throttle, even after the flash, clutch basket and exhaust mods.
Then I did the Barnett pressure plate and the G2 throttle tamer. These mods helped the most on my particular 2012 model for what you are talking about. They also are the least expensive mods out of the bunch. These 2 mods alone made the s mode useable, I have much more control at very slow speeds, fully loaded etc...I forget to switch to T mode now in situations where I always would have before.
When I did the new 2014 clutch basket, I saw the diaphram style clutch spring in there, which is the type in my Harley..... and which I do NOT like for several reasons, but I'm still living with an "improved" version in that bike. So later on I went to this forum and found out about the Barnett and decided to go in there again and swap out the stock set up. Although my experience is limited, a multi spring pressure plate is the only type of set up I've ever seen and worked on inside any of the Japanese bikes I've owned.... untill the S10. I'm not sure why Yamaha went with the diaphram type single spring, (and I'm far from and expert mechanic), but I know it's inadequate on my Harley, and now know the Barnett works better on my S10.
I ordered the Barnett pressure plate and spring kit from Rideon ADV, a good vender on this forum. The Barnett set up smoothes out the engagement quite a bit, giving you really fine linear control and feel for what the clutch is doing. You would probably like the improvement if you feel the stock clutch is touchy. The Akrapovic and especially the ECU flash are great mods in my opinion, and they may also contribute to the overall smoothness of my bike. For your specific complaints though, plus not knowing what year you have, or if you need or even want a re-flash, the G2 and Barnett could probably help the most, in my experience. They made me happier with
MY bike. There are new and different ECU flashes out there now too, so one of them alone may also help resolve this paticular issue better than the ECuunleashed did, but I don't know anything about them.
Power output aside, when I put this bike in the T mode, I feel it may NOW be one of the easiest bikes I've ever owned to control and ride smoothly in any tight or slow situation. Even smoother than all the Hondas I've owned or ridden, which to me, is saying a lot.
(I've considered Hondas to be the kings of smooth easy riding bikes over the years, just an observation). My "T" mode is more like "Z" mode now, so easy to ride I feel like I could get some ZZZ's.
