... increase in vibration, ...
... slugging acceleration when using small throttle openings ...
These are symptoms I've had with my bike from the first day of ownership. My dealer recommended a TB sync to Kawasaki within the first couple of months, but they would not authorize it. Now, after 21,000 miles, it's no better.
Thanks for providing this information, as it reinforces my hope that a TB sync will make my bike better. It's just the damn annoyance of buying a new bike so I would not have to work on it, only to be put into this scenario that frustrates me so.
I have not bought a gauge set yet, and at this point, I don't trust *any* dealer to do it right. As soon as I find the time to do some shopping, I'll have a TB sync gauge set, and I'll tackle this job (during the upcoming wet season). If anyone has recommendations on their favorite gauge set and why you like it, please feel free to let me know.