Join Date: Feb 2016
Location: Central Kentucky
The 55 series rear tire will make a noiticeable improvement in the way the bike turns into a corner. Handling will become more neutral and you will not have to use as much pressure at the bars to hold a line through a turn. There is absolutely no negative to switching to the 19/55 rear. Why they still sell this bike with the 50 rear is beyond me.
There is a speed sensor at the front sprocket and I believe the information is fed into the ECU. If my understanding is correct, changing the front sprocket modifies the rpm's read by the sensor and can cause a code. I have a 2013 so we should probably let those with 2017 and newer bikes chime in on the sprocket change for a more definitive answer.
2013 Ninja 1000.....Osram Nightbreakers, Pazzo levers, Vesrah pads, Puig screen, R&G frame sliders / case covers / axle protector, Sargent seat, PC5 with Ivans fuel map and ECU reflash, Akrapovic full exhaust, forks and shock rebuilt by Traxxion Dynamics.
2019 Yamaha Tracer 900 GT