A 650 is not a 300. Totally different engines. Different cam timing, different redline, different use cases, pretty much different everything. I don't have a lot of seat time on the 300 right now, but I feel like the stock gearing and program is well suited for a commuter bike, which is what I use it for. Obviously if you use it for other things, you might not be satisfied, you might want more high end power, or smoother low end power, or something like that. But it's still a 300, and already at a fairly high state of tune due to its Ninja heritage.
2018 Versys-X 300 ABS. Former bikes: 1983 Honda FT500 Ascot, 1985 Honda XL-350, 2001 Kawasaki KLR-650, 2003 Kawasaki Concours, 2008 Suzuki V-Strom 650.