I have the exact same bike. I'm a total noob, but this dude on the forum "Roytheroach" has a 2016 super 8 4T as well. Try searching his name, he has an entire thread on the restrictors. So far the ones I am aware of are the washer lodged in the intake valve from the carb, the main jet being too low, the CDI having an RPM limiter and speed limiter, and the variator bushing having a shoulder on it. I live in Boston and needless to say it's pretty hilly, I removed the washer and the torque is MUCH better