You need a tether kill switch and there is a maximum rear end width. I camt remember exactly what the width is so i wont post a number, someonr more knowledgable will chime in. You also need to have ball ends on your clutch and front break lever (unbroken levers). All of this stuff is checked at tech and they wont let you race if you dont pass.
A shorter swingarm is better for tt but you wont notice unless you're near pro level ability.
And a well built 200x is a very capable racer despite what some people think. Bring it out and have some fun. Last year there was a NE EDT race there the weekend of Trikefest, if you dont go to tf you can go get some seat time