This was posted on the Colorado Karter last year regarding TaG USA rules on the carb and airbox. I think Doug Welch originally posted it:
“The pdf for the Rotax does state the #40 slide. However, section 2.2.?? on carbs states that the slide is part of jetting and that jetting is open. TagUSA rules state specifically that the slide is part of jetting, jetting is open but that the slide assembly must be OEM (Dell’orto).
I’ve specifically talked with Marty Casey, national tech director for TagUSA, on this issue. He tells me that section 2.2.?? overrides the pdf sheet from Rotax. As long as we run the standard Dell’orto VHSB, we can change all the internals we want with standard Dell’orto parts.
The same issue on rads and airboxes. The pdf talks about the standard rad and airbox, however, the body of the TaGUSA rules let us run any rad or airbox we want. Again, the writen rules overrides the pdf from Rotax. “
Charles