http://www.formulausa.com/form...ebook


ULTRA-LIGHTWEIGHT SUPERBIKE (Amateur & Expert Divisions)
Single cylinder, unlimited displacement, unlimited frame
Two stroke, liquid cooled, up to 315cc
Two stroke, air cooled, unlimited displacement
Twin cylinder, air cooled, non-desmodromic valves up to 900cc
Twin cylinder, air cooled, desmodromic valves, up to 805cc
Twin cylinder, liquid cooled, pre-1999 model year, up to 700cc
Three cylinder, non-fuel injected, up to 900cc
Four cylinder, liquid cooled, pre-1987 model year, up to 570cc
Four cylinder, liquid cooled, 1987 to 1992 model year, up to 500cc
Four cylinder, air cooled, up to 750cc
Harley-Davidson Sportsters of unlimited displacement

Intriguing to say the least (when you compare the bikes you'll be racing against in this class), plus the LW classes!