Its not a twin cylinder machine LIGHTWEIGHT TWINS SUPERBIKE EXPERT & NOVICE and LIGHTWEIGHT TWINS SUPERSTOCK EXPERT & NOVICE Up to 800cc air-cooled twins Up to 750cc water-cooled twins with 3 valves Up to 700cc water-cooled twins with more than 3 valves Unlimited singles based on Formula rules (Superbike only) -No 125cc GP machines, *Buell Firebolt and Lightning, Ducati 900SS and any model using the 1000DS engine, are allowed under Superstock rules (with slicks) in LWTSB only. *There are no bodywork limits in LWT.
Yeah there was a rumor that the 400 was going to be legal in clubman but it was incorrect. I had the check it out for myself, not legal...