2.3 Engines
a. Engine Displacements
749cc - 1000cc 4-stroke four cylinders
901cc - 1200cc 4-stroke 2 cylinders (901cc - 1000cc 4-stroke 2 cylinders will continue with the 2008 rules through 2009 and then allowed to compete only after complying with the 2009 rules)
b. Engine type, configuration, stroke and any modifications of engine components to alter the stock OEM
firing order of the cylinders are not permitted.
c. The displacement capacity must remain at the homologated size. Modifying the bore and stroke to
reach class limits is not allowed.
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