The following are the default displacements (and maximum displacements) for the Runabout Classes: All Runabouts shall have an overall displacement no greater than 2000cc. If the displacement exceeds 1600cc then the maximum displacement shall be the OEM displacement of that model plus the additional volume created by a single overbore of each cylinder. The IJSBA shall publish the displacements once calculated. According to IJSBA the new Rule book will be released in first of Feb.
