Among the regulation changes announced by the World Superbike Championship on Thursday is a winter testing ban and weight-limit change for 1200cc twin-cylinders.
The new testing ban will run (like MotoGP) from December 1 until January 15, while the twin-cylinder minimum weight has been increased from 165kg to 171kg.
There was no mention of whether the twins will continue to require intake air restrictors although, "The procedure for the application of handicaps to 1200cc 2 Cylinder motorcycles has been modified."
1000cc 3 or 4-cylinder bikes will remain at a minimum weight of 165kg. Ducati, which won the 2011 title with Carlos Checa, is the only manufacturer presently racing a twin-cylinder.
Other rule amendments include confirmation that WSBK will join the Supersport and Superstock classes in allowing only one bike per rider, while the Supersport and Superstock riders will be limited to eight and three engines per season respectively.