WorldSBK star blames Bautista slump on Ducati rev-limit change The slump in form that has led to Alvaro Bautista to slip 81 points adrift of Jonathan Rea in the World Superbike Championship can be traced to the moment regulators decided to restrict revs on the Ducati Panigale V4 R, according to 11-time race winner Ruben Xaus.