 The upgrade was limited to 50 units.The F4 engine was originally designed to meet the then limit of 750 cc of the Superbike World Championship, although an experimental 898 cc version was produced in 1998.With the sports bike market moving towards 1,000 cc machines, the "motore grosso" (big engine) project was revived by MV's head of engine development, "Andrea Goggi", in 2001.