1996: Ducati ST2 launched in October.
1998: Revised rear suspension, longer gear lever.
1999: Ducati ST4 launched.
2000: Ducati ST2 and Ducati ST4 get grey frame and wheels, new clocks, improved side stand, braided steel brake lines.
2001: Suspension rebound adjustment removed from Ducati ST4.
2002: Ducati ST2 and Ducati ST4 get catalytic converter and aluminium clutch housing.
2003: Minor styling tweaks.
2003: Ducati ST2 and Ducati ST4 discontinued in September.
Ducati ST4S: similar to Ducati ST4 but with re-tuned 996cc engine and superior suspension.In production from 2002 to 2004.