Ducati M750 Monster Dark: “Budget” version. Matt black, no seat cowl and a little bit cheaper. Introduced in 1999, discontinued 2001 when an “ie” Dark was launched, along with the Ducati M750ie Monster (both were discontinued the following year).
Ducati M750ie Monster: Essentially the same as the standard bike but with fuel injection. Introduced 2001, discontinued 2002.
Ducati M800 Monster : The 803cc version, launched in 2002 with six gears, 73bhp, a lighter clutch and more ground clearance. Discontinued at the end of 2003 when it morphed in to the Monster S2R.
Ducati M800S Monster: “Special” version of the new model with alloy swingarm, bikini fairing and carbon fibre body parts. Discontinued in 2005.