Launched in 1989, the GSF250 and GSF400 are naked street motorcycles, with liquid-cooled, inline four cylinder engines derived from the GSX-R250 and GSX-R400 motorcycles, mounted as a stressed member in a steel trellis frame with single rear shock absorber.
 Apart from the engines and transmission, the "baby Bandits" share many of their parts.
 Limited editions have a retro-styled top fairing.
 'N' designated models have clip-on handlebars.
 "GSF" and "Bandit" nomenclature are both used across the series' chronology and market geography.

The first generation GSF250 (GJ74A) produces 45 bhp (34 kW), while the GSF400 (GK75A) produces 59 bhp (44 kW).
 The GSF400 manages the extra power with a 525 chain and double disk front brakes (single disk in North America), compared to a 520 chain and single front disk on the GSF250.

From 1991, the GSF400V received variable inlet timing via solenoid-controlled rocker arm engaging with supplementary cams.
 Although these models are commonly referred to as "GSF400V-V", the '-V' actually denotes the 1997 Suzuki model year motorcycles.
 VVT models are usually recognised by a red engine cover and some instances of a light grey engine cover.
 The GSF250V arrived later, in 1995.

In 1992, engine adjustments improved low-mid range torque trading off peak power reduced to 53 bhp (40 kW) for the GSF400 and 40 bhp (30 kW) for the GSF250.

In 1995, the second generation GSF250V (GJ77A) and GSF400(V) (GK7AA) introduced significant updates, including new styling, fuel tank, swingarm, air filter assembly, exhaust, seat, controls, console, etc.

GSF250 models
GSF250 - model years 'K' (1989), 'L' (1990), 'M' (1991), 'N' (1992), 'P' (1993), 'R' (1994).

GSF250V - model years 'S' (1995), 'Y' (2000).

GSF250Z - limited, model years 'M' (1991), 'N' (1992), 'P' (1993).

GSF250VZ - limited, model year 'S' (1995).

GSF400 models
GSF400 - model years 'K' (1989), 'L' (1990), 'M' (1991), 'N' (1992), 'P' (1993), 'R' (1994), 'S' (1995).

GSF400V - VC engine, model years 'M' (1991), 'N' (1992), 'P' (1993), 'R' (1994), 'S' (1995), 'V' (1997).

GSF400Z - limited, model years 'L' (1990, SUZUKI 70th Anniversary "LIMITED" edition), 'M' (1991).

GSF400VZ - VC engine, limited, model years 'M' (1991), 'N' (1992), 'P' (1993), 'V' (1997).
Launched in 1989, the GSF250 and GSF400 are naked street motorcycles, with liquid-cooled, inline four cylinder engines derived from the GSX-R250 and GSX-R400 motorcycles, mounted as a stressed member in a steel trellis frame with single rear shock absorber.  Apart from the engines and transmission, the "baby Bandits" share many of their parts.  Limited editions have a retro-styled top fairing.  'N' designated models have clip-on handlebars.  "GSF" and "Bandit" nomenclature are both used across the series' chronology and market geography.
The first generation GSF250 (GJ74A) produces 45 bhp (34 kW), while the GSF400 (GK75A) produces 59 bhp (44 kW).  The GSF400 manages the extra power with a 525 chain and double disk front brakes (single disk in North America), compared to a 520 chain and single front disk on the GSF250.
From 1991, the GSF400V received variable inlet timing via solenoid-controlled rocker arm engaging with supplementary cams.  Although these models are commonly referred to as "GSF400V-V", the '-V' actually denotes the 1997 Suzuki model year motorcycles.  VVT models are usually recognised by a red engine cover and some instances of a light grey engine cover.  The GSF250V arrived later, in 1995.
In 1992, engine adjustments improved low-mid range torque trading off peak power reduced to 53 bhp (40 kW) for the GSF400 and 40 bhp (30 kW) for the GSF250.
In 1995, the second generation GSF250V (GJ77A) and GSF400(V) (GK7AA) introduced significant updates, including new styling, fuel tank, swingarm, air filter assembly, exhaust, seat, controls, console, etc.
GSF250 models
GSF250 - model years 'K' (1989), 'L' (1990), 'M' (1991), 'N' (1992), 'P' (1993), 'R' (1994).
GSF250V - model years 'S' (1995), 'Y' (2000).
GSF250Z - limited, model years 'M' (1991), 'N' (1992), 'P' (1993).
GSF250VZ - limited, model year 'S' (1995).
GSF400 models
GSF400 - model years 'K' (1989), 'L' (1990), 'M' (1991), 'N' (1992), 'P' (1993), 'R' (1994), 'S' (1995).
GSF400V - VC engine, model years 'M' (1991), 'N' (1992), 'P' (1993), 'R' (1994), 'S' (1995), 'V' (1997).
GSF400Z - limited, model years 'L' (1990, SUZUKI 70th Anniversary "LIMITED" edition), 'M' (1991).
GSF400VZ - VC engine, limited, model years 'M' (1991), 'N' (1992), 'P' (1993), 'V' (1997).
Suzuki Bandit series