superseded by the sport-touring orientated GSX-F series, marketed in the US as Katanas. The original Hans Muth designed GSX-S Katanas were also dropped from Suzuki's global lineup by the mid-1980s, with sporting/racing duties better served by the lighter SACs (Suzuki Advanced Cooling System) air/oil-cooled GSX-Rs. The GSX 1100 lived on with significant styling changes for the 1984 model year with the addition of a 16" front end, including a full-faired 124 bhp monster of a musclebike, the GSX 1100EFE (US: GS1150EF). The larger bikes, although still sought-after as classic superbikes, were also replaced by the GSX-F (Katana in North America only) lineups, based on detuned GSX-R engines with significant body styling changes such as an electrically operated screen in the 1100F, upgraded suspension and braking components, and frame revisions. Current GSX The GSX 750S (US: Katana) received an updated engine for 1984, along with Suzuki's other big-bore four-valver models. This is the engine that the first Suzuki GSX-R Series bikes were based on. Current GSX models are powered by derivatives of this in-line, four-cylinder engine with four valves per cylinder, which is also used in the Suzuki Bandit Series up to the end of the 2006 model year. They feature a combined air/oil cooling system called SACS (for 'Suzuki Advanced Cooling System'). The current GSX series is produced as the GSX600F and GSX750F faired sport touring models, now in their second generations, and the unfaired, twin-shock GSX 750 and GSX 1400 models. The bike was used to win the 2007 Endurance FIM World Championship. The GSX650F, produced from 2008, is essentially a variation on the Bandit 650, with much the same specification and components. The additional lower fairing, however, gives it a sportier look similar to that of the Suzuki GSX-R Series (though the Bandit chassis means that it carries 110 lb extra weight compared with a GSX-R), the engine has had a small amount of remapping to encourage revs, and the suspension is tweaked. It also has a one-piece seat, unlike the Bandit. The earlier GSX750 and GSX1200 Inazuma (GSX750W and GSX1200W) were offered in Japan and Europe for a short time besides the GSF1200 Bandit to cater for a clientele that went for a more traditional styling and a somewhat higher build quality. When they proved sufficiently popular for overseas export, they were quickly developed into the current GSX 1400. These modern non-US GSX-models carry little in common