| MODEL | GASGAS SM 450 HALLEY 2009 |
| Year | 2009 |
| Engine Type | Four-stroke, single cylinder, DOHC, 4 valves |
| Displacement / Capacity | 449 cc / 27.4 cu in |
| Bore X Stroke | 97 x 60.8 mm |
| Compression Ratio | — |
| Cooling System | Liquid cooled |
| Max Power | 37.2 kW / 50 hp @ 7340 rpm |
| Max Torque | 49 Nm / 36.1 lb-ft @ 6890 rpm |
| Ignition | Integrated into the injection system |
| Induction | Electronic fuel injection (battery-less EFI) |
| Start System | Electric and kick |
| TRANSMISSION SPECS | |
| Lubrication | Wet sump |
| Gear Box | 6-speed |
| Clutch | Multi-disc, hydraulically operated |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Deltabox type, cromoly rectangular tubing, aluminium swingarm |
| Front Suspension | 45 mm Marzocchi fork, 295 mm / 11.6 in travel |
| Rear Suspension | Progressive linkage, Ohlins shock, 320 mm / 12.6 in travel |
| Front Brakes | Single 260 mm disc, 2-piston caliper |
| Rear Brakes | Single 220 mm disc, 1-piston caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 900 mm / 35.4 in |
| Wheelbase | 1475 mm / 58.1 in |
| Ground Clearance | 290 mm / 11.4 in |
| Dry Weight | 118 kg / 260 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 120/60-17 |
| Rear Tyre | 150/60-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 8.5 Litres / 2.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The Halley is a special version of the SM 450 FSE supermotard, carrying GasGas's long-used Halley name. The page lists the same engine, chassis and brakes as the standard SM 450 FSE, so any difference is not recorded in the specifications and is probably trim or colour.
