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Technical Overview
2009 GAS GAS Halley 450 Technical Analysis & Specification Breakdown
Engineered by GAS GAS for the enduro - offroad motorcycle segment, the 2009 GAS GAS Halley 450 pairs a 443 cc (27 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 97.0 x 60.8 mm (3.8 x 2.4 inches).
Rider ergonomics and chassis geometry center around a 890 mm (35 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,450 mm (57.1 in) wheelbase engineered for balanced agility and highway composure. The 7.4-liter (2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Standover Height
890 mm (35 in)
Engine
Displacement443.0 ccm (27.03 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Bore x Stroke97.0 x 60.8 mm (3.8 x 2.4 inches)
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMultidisc hidraulically operated.
Chassis
Frame TypeDeltabox*, made with rectangular CroMoly tubing.
Front Suspension45 mm upside-down fork
Front Travel230 mm (9.1 inches)
Rear SuspensionOne-piece aluminium swing arm
Rear Travel220 mm (8.7 inches)
Wheelbase1450 mm (57.1 inches)
Ground Clearance270 mm (10.6 inches)
Wheels & Brakes
Front Tyre90/90-21
Rear Tyre130/90-18
Front BrakesSingle disc. Double-piston caliper.
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Seat Height890 mm (35.0 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
