BMW GS parallel-twin

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BMW F800GS & F650GS
BMW F800GS black-yellow.jpg
ManufacturerBMW Motorrad
Production2008–
PredecessorF650GS (single cylinder)
ClassDual-sport
Engine798 Cubic centimetre, Straight-two, Water Cooled, Four-Stroke, DOHC, 8-valves
Power (physics)F800: 85 hp (63 kW) @ 7,500 Rpm
F650: 71 hp (53 kW) @ 7,000 Rpm
TorqueF800: 83 N·m (61 lb·ft) @ 5,750 rpm
F650: 75 N·m (55 lb·ft) @ 4,500 rpm
Transmission (mechanics)6-speed, O-Ring chain
SuspensionFront: Telescopic fork 41 mm
BrakesF800 Front: Twin 300 mm discs, 2 piston calliper; Rear: 265 mm disc, 1 piston calliper; Anti-lock braking system optional
F650 Front: Single 300 mm disc, 2 piston calliper; Rear: 265 mm disc, 1 piston calliper; Anti-lock braking system optional
TiresF800: Spoked wheels with 90/90 21 front tyre and 150/70 17 rear tyre
F650: Aluminium alloy wheels with 110/80 19 front tyre and 140/80 17 rear tyre
WheelbaseF800:1578 mm (62.1 in)
F650:1575 mm (62 in)
DimensionsLength F800: 2320 mm (91.3 in)
F650: 2280 mm (89.8 in) Width F800:945 mm (37.2 in) including mirrors
F650: 890 mm (35 in) including mirrors Height 1350 mm (53.1 in) excluding mirrors
F650: 1240 mm (48.8 in) excluding mirrors
Seat heightF800: 880 mm (34.6 in)
F650: 820 mm (32.3 in)
WeightF800: 185 kg (408 lb)
F650: 179 kg (395 lb) (Dry weight (motorcycle)), F800: 207 kg (456 lb)
F650: 199 kg (439 lb) (Wet weight (motorcycle))
Fuel capacityAuto litres
RelatedF800S, F800ST, F800R

The BMW F800GS and F650GS are members of the GS family of Dual-sport motorcycles manufactured in Germany by BMW Motorrad. Both bikes were launched in 2008, and use the same 798 cc Straight-two with Chain drive, but with different power outputs and equipment levels. The F650GS name can cause confusion as it was also used for a 652 cc BMW bike fitted with a single cylinder Rotax engine, produced from 2000–2007; a bike which has now been relaunched as the G650GS fitted with a Chinese engine of the same 652 cc capacity. The parallel-twin engine was first used in the F800S,[1] and is also used in the F800ST and F800R, although these bikes are tuned to deliver peak power at a different RPM from the GS models. On the GS models the engine is angled further backwards than the other bikes to provide longer suspension travel, needed for offroad use.[2]

Model differences


Although both bikes use the same basic engine, there are a number of differences.[2] The F800 produces 15 bhp (11 kW) more power than the F650, which can be reduced to deliver just 25 kW (34 hp) for European riders on restricted Category A licences.[3][4] The F800 is fitted with twin Disc brake on the front while the F650 is fitted with just one disc.[2] Both bikes feature optional Anti-lock braking system (ABS). The F800 features Wire wheels with a 21 inch front and 17 rear, while the F650 has Alloy wheel with a 19 inch front and 17 rear. The standard seat height on the F800 is 880 mm (34.6 in), compared with 820 mm (32.3 in) for the F650, which can be further reduced with lowered seat and suspension to 820 mm (32.3 in) making it suitable for much shorter riders.

References


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