BMW GS parallel-twin

BMW F800GS, F800GSA, F700GS & F650GS

Manufacturer	BMW Motorrad
Production	F800GS (2008–) F800GSA (2013–) F700GS (2012–) F650GS (2008–12)
Predecessor	F650GS (single-cylinder)
Class	Dual-sport
Engine	798 cc (48.7 cu in), parallel-twin, water cooled, 4-stroke, DOHC, 8 valves
Bore / stroke	82 mm × 75.6 mm (3.23 in × 2.98 in)
Compression ratio	12.0:1
Top speed	>200 km/h (120 mph) (F800) 192 km/h (119 mph) (F700) 185 km/h (115 mph) (F650)
Power	63 kW (85 hp) @ 7,500 rpm (F800) 56 kW (75 hp) @ 7,300 rpm (F700) 53 kW (71 hp) @ 7,000 rpm (F650)
Torque	83 N·m (61 lbf·ft) @ 5,750 rpm (F800) 77 N·m (57 lb·ft) @ 5,300 rpm (F700) 75 N·m (55 lb·ft) @ 4,500 rpm (F650)
Transmission	6-speed
Suspension	Front: Telescopic fork, Ø 45mm, 230mm travel (F800) Telescopic fork, Ø 41mm, 170mm travel (F700) Telescopic fork, Ø 41mm, 180mm travel (F650) Rear: Dual swing arm, WAD strut, adjustable spring pre-load and rebound damping, 215mm travel (F800) Dual swing arm, spring strut, adjustable spring pre-load and rebound damping, 170mm travel (F700/650) Electronic Suspension Adjustment (ESA) optional (2013–)
Brakes	Front: Twin 300mm floating discs, dual piston floating calipers (F800/700) Single 300mm floating disc, dual piston caliper (F650) Rear: 265mm disc, single piston floating caliper ABS (optional before 2013)
Tyres	Front: 90/90-21, spoked wheel, tubed tyre (F800) 110/80-19, cast aluminium wheel, tubeless tyre (F700/650) Rear: 150/70-17, spoked wheel, tubed tyre (F800) 140/80-17, cast aluminium wheel, tubeless tyre (F700/650)
Wheelbase	1,578 mm (62.1 in) (F800) 1,562 mm (61.5 in) (F700) 1,575 mm (62.0 in) (F650)
Dimensions	L: 2,320 mm (91 in) (F800) 2,280 mm (90 in) (F700/650) W: 945 mm (37.2 in) (F800) 890 mm (35 in) (F700/650) H: 1,350 mm (53 in) (F800) 1,215 mm (47.8 in) (F700) 1,240 mm (49 in) (F650)
Seat height	880 mm (35 in) (F800) 820 mm (32 in) (F700/650)
Weight	191 kg (421 lb) (F800, 2013–) 185 kg (408 lb) (F800, 2008–12) 186 kg (410 lb) (F700) 179 kg (395 lb) (F650) (dry) 214 kg (472 lb) (F800, 2013–) 207 kg (456 lb) (F800, 2008–12) 209 kg (461 lb) (F700) 199 kg (439 lb) (F650) (wet)
Fuel capacity	16 L (3.5 imp gal; 4.2 US gal)
Related	F800GT, F800ST, F800S, F800R

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The BMW F series is a family of parallel-twin engine dual-sport motorcycles manufactured in Berlin, Germany by BMW Motorrad. Launched in 2008, the range comprises the F650GS, F700GS, F800GS, and F800GSA. In 2012 the F700GS replaced the discontinued F650GS, and in 2013 the F800GSA was introduced with a 24-litre (5.3 imp gal; 6.3 US gal) fuel tank and a larger front fairing and screen. The F800GT, and F800S both have belt drive.

Confusingly, and contrary to industry convention, each model's "number" does not refer to the engine capacity. Instead, each bike in the F-series range uses essentially the same 798 cc (48.7 cu in) engine, but with different power outputs and equipment levels. The parallel-twin engine was first used in the F800S, and is also used in the F800GT, F800R and F800ST, although these bikes are tuned to deliver peak power at a different RPM from the GS models. The GS models have longer suspension travel, needed for offroad use.

The F650GS name causes further confusion as it was previously used for a 652 cc (39.8 cu in) BMW bike fitted with a single-cylinder Rotax engine. It was produced from 2000–2007, then relaunched in 2009 as the G650GS, fitted with a Chinese-assembled engine of the same 652 cc capacity.

As of March 2013, the main technical differences between the F800 and F700 are as follows:

Although all bikes use the same basic engine, the F800 produces 85 hp (63 kW), which is 10 hp (7.5 kW) more power than the F700 and 14 hp (10 kW) more than the discontinued F650. Engines on both the F800 and F700 can be modified to deliver a reduced power output of 35 kW (47 hp) for European riders on restricted Category A2 licences.

The F800 and F700 are fitted with twin brake discs on the front while the F650 was fitted with one disc. Both bikes had anti-lock brakes (ABS), which were optional on the F800 before 2013 models and all years of the F650.

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Wikipedia