BMW GS parallel-twin
The BMW F 800 is a series of motorcycles by the vehicle manufacturer BMW motorcycle. The motorcycles have a manufactured Rotax in-line two-cylinder engine with 798 cc displacement.
The bikes are available in the following versions:
- F 800 S ( athletes) 2006-2010
- F 800 ST ( Sports Tourer ) 2006-2012
- F 800 GS ( enduro ) since 2008
- F 800 R ( naked bike ) since 2009
- F 800 GT ( Sports Tourer ) since 2012, successor to the F 800 ST
- F 800 GS Adventure ( enduro ) Since 2013
The series closed the gap in the BMW Motorrad range between the single-cylinder entry-level models of the F produced until 2008 650 series and the big R and K series. Since 2008, the F 650 GS F 700 GS or a derated variant of the two-cylinder engine built in, which is also used in the F- 800 series.
- 2.1 F 800 S
- 2.2 F 800 ST
- 2.3 F 800 GS
- 2.4 F 800 R
- 2.5 F 800 GT
Technology
The series has a water-cooled parallel twin engine jointly developed with Rotax (two- cylinder engine ), timing belt rear wheel drive (for F 800 S, ST, GT) or O -ring chain ( at F 800 R and F 800 GS). All models have a shock damping in the secondary drive. The arrangement of the tank under the seat is the same for all motorcycles of the series.
Motor
As a novelty in the parallel twin engine between the cylinders contains a Ausgleichspleuel sitting on its own crank pin with 180 ° stroke offset to the pistons. The Ausgleichspleuel performs a horizontally arranged under the swing gear. The crankshaft is supported in quadruplicate. A particularly good engine smoothness is achieved. The four valves per cylinder are controlled by dual overhead camshafts. The engine noise is like the boxer engines, thanks to the uniform Zündversatzes of 360 °. The engine is equipped with an injection system and a regulated three-way catalyst.
Specifications
Models
F 800 S
The F 800 S is a semi- faired sport bike. It was 2006, the first model of the F -800 series, equipped with light alloy bridge frame ( in this construction is the engine a stressed member), single-sided swingarm and belt drive. The production of the F 800 S was discontinued in 2010.
F 800 ST
The F 800 ST is largely identical to the F 800 S, but has a full fairing, a tourentauglicheren, higher handlebars, a higher disc, different tires and a luggage rack and a more comfortable seat.
F 800 GS
The F 800 GS is a travel enduro with trellis frame, upside- down forks and chain drive.
F 800 R
The F 800 R is a naked bike with bridge frame and chain drive.
F 800 GT
The F 800 GT was included in the model program in 2012 and is the successor to the F 800 ST. The Sports Tourer offers a slightly increased comfort and increased efficiency compared to the ST, but was otherwise changed only minimally.
BMW F 800 GS
BMW F 800 S