BMW F800 S & ST LAUNCH

 

before the riding began at Swartkops...

BMW is entering the midrange motorcycle segment with no less than two new models at the same time, while is continuing its powerful model initiative:
After a development period of just 47 months including the period of comprehensive concept studies the sporting F 800 S and the touring-oriented F 800 ST now form BMW Motorrads fourth model series, setting the foundation for more models to come through which BMW will be closing the gap between the F 650 single-cylinders and the "R" flat-twin models.

The engine is a brand-new Parallel-Twin with four-valve technology and 798 cc displacement developed by BMW Motorrad in close cooperation with Austrian specialist Bombardier-Rotax GmbH. The power unit is built in the Austrian Rotax plant according to BMW standards and specifications, from where it goes straight to the assembly lines of BMW in Berlin for final assembly.

With its powerful character, the two-cylinder model series combines impressive torque and pulling force, great responsiveness and good fuel economy all in one. Maximum output is 62.5 kW/85 hp at 8,000 rpm, with peak torque of 86 Nm the crankshaft running in slide bearings at 5,800 rpm. Mass forces are balanced on BMWs new Parallel-Twin by a unique concept never seen before on a production motorcycle: An additional swivelling conrod sets off first- and second-order mass forces, enabling the two-cylinder to run smoothly, with vibrations reduced to a minimum.

The specifications of the power unit featuring...    to be continued...

 

 

my group started off with a two-hour track session at Swartkops Raceway

The F800S and ST handled very well, on the track and on the road

having fun at Swartkops Raceway  - track photos by Mark Bow

at the ultra posh 5-star Kloofzicht Lodge outside Joburg   Photo - Kenn

the F800 all naked and all

Final drive - toothed belt

what the internals look like - many hacksaw blades later

 

 

Specifications

 

F 800 S

F 800 ST

Engine

 

 

Capacity

798 cc

 

Bore/stroke

82/75.6 mm

 

Output

62.5/85 kW/bhp @ 8,000 rpm

 

Torque

86 Nm @ 5,800 rpm

 

No. of cylinders

2

 

Compression/fuel

12.0 : 1/premium unleaded (95 octane)

               

Valve/gas control

DOHC (double overhead camshaft)

 

Valves per cylinder

4

               

intake/outlet

32/27.5 mm

 

Throttle valve diameter

46 mm

 

Carburetion

Electronic intake pipe injection, BMS-K engine management

 

Power transmission/gearbox

 

 

Clutch

Multi-plate clutch in oil bath, mechanically operated

 

Gearbox

Constant mesh 6-speed transmission

 

Primary ratio

1 : 1.930

 

Gear ratio steps   I

1 : 2.462

 

                           II

1 : 1.750

 

                           III

1 : 1.381

 

                           IV

1 : 1.174

 

                           V

1 : 1.042

 

                           IV

1 : 0.960

 

Rear-wheel drive

Toothed belt drive

 

Transmission ratio

1 : 2.353 (34/80)

 

Chassis

 

Frame type

Bridge frame made of aluminium profiles, load-bearing

 

Wheel control, front

Telescopic fork, stanchion diameter 43 mm

 

Wheel control, rear

Aluminium single-sided swing arm

 

Spring travel, front/rear

140/140 mm

 

Wheel castor offset

94.6 mm

 

Wheelbase

1,466 mm

 

Steering head angle

63.8

 

Brakes

Front - Double disc brake 320 mm  (ABS on request)

 

 

Rear - Single disc brake 265 mm   (ABS on request)

 

Wheels

Cast aluminium wheel

 

 

Front - 3.5 x 17

 

 

Rear - 5.5 x 17

 

Tyres

Front - 120/70-ZR17

 

 

Rear - 180/55-ZR17

 

Dimensions and weights

 

 

Total length

2,082 mm

2,195

Total length incl. mirrors

860 mm

               

Total width not incl. mirrors

738 mm

797

Seat height

820 (SA 790) mm

 

Dry weight

182 kg

187

DIN unladen weight, road ready

204 kg

209

Maximum authorised weight

405 kg

 

Fuel tank capacity

16 liters

 

Performance figures

 

 

90 km/h

3.4 l/100 km

 

120 km/h

4.4 l/100 km

               

0100 km/h

3.5 seconds

3.7

Maximum speed

over 200 kph

 

 

going down a very steep hill, on the way back from our out-ride   Photo - Kenn

Thanks to Rob Barnes, Cora Forssman and Lachlan Harris of BMW South Africa

for the ride on the F800 S & ST... a lekker bike on the track and on the road.