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Looking at the detailed specifications of both motorcycles BMW K1200S and BMW F800GT is a proper approach to determine which of the two is more likely to match your style of riding and to satisfy your preferences. The decision on your next motorcycle purchase should be all based on your personal preferences for speed, handling and comfort. A good way to narrow the circle of favourite bikes is to compare their technical specifications and select just a few that are really matching your style and needs. Then the most appropriate judgement can be made when each of them is taken for a real ride.

BMW-K1200S   vs   BMW-F800GT
Picture of BMW - K1200S
BMW manufacturer BMW
K1200S bike name F800GT
Sport bike mootorcycle type Sport touring
since 2004 year 2013
218 / 90.5 / 121 cm overall size L/W/H(cm)215.6 / 90.5 / 125 cm
1157 cc engine displacement (cc)798 cc
electronic intake pipe injection fuel supply method electronic intake injection, 45mm throttle bodies
13:1 compression ratio 12:1
79x59 mm bore and stroke 82x75.8 mm
157mm (6.2 inches) ground clearance 165mm (6.5 inches)
3.8litres (4 quarts) engine oil capacity3.1litres (3.3 quarts)
19.0 litres (5 gallons) fuel tank capacity 15.0 litres (4 gallons)
285 km/h (177 mph) top speed201 km/h (125 mph)
167 hppeak horsepower 90 hp
130 nm (95.9 ft lbs)max torque 86 nm (63.4 ft lbs)
226 kg (498 lbs) dry weight184 kg (406 lbs)
248 kg (547 lbs) curb weight (wet weight) 213 kg (470 lbs)
BMW motorrad duolever, central spring strut, 115mm wheel travel front suspension 43mm Marzocchi inverted forks, non-adjustable. 125mm wheel travel
Die-cast aluminum single sided swingarm with BMW Motorrad paralever rear suspension shock, adjustable spring preload and rebound, 125mm wheel travel
120/70-ZR17 front tyre size 120/70-ZR17
190/50-ZR17 rear tyre size 180/55-ZR17
6-speed multiple disc clutch in oil bath transmission type 6-speed gearbox, constant mesh
Electric ignition / starting Electric
two discs with 320mm diameter and 4-piston caliper front brakes dual discs with 320mm diameter, 4-piston calipers, ABS
one 265mm disc and 2-piston caliperrear brakes Single 265mm disc with 2-piston caliper and ABS
Shaft drivefinal drive typeBelt drive
Liquid coolingcooling typeLiquid cooling
5.60 l/100km (42 mpg)fuel economy (consumption)5.10 l/100km (46.1 mpg)
technical specifications of BMW K1200Ssee data separatelytechnical specifications of BMW F800GT

Although BMW K1200S has a bigger engine displacement than BMW F800GT it doesn't necessarily mean it is more powerful or better performing bike. We can see that the compression ratio of the first of this bikes is 13:1 and is the bigger one. This ratio is the relation of the volume in the cylinder when the piston is at the bottom of the stroke to the volume in the cylinder when the gas is compressed and the piston is at the top of the stroke. The bigger compression ratio means better fuel economy comparing engines with the same displacement because the mixture of fuel and air in the combustion chamber burns more effectively.
The better fuel economy of 5.10 l/100km belongs to BMW F800GT compared to the BMW K1200S's fuel consumption of 5.60 l/100km. Measuring the fuel economy in mpg shows how many miles of ride are covered by a gallon of fuel and measuring in l/100km shows the average fuel consumption in litters for every 100 kilometers riding.
front and rear tires The producer of each bike specifies the sizes of its front and rear tyre. Another considerable factor here is your own riding style. To choose the right tire size firstly you need to understand the meaning of the numbers printed on the size of the tire. The width of the tire measured in millimeters is shown first. Both motorcycles have the same with of their front tires - 120 mm. The aspect ratio of the tire is represented by the second number of the code. The third number shows the size of the rim - its diameter measured in inches. Looking online for motorcycle tires is a good way to easily find the right size at low price.
BMW F800GT has bigger ground clearance than BMW K1200S (165mm vs 157mm). The distance between the chassis and the base of the tyre is called ride height or also ground clearance of a motorcycle and is usually given in millimeters in the technical specifications. This is the shortest line between the body of a motorcycle and the surface of the road.
BMW K1200S is the faster of the two with top speed of 285 kilometers per hour against the max speed of 201 km/h specified to its opponent BMW F800GT. However sources may vary as to whether these top speed parameters are precise or only approximate.Motorcycle with liquid cooling system
BMW K1200S is liquid cooled and so is the BMW F800GT. The pretty constant ranges of operating temperature are typical for the liquid cooled engines. Therefore liquid cooled motors can run with carburetion set to burn all the fuel in the mixture. The coolant is circulating into the radiator and back to the engine driven by the water pump. The amount of cooling can be regulated via thermostat, which helps holding the temperature at a relatively constant level. However the water pump, the thermostat, the radiator and all the linking gear makes it a bit more complex.
As per their technical specifications both motorcycles have different types of final drive implementation.The BMW K1200S is driven by shaft.The BMW F800GT is driven by a belt.
Compression ratio - this parameter refers to how the cylinder's space changes from when the piston is down at its lowest point to when the piston is up at its highest point in the stroke. Its value for BMW K1200S is 13:1 and for BMW F800GT is 12:1 based on the technical data of the motorcycles. To avoid engine knocking when compression ratio is high those motorcycles might be recommended to use premium fuel only. It plays a big role in engine efficiency because bigger compression ratio means better thermal efficiency and more mileage with the same amount of gas.
To keep the engine in good health it is important to observe the good qulity and proper level of the motor oil. Many different types of engine oils are available as minerral, part-synthetic and synthetic and they all come at different price. 3700 miles (6000 km) between oil changes is widely accepted rule. More kilometers between two oil changes is accepted when synthetic oil is used. A good practice is to replace the oil filter with each or every second oil change. Both motorcycles have different oil capacity according to the technical specs - 3.8 litres for BMW K1200S and 3.1 litres for BMW F800GT. This oil capacity values are with informative purpose only. Observing the currrent level on the dipstick or the level sight window is the best way to pour the proper amount of oil.

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