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Looking at the detailed specifications of both motorcycles BMW K1200S and Kawasaki GTR1400 Concours 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   Kawasaki-GTR1400 Concours
Picture of BMW - K1200SPicture of BMW - K1200S
BMW manufacturer Kawasaki
K1200S bike name GTR1400 Concours
Sport bike mootorcycle type Sport touring
since 2004 year 2010
218 / 90.5 / 121 cm overall size L/W/H(cm)223 / 79 / 135 cm
1157 cc engine displacement (cc)1352 cc
electronic intake pipe injection fuel supply method Fuel injection
13:1 compression ratio 10.7:1
79x59 mm bore and stroke 84x61 mm
157mm (6.2 inches) ground clearance 125mm (4.9 inches)
3.8litres (4 quarts) engine oil capacity4.0litres (4.2 quarts)
19.0 litres (5 gallons) fuel tank capacity 22.0 litres (5.8 gallons)
285 km/h (177 mph) top speed254 km/h (157 mph)
167 hppeak horsepower 155 hp
130 nm (95.9 ft lbs)max torque 136 nm (100.3 ft lbs)
226 kg (498 lbs) dry weight292 kg (644 lbs)
248 kg (547 lbs) curb weight (wet weight) 304 kg (670 lbs)
BMW motorrad duolever, central spring strut, 115mm wheel travel front suspension 43mm inverted fork with adjustable rebound and spring preload. The wheel travel is 113mm.
Die-cast aluminum single sided swingarm with BMW Motorrad paralever rear suspension Bottom link Unit-Trek with gas charged shock. The wheel travel is 136mm. Tetra lever rebound damping.
120/70-ZR17 front tyre size 120/70-ZR17
190/50-ZR17 rear tyre size 190/50-ZR17
6-speed multiple disc clutch in oil bath transmission type 6-speed with wet multidisc clutch
Electric ignition / starting digital ignition and electric starting
two discs with 320mm diameter and 4-piston caliper front brakes 2x310mm discs with 4-piston calipers
one 265mm disc and 2-piston caliperrear brakes single disc with 270mm diameter and 2-piston caliper
Shaft drivefinal drive typeShaft drive
Liquid coolingcooling typeLiquid cooling
5.60 l/100km (42 mpg)fuel economy (consumption)6.60 l/100km (35.6 mpg)
technical specifications of BMW K1200Ssee data separatelytechnical specifications of Kawasaki GTR1400 Concours

Although Kawasaki GTR1400 Concours has a bigger engine displacement than BMW K1200S 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. When one of two bikes with same engine displacement has a higher compression ratio it also has a better fuel economy because the mixture of air and fuel in the combustion chamber is burning at higher pressure and with better thermal efficiency.
The advantage of better fuel economy goes to BMW K1200S consuming 5.60 liters per 100 kilometers. On the other hand Kawasaki GTR1400 Concours is consuming 6.60 liters on every 100 kilometer trip. 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 BMW K1200S and Kawasaki GTR1400 Concours have the same width of their tires - 120 mm for the front tire and 190 mm for the rear one. 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 K1200S has bigger ground clearance than Kawasaki GTR1400 Concours (157mm vs 125mm). 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 254 km/h specified to its opponent Kawasaki GTR1400 Concours. Sometimes of course motorcycle speed statistics may be contradictory from various sources.Motorcycle with liquid cooling system
BMW K1200S is liquid cooled and so is the Kawasaki GTR1400 Concours. 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.
shaft final drive of  motorcycle The same final drive (shaft) is used with these two bikes BMW K1200S and Kawasaki GTR1400 Concours.Shaft drives are almost maintenance-free - they only need the oil from their reservoir periodically drained and changes but many miles can be covered with one change. They are also very smooth and quiet. Shaft drives on the other hand make the bike more expensive and a bit heavier. If we need to go in details then it should be mentioned that a small amount of power is lost with them because of the moving gears involved.
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 Kawasaki GTR1400 Concours is 10.7:1 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 4.0 litres for Kawasaki GTR1400 Concours. 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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