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Looking at the detailed specifications of both motorcycles Kawasaki Z 750 and BMW F 800 ST 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. The most appropriate method of exploring them is to actually ride each of them or at least sit on them to see how they feel.

Kawasaki-Z 750   vs   BMW-F 800 ST
Picture of Kawasaki - Z 750Picture of Kawasaki - Z 750
Kawasaki manufacturer BMW
Z 750 bike name F 800 ST
Sport bike mootorcycle type Sport touring
2007-2012 year Since 2006
208.5 / 80.5 / 110 cm overall size L/W/H(cm)208 / 86 / 115.5 cm
748 cc engine displacement (cc)798 cc
Fuel injection 4x32mm Keihin fuel supply method Fuel injection - electronic
11.3:1 compression ratio 12:1
68.4x50.9 mm bore and stroke 82x75.8 mm
155mm (6.1 inches) ground clearance 145mm (5.7 inches)
3.1litres (3.3 quarts) engine oil capacity2.9litres (3.1 quarts)
18.5 litres (4.9 gallons) fuel tank capacity 16.0 litres (4.2 gallons)
230 km/h (143 mph) top speed229 km/h (142 mph)
106 hppeak horsepower 85 hp
78 nm (57.5 ft lbs)max torque 86 nm (63.4 ft lbs)
207 kg (456 lbs) dry weight182 kg (401 lbs)
223 kg (492 lbs) curb weight (wet weight) 204 kg (450 lbs)
41mm telescopic fork, 120mm wheel travel front suspension 43mm telescopic fork with 140mm wheel travel
Bottom link, 4-position rebound adjustment and 7-position preload adjustment rear suspension die-cast aluminium single-sided swingarm, rebound damping adjustable with 140mm travel
120/70-ZR17 front tyre size 120/70-ZR17
180/55-ZR17 rear tyre size 180/55-ZR17
6-speed wet multiplate clutch, manual transmission type 6-speed
Electric starting, digital ignition ignition / starting Electric
dual 300mm disc with double piston caliper front brakes Dual 320mm discs with 4-piston Brembo calipers
250mm diameter disc and single-piston caliperrear brakes Single 265mm disc with 2-piston caliper, optional ABS
Chain drivefinal drive typeBelt drive
Liquid coolingcooling typeLiquid cooling
5.20 l/100km (45.2 mpg)fuel economy (consumption)5.10 l/100km (46.1 mpg)
technical specifications of Kawasaki Z 750see data separatelytechnical specifications of BMW F 800 ST

The bigger engine size of BMW F 800 ST in comparison to Kawasaki Z 750 doesn't mean that it is more powerful or better performing bike. The bigger compression ratio of 12:1 belongs to the second bike. 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.
One of the advantages of BMW F 800 ST compared to Kawasaki Z 750 is the better fuel economy of 46.1 mpg it has. The other bike has a fuel economy of 45.2 mpg. The fuel economy of a motorcycle is either measured in mpg or l/100km, the first showing how many miles can be ridden with a gallon of fuel and the second showing how many litters of fuel are consumed on a 100km ride.
motorcycle tires The producer of each bike specifies the sizes of its front and rear tyre. Your type of riding is also to be taken into account here. Tires have a code of numbers and letters printed on their sides and these are important to be understood properly when looking for matching tires. The width of the tire measured in millimeters is shown first. Both motorcycles Kawasaki Z 750 and BMW F 800 ST have the same width of their tires - 120 mm for the front tire and 180 mm for the rear one. The next number refers to the tire profile. And the third number indicats the diameter of the rim in inches. A good way to save some time and money is to purchase your motorcycle tires online at competitive price.
The ground clearance of Kawasaki Z 750 (155mm) is bigger than the one of BMW F 800 ST (bbb2mm). 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. In simple terms that would be the shortest line among all the lines drawn between the surface of the road and any mechanical part of the motorcycle.
Comparing the top speed values of both motorcycles we can see that Kawasaki Z 750 is the faster one with 230km/h. As per the technical data of BMW F 800 ST it would be behind it on the highway with 229km/h. While some motorcycle manufacturers pretend for precise top speed parameters, often these values are only approximate.Liquid cooled motorcycle engine
Both motorcycles are liquid cooled. Liquid-cooled engines have a narrower range of operating temperatures compared to the air-cooled ones. Once the operating temperature is reached (the engine is warmed up), it runs at a pretty constant temperature. The circulation of the coolant from the radiator to the engine is helped by the water pump. The amount of cooling can be regulated via thermostat, which helps holding the temperature at a relatively constant level. Water jackets in a liquid cooled engine act as sound insulators and make it quieter.
As per their technical specifications both motorcycles have different types of final drive implementation.
chain driven motorcycle Chain final drive is used with the Kawasaki Z 750. Chain drives are by far the most popular final drive technology in the history of motorcycles and are the most economical way to drive power from the engine to the rear wheel. However they are not as smooth as belts and shafts and also require frequent care like cleaning and keeping the chain properly lubricated.The BMW F 800 ST is driven by a belt.
Compression ratio 11.3:1 means that the volume of gas in the cylinder when the piston is at the bottom of its stroke refers to the volume of gas when the piston is at the top of its stroke as 11.3:1. The compressio ratio of BMW F 800 ST is 12:1 and it is 11.3:1 for Kawasaki Z 750 according to the motorcycles technical data above. Motorcycles with higher compression ratio may be recommended to use premium fuel only in order to avoid engine knocking. If you got a motorcycle with a greater compression ratio for its specific engine it is getting better fuel economy than it would if it had a lesser compression ratio.
The good quality of the engine oil is an important factor in keeping the motorcycle in peak condition. There are different types at different prices on the market - mineral, highperformance, all-purpose part-synthetic and synthetic oil. The engine oil is to be changed on every 3700 miles (or 6000 kilometers) as a general rule. If you you synthetic oil then bigger mileage can be allowed between oil changes. Depending on the oil filter it needs to be replaced on each or every two oil changes. The technical specs show that the Kawasaki Z 750 takes 3.1 litres of engine oil while the oil capacity of BMW F 800 ST is 2.9 litres. 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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