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Looking at the detailed specifications of both motorcycles Kawasaki Z 750 and Ducati Monster 821 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   Ducati-Monster 821
Picture of Kawasaki - Z 750Picture of Kawasaki - Z 750
Kawasaki manufacturer Ducati
Z 750 bike name Monster 821
Sport bike mootorcycle type Naked
2007-2012 year 2015
208.5 / 80.5 / 110 cm overall size L/W/H(cm)217 / 80 / 105 cm
748 cc engine displacement (cc)821 cc
Fuel injection 4x32mm Keihin fuel supply method EFI (electronic fuel injection), 53mm throttle bodies
11.3:1 compression ratio 12.8:1
68.4x50.9 mm bore and stroke 88x67.5 mm
155mm (6.1 inches) ground clearance 150mm (5.9 inches)
3.1litres (3.3 quarts) engine oil capacity3.4litres (3.6 quarts)
18.5 litres (4.9 gallons) fuel tank capacity 17.5 litres (4.6 gallons)
230 km/h (143 mph) top speed224 km/h (139 mph)
106 hppeak horsepower 112 hp
78 nm (57.5 ft lbs)max torque 89 nm (65.6 ft lbs)
207 kg (456 lbs) dry weight181 kg (399 lbs)
223 kg (492 lbs) curb weight (wet weight) 205 kg (452 lbs)
41mm telescopic fork, 120mm wheel travel front suspension 43mm inverted fork, 130mm wheel travel
Bottom link, 4-position rebound adjustment and 7-position preload adjustment rear suspension Aluminum double sided swing arm with 140mm rear wheel travel
120/70-ZR17 front tyre size 120/70-ZR17
180/55-ZR17 rear tyre size 180/60-ZR17
6-speed wet multiplate clutch, manual transmission type 6-speed wet multiplate clutch with control cable
Electric starting, digital ignition ignition / starting Electric starting, Marelli electronic ignition
dual 300mm disc with double piston caliper front brakes dual 320mm semi-floating discs, four-piston Brembo calipers, radially mounted, ABS
250mm diameter disc and single-piston caliperrear brakes single 245mm disc with double piston floating caliper, ABS
Chain drivefinal drive typeChain drive
Liquid coolingcooling typeLiquid cooling
5.20 l/100km (45.2 mpg)fuel economy (consumption)6.30 l/100km (37.3 mpg)
technical specifications of Kawasaki Z 750see data separatelytechnical specifications of Ducati Monster 821

The bigger engine size of Ducati Monster 821 in comparison to Kawasaki Z 750 doesn't mean that it is more powerful or better performing bike. We can see that the compression ratio of the second of this bikes is 12.8:1 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 that the fuel/air mixture in the combustion chamber has a greater pressure and is burnt more effectively and therefore such a bike would have better fuel economy (talking about equal engine displacement).
The bike with a better fuel economy is the Kawasaki Z 750 which can travel 45.2 miles with one gallon of fuel. Ducati Monster 821 on the contrary can travel 37.3 miles with a gallon. 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 Ducati Monster 821 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 Ducati Monster 821 (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 Ducati Monster 821 it would be behind it on the highway with 224km/h. Those speed parameters of course may vary from different sources and in many occasions they are based on owners reviews.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.
chain driven motorcycle Chain final drive is used with both motorcycles - the Kawasaki Z 750 and the Ducati Monster 821. 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.
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 Ducati Monster 821 is 12.8:1 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 Ducati Monster 821 is 3.4 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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