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Looking at the detailed specifications of both motorcycles Kawasaki W 800 and Kawasaki Ninja 250R is a proper approach to determine which of the two is more likely to match your style of riding and to satisfy your preferences. Your choice of motorcycle should be all about your individual preferences and comfort level. 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. A good way to find the most suitable one among them would be to sit on each of them and if possible ride it for a while.

Kawasaki-W 800   vs   Kawasaki-Ninja 250R
Picture of Kawasaki - W 800Picture of Kawasaki - W 800
Kawasaki manufacturer Kawasaki
W 800 bike name Ninja 250R
Naked mootorcycle type Sport bike
since 2011 year 2008
218 / 79 / 107.5 cm overall size L/W/H(cm)208 / 71 / 111.5 cm
773 cc engine displacement (cc)248 cc
Fuel injection fuel supply method 2 x Keihin CVK30
8.4:1 compression ratio 11.6:1
77x83 mm bore and stroke 62x41.2 mm
130mm (5.1 inches) ground clearance 135mm (5.3 inches)
3.0litres (3.2 quarts) engine oil capacity1.9litres (2 quarts)
14.0 litres (3.7 gallons) fuel tank capacity 18.2 litres (4.8 gallons)
155 km/h (96 mph) top speed168 km/h (104 mph)
47 hppeak horsepower 30 hp
60 nm (44.3 ft lbs)max torque 22 nm (16.2 ft lbs)
197 kg (434 lbs) dry weight151 kg (333 lbs)
216 kg (476 lbs) curb weight (wet weight) 170 kg (375 lbs)
39mm telescopic fork front suspension 37mm hydraulic telescopic fork, 119mm wheel travel
twin shock absorber rear suspension uni-trak with aluminum linkage with gas-charged shock, 5-way adjustable preload. The wheel travel is 130mm.
100/90-19 front tyre size 110/70-17
130/80-18 rear tyre size 130/70-17
5-speed wet, multiple disc, manual transmission type 6-speed wet, cable operated
Electric starting, digital ignition ignition / starting Electric starting, TCBI ignition with digital advance
1x300mm diameter disc and two-piston caliper front brakes single 260mm hydraulic petal disc and double-piston caliper
160mm drumrear brakes single 220mm petal disc and 2-piston caliper
Chain drivefinal drive typeChain drive
Air coolingcooling typeLiquid cooling
5.10 l/100km (46.1 mpg)fuel economy (consumption)4.10 l/100km (57.4 mpg)
technical specifications of Kawasaki W 800see data separatelytechnical specifications of Kawasaki Ninja 250R

Although Kawasaki W 800 has a bigger engine displacement than Kawasaki Ninja 250R it doesn't necessarily mean it is more powerful or better performing bike. The second of the bikes has a bigger compression ratio (11.6:1) which is economically better. 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. If we have two motorcycles with the same engine displacement but one of them has a bigger compression ratio it will has lesser fuel consumption.
The advantage of better fuel economy goes to Kawasaki Ninja 250R consuming 4.10 liters per 100 kilometers. On the other hand Kawasaki W 800 is consuming 5.10 liters on every 100 kilometer trip. 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.
bike tires Motorcycle tyres come in variety of sizes and these sizes are strongly specified for each model. The right choice also depends on your style of riding, whether you are speeding and riding agressively. 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. Firstly the code shows the width of the tire measured in millimeters. Both motorcycles have the same with of their rear tires - 130 mm. The second number show the aspect ratio. The third of the code numbers reffers to the size of the rim and it is measured in inches. Looking online for motorcycle tires is a good way to easily find the right size at low price.
As per the data sheets Kawasaki Ninja 250R has a bigger ground clearance (135mm) than Kawasaki W 800 (130mm). Usually given in millimeters in the technical data sheets, the ground clearance refers to the space between ground level and underside of a motorcycle’s chassis and sometimes is called ride height. 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.
Kawasaki Ninja 250R appears to be faster than Kawasaki W 800 with top speed of 168km/h against 155km/h for the other bike. While some motorcycle manufacturers pretend for precise top speed parameters, often these values are only approximate.
chain driven motorcycle Both motorcycles Kawasaki W 800 and Kawasaki Ninja 250R have the same final drive - chain. 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 chains have their down points - more frequent need of maintenance (lubrication and cleaning) which means that a biker should always keep an eye on the chain especially in rainy days or dusty roads.
Compression ratio of a motorcycle engine is the ratio of the volume of the combustion chamber when the piston is at the bottom of the stoke and its volume when the piston is at the top of the stroke. The value of the compression ratio of Kawasaki Ninja 250R is 11.6:1 based on the information in its technical data and for Kawasaki W 800 the ratio is 8.4:1. Premium fuel might be recommended for some motorcycles with high levels of compression ration 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. Engine oils are different types as synthetic, mineral, part-synthetic and they all come at their price and qualities. 3700 miles (6000 km) between oil changes is widely accepted rule. If you you synthetic oil then bigger mileage can be allowed between oil changes. The oil filter needs to be replaced too and that is usually to be done with the oil change. According to the technical specs the engine oil capacity is 3.0 litres for Kawasaki W 800 and 1.9 litres for Kawasaki Ninja 250R. When changing the oil it is advisable to put less than the specified oil capacity and to check the level. The proper amount of oil needed is best judged while observing the reading on the level sight window (or the dipstick).

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