YZF-R15

Rating:
Recommended by 71%SIDDSOFT members

Fuel Consumption (kms/litre):
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Yamaha has kept its promise and has launched the Yamaha YZF R15 and now that it is launched, we bring to you the full specification and features of one of the most anticipated launches of 2008.

Engine

Liquid-cooled: First India-made model with cooling method in the Indian market! Liquid-cooled engines provide stable performance, reduce vibrations, and offer a high quality ride.
One characteristic of YZF-R15’s new engine is that it is liquid-cooled. The engine is surrounded by a water jacket in which coolant liquid circulates to cool the engine. While this method is widely used in automobiles and large capacity motorcycles, there are very few examples of motorcycles of this class due to increased weight from components such as radiators. YZF-R15 uses a special compact and lightweight aluminum radiator and a body design that utilizes airflow for heat dissipation. This has enabled us to create a lightweight, compact body while retaining its stable performance.

The benefits of using this method include stable performance during long-distance, high-speed riding and hill climbing. A liquid-cooled engine does not need heat-dissipating fins and therefore the engine is able to deliver its best performance without being affected by temperature. Additionally, because the head and cylinder are enclosed in a water jacket, mechanical noise from the engine is reduced dramatically.

The newly developed engine delivers agile riding performance, and excellent performance on straight stretches of road as well as on winding roads. YZF-R15 also delivers excellent environmental performance. These traits are a must for an “urban supersport.” The ride is unprecedented in terms of both excitement and quality.

DiASil Cylinder: The DiASil Cylinder was born from YAMAHA’s world-class aluminum die casting technology.

DiASil Cylinders are all-aluminum cylinders made by YAMAHA’s proprietary aluminum die casting technology. An aluminum alloy with 20% silicon content is used to create a very hard, reliable cylinder surface, making conventional iron sleeves obsolete. As a result, the entire cylinder can be made of aluminum, a better conductor of heat, which means the cylinder delivers better heat dissipation and less weight. (Aluminum’s heat conductivity is 3.1 times that of iron.)

YZF-R15 is equipped with this all-aluminum cylinder called the DiASil Cylinder and a forged piston, the same type of piston used in YAMAHA’s supersport bikes. The fact that both the piston and cylinder of YZF-R15 are all-aluminum ensures excellent heat dissipation, eliminates heat-induced engine power loss, and helps improve fuel efficiency. The DiASil Cylinder is given a special surface treatment to prevent oil evaporation from the cylinder’s surface and improve oil consumption. The cylinder also has excellent hardness and is considerably resistant to wear compared to conventional iron sleeves.

Additionally, the piston is made in a forging process, the optimum way of achieving lightweight designs.The reciprocating mass with the forged piston is approximately 20% less ( according to Yamaha test ) than with an engine of the same displacement fitted with a conventional cast aluminum piston. Resulting in an invigorating feeling when revving up.

Conventional pistons are typically made in a casting process where molten aluminum is cast in a mold. YAMAHA developed its proprietary “controlled forging technology” in 1997, which enables mass production of forged aluminum pistons. These pistons have been used in sport models such as the R series. The same manufacturing process was used to develop YZF-R15. Forged pistons retain the excellent strength of aluminum alloys because the metallurgic matrix of aluminum is not affected during the fabrication process. Therefore, the piston can be made lighter and thinner.

YZF-R15 is packed with state-of-the-art technology that is used in the world’s supersport bikes.

Fuel Injection: Fuel injection is used to ensure excellent fuel efficiency as well as environmental friendliness.

Deltabox Frame: The frame, which forms the basis for riding comfort and handling performance, is a Deltabox frame which delivers superior rigidity balance.

Linked type Monocross suspension: YZF-R15 is equipped with a linked type monocross suspension that delivers a comfortable ride and a cushioning performance that is less prone to bottoming out. In particular, it reduces annoying “sinking” when riding tandem.

Design

The “R” Design: This characteristic of motorcycles designed by YAMAHA as represented by the R series reflects the philosophy running through these models — expressing performance visually.

For example, YZF-R6 shows a strong body line that springs up in a single line from the rear axle to the pivot and then to the head pipe. This is a visual expression of the straight shape of the Deltabox frame. These elements are a visual expression of “frame rigidity.” Viewed from the side, the shape created by the side panel and the upper surface of the tank creates an impression of the center of gravity shifting to the front tire. This is a visual representation of how the front tire grips the road in its sporty running performance. Needless to say, YZF-R1, with its athletic build, is also a visual expression of performance. A characteristic of the R series is that, when you view the machine, you get a sense of its concept and performance.

Yamaha YZF R15 Specifications

Engine type	Liquid-cooled, 4-stroke, SOHC, 4-valve
Cylinder arrangement	Single cylinder
Displacement	149 .8cc
Bore x Stroke	57×58.7mm
Compression ratio	10.4:1
Maximum power	17PS / 8,500rpm
Maximum torque	15 N.m / 7,500rpm
Starting system	Electric Start
Lubrication	wet sump
Engine oil capacity	1.0 liters
Fuel tank capacity	12 liters
Fuel supply system	Electronic fuel injection
Ignition system	T.C.I
Primary / Secondary reduction ratio	3.042 / 3.000
Clutch type	Constant-mesh wet multi-plate
Transmission type	Return type 6-speed
Gear ratios	1st=2.833, 2nd＝1.875, 3rd:=1.364, 4th=1.143, 5th=0.957, 6th=0.84

Frame type	Deltabox Frame
Caster / Trail	26° / 100mm
Tire size (Front / Rear)	80/90-17 / 100/80-17
Brake type (Front / Rear)	Hydraulic, single disc (Front / Rear)
Suspension type (Front Rear)	Telescopic / Linked type Monocross
Headlight	12V35W / 35W＋35W

Overall length x width x height	1,995mm x 670mm x 1,070mm
Seat height	790mm
Wheelbase	1,290mm
Minimum ground clearance	160mm
Dry weight / Curb weight	120kg / 131kg

Ex. Showroom price of Yamaha R15: Rs. 97,500