Yamaha - YZF - R15:

Features:

Liquid-cooled engines provide steady performance, lessen vibrations, and offer a high quality ride. A liquid-cooled engine does not need heat-dissipating fins and therefore the engine is able to bring 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 noticeably. The newly developed engine delivers agile riding performance and dazzling performance on straight stretches of road as well as on winding roads.

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

It 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.

This characteristic of motorcycles designed by YAMAHA as represented by the R series reflects the philosophy running through these models -- expressing performance visually. 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 tyre. This is a visual representation of how the front tyre 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.

When viewed from the front, it gives a sense of volume that seems well beyond its 150cc displacement. This does not simply mean that it is huge, but that it is grounded in the Art of Engineering which transforms function into art.

YAMAHA's Humachine Technology involves studying the form of the motorcycle actually in motion with the rider on it. The R series is the embodiment of 1) wide frontal space that protects the rider, 2) easy to ride seating area that gives riders the freedom of movement and allows them to steer effectively, 3) the glamorous tail treatment that takes into account the management of airflow behind the rider, and 4) a sexy racing form that brings all 3 of these elements together in a harmonious package. These characteristics have been splendidly reproduced in YZF-R15.
 

Specs :

 

Engine
Engine Type :	Liquid-cooled, 4-stroke, SOHC, 4-valve
Cylindrical Arrangement :	Single cylinder
Displacement :	149 .8cc
Bore & Stroke :	57 &  8.7mm
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

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Yamaha YZF - R15