As Yamaha has changed the world of motorcycles

Equipment

Yamaha Motor CIS

   R-series of Yamaha motorcycles famous worldwide thanks to its advanced technology, a race winning pedigree and characteristics. Since then, Yamaha has changed the world of motorcycles, firing the first generation YZF-R1, R-series self-determined as the range of models with high performance capable of competing for the championship title in the race categories of the Superbike and Supersport. R3 received a new tubular steel frame diagonal type. The main tubes of the frame have a diameter of 35 mm. The engine performs the role of the power element of the frame and attached thereto through one of the rubber support and three rigid supports. Lightweight Supersport bike for everyday use. Created using pure "DNA" R-series. Powerful and flexible" 320-CC inline 2-cylinder engine. Narrow and lightweight chassis with predictable sporty handling. Powerful braking system with ABS as standard. Designed for daily use in town and on the highway.

The engine

tubular steel frame diagonal type

   YZF-R3, equipped with a brand new 321-CC inline twin-cylinder four-stroke engine with two overhead camshafts and 4 valves per cylinder, has inherited many of the advanced technologies from more voluminous sports motorcycles Yamaha. The main concept of this new engine – "Supersport bike for everyday use". The architecture of the power plant is designed to provide good potential at low and medium engine speeds, as well as the responsiveness is high. Having a cylinder diameter 68,0 mm and stroke of 44.1 mm and a compression ratio of 11.2, this compact engine develops maximum power of 42 HP at 10750 rpm and maximum torque of 29.6 Nm at 9000 rpm On this model, applied to the throttle valve with a falling stream of air 26 mm inlet and 22.5 mm exhaust valves set at a very small angle, allowing 321-kubulau the engine to achieve high performance over a wide operating range.

Design

Yamaha YZF-R3

   The design of the engine is also used lightweight forged pistons. Besides the fact that they are 10% lighter than cast, forged pistons provide immediate response to rotation of the gas handle and high strength at extreme temperatures, which increases the efficiency and reliability of the engine at high revs. Another example of technology transfer in the framework of the R-series is the use of rods made from carbon alloy, which is lighter, stronger and better made than the standard rods. New motorcycle Yamaha YZF-R3 is equipped with a light DiaSil cylinder. This is the first application of advanced technology cylinder Yamaha engines. The company uses the technology of casting, in which the aluminum alloy is added to 20% silicon. The result is a microstructure with very high abrasion resistance, providing excellent thermal conductivity, which reduces weight and minimizes oil consumption. In addition, the ideal cylindrical shape allows the use of piston rings with less rigidity, which also reduces power loss due to friction. As at the latest 2-d and 3-cylinder engines of the MT family, on the R3 engine is applied to an offset cylinder. The centers of the cylinders are shifted closer to the exhaust pipes, which significantly reduces power, wimauma the pistons in the cylinder walls during the stroke of the stroke. This design reduces friction losses and improves the efficiency of the engine.