Intoducing this is the new generation from Yamaha in dual purpose class. The name is 2013 Yamaha WR250R. This bike design inspired from legendary WR off road series. The revolutionary is ready to tame the twistest road or the toughest trail with power, handling and style to spare. This generation offers the best of both worlds, a light and nimble aluminum frame, a powerful liquid cooled engine with titanium valves, and a long travel suspension for off-road adventures. From titanium intake valves to its aluminium frame and swingarm, this WR is a highly concentrated dual sport weapon.
The heart come with 250cc of engine type liquid-cooled DOHC 4-stroke 4 valves powerplant with super light titanium intake valves and electronic fuel injection. Besides that, this bike also equipp with some technology such as double overhead camfast, 4-valve combustion chamber features a compact "pent-roof" design for maximum breathing efficiency, steep valve angles, 11.5 degrees on the intake side and 12.5 degrees on the exhaust produce a more compact combustion chamber, dual electrode NGK CR9EK spark plug is located in the centre of the combustion chamber for fast, controlled combustion and great throttle response, cylinder design features cutaways that allow the air trapped under the piston to enter a side chamber (or cutaway) to reduce horsepower-robbing pumping losses and wide ratio 6-speed transmission features gear ratios designed for on and off road riding.
The 2013 WR250R also uses some special technology such as special design crankcases also utilize cutaways to reduce pumping losses. The crankcase cutaways match the cutaways in the cylinder to reduce pumping losses, special design high performance camshafts (intake & exhaust) provide outstanding class leading power. The cams feature a WPC (Wonder Process Craft) treatment that increases surface hardness for great durability and reduced sliding resistance. To reach maximum performance, this bike used 38mm Mikuni electronic throttle body fuel injection system is used. This system is a return-less FI system with TPS (throttle position sensor). This system provides excellent throttle response, great fuel economy, reduced emissions and a choke-free design. Throttle response and acceleration are excellent.
To get comfortable riding experience, this bike used lightweight, compact aluminum semi-double-cradle frame features a variety of components. The main frame is cast aluminum, while forged aluminum is used under the main frame below the steering head area and separate detachable down tubes are thin walled high tensile steel. For suspension used 46mm adjustable inverted Kayaba cartridge fork provide excellent suspension performance. Front fork adjustments include 19-way compression damping and 17-way rebound damping and monocross rear suspension system features a fully adjustable, piggy-back style shock. The damping rod is 14mm in diameter while the actual shock body is 46mm in diameter.
For braking system WR250R used 250mm fully floating front disc brake with "wave style" rotor is squeezed by a twin piston Nissin caliper fitted with lightweight 27mm aluminum pistons, Nissin front master cylinder features an 11mm piston and 230mm rear disc utilizes a lightweight "wave style" rotor. The Nissin single piston caliper and an integrated Nissin rear master cylinder (fluid reservoir is integrated into the top of the master cylinder to reduce weight) delivers strong, progressive stopping power with excellent control and feel. The 2013 Yamaha WR250R released at US MSRP Price: $6,690.
No comments:
Post a Comment