2009 YAMAHA V STAR 1300 XVS13AYB, 1304cc (80 cubic inch), liquid-cooled, short stroke, SOHC, 4-valve, 60 V-twin powerplant pumps out incredible amounts of class leading power and torque for unparalleled acceleration and cruising performance. Electric starting system features a mechanical centrifugal decompression device in the exhaust camshafts for easy, no-hassle starting. Liquid-cooling not only allows for higher state of tune because it maintains more stable operating temperatures, but also reduces mechanical noise for a quieter engine. In an effort to maintain the classic air-cooled appearance of the engine, cooling fins have been added as a styling touch. The short stroke engine design reduces the height of the engine, while the 60 degree V makes the engine more compact thereby centralizing mass and lowering the center of gravity for lighter more responsive handling. Classic V-twin pulse feeling and engine character highlight this new powerplant while annoying vibration has been eliminated. One-piece cylinder heads feature 4-valves per cylinder to provide optimum breathing efficiency for maximum power output. Each head is fitted with a single long reach spark plug. Stylish chromed cylinder head covers. The SOHC valve train features 36mm intake and 32mm exhaust valves with single springs for great power and torque. Valves angles are set at 20 degrees from centre. Specially designed roller rockers activate the valves. The rocker system allows a greater amount of valve lift without producing excessive camshaft wear and friction. The slipper portion of the rocker arm features a needle bearing to further reduce wear and slide resistance. The camshafts have been specially designed for use with roller rockers. Optimized squish area forces the fuel / air mixture toward the centre of the combustion chamber for more complete combustion and hence improved power and cleaner emissions. The water pump is integrated with the oil pump and is located inside the engine cases to keep a cleaner, more traditional air-cooled look to the powerplant. The engine is a wet sump design. The radiator is mounted between the front frame down tubes to minimize its appearance especially when viewing the machine from the side. Even the rad hoses have been discreetely placed for a cleaner appearance. An electric fan aids in cooling in stop and go traffic. Special cooling louvers direct air to the rad. Automatic hydraulic cam chain tensioners reduces mechanical noise and extend engine life.