Featuring a revolutionary crossplane crankshaft engine and unique uneven firing order, the production model of the YZF-R1 delivers near linear torque providing smoother acceleration and greater levels of grip than previously thought possible, setting new standards for one litre sportsbikes.
Modifications to the machine for World Superbike racing from the homologated model include different cam-shafts, pistons, valves, an enlarged radiator for extra cooling and the addition of an oil cooler and various other parts. The YZF-R1 has no rear sub-frame but incorporates a strengthened frame. The exhaust is unique, and was developed in partnership with Akrapovic. The standard fuel tank has also been replaced with a lightweight version with an increased capacity, within FIM regulations. The bike features the latest Magneti Marelli (MHT) electronic systems with over 30 sensors on the bike to monitor variables such as temperature and pressure of air, oil, water and fuel. The temperature of the brake disc and the tyre is also measured, as well as brake pressure, suspension travel, speed, acceleration, throttle position, camshaft position and crankshaft position to name a few more. The swing arm is also developed purely for the WSB race bike.
Many other details have been modified in parts and body design, a variety of carbon and titanium bits and pieces are used that make the Yamaha WSB R1 one of the most sophisticated bikes on the grid.
For 2011 development has been focused on further improved weight balance of the bike, resulting in again a further optimisation of fuel tank position as well as a power increase and further electronic systems improvements for traction -, anti-wheelie- and torque control as well as engine brake control.
Further regulation changes to the 2011 racing bike also include the use of more production parts such as fuel injectors, fuel pump and fuel regulator which also had an effect on the fuel injection mappings used in 2011
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