The Yamaha YZR-M1 50th Anniversary Valencia Edition No. 46 features a striking white body with red block pattern. In the 1970s this color scheme was referred to as chain-block pattern. From the late 1970s onward, this color scheme was referred to as a strobe line pattern and became infamous with the power of Yamaha racing. After the 4th year in the MotoGP, the YZR-M1 2005 model underwent drastic improvement to be considered a fully new model. The redesigned YZR-M1 featured a 4-stroke in-line 4 cylinder 990cc engine to improve speed and fuel efficiency. The fuel tank was lowered and the rear shocks attached directly to the crankcase to ensure optimum weight concentration in the center of the bike. Other improvements included shock absorbing capabilities, refined brakes and torque control systems. After the modifications to the YZR-M1 the Yamaha team went on toe claim the Manufacturers and Riders Championship.