One of the latest innovation within the Brazilian flexible-fuel technology is the development of flex-fuel motorcycles. The first flex-fuel motorcycle was launched by Honda in March 2009, the CG 150 Titan Mix. In September 2009, Honda launched a second flexible-fuel motorcycle, the on-off-road NXR 150 Bros Mix. By December 2012 the five available models of flexible-fuel motorcycles from Honda and Yamaha reached a cumulative production of 2,291,072 units, representing 31.8% of all motorcycles manufactured in Brazil since 2009, and 48.2% of motorcycle production in 2012. Flexible-fuel motorcycle production passed the 3 million-unit milestone in October 2013. The 4 million mark was reached in March 2015.