Yamaha has conceded that its new V4 MotoGP engine is struggling for power after the opening pre-season test of the year at Sepang.<br>The Iwata-based brand was in the headlines for all the wrong seasons in Malaysia, where it finished last among MotoGP’s five manufacturers and more than a second off the outright pace.<br>On the opening day, Yamaha’s star rider Fabio Quartararo broke his finger ...<a class='more' href='https://www.autosport.com/motogp/news/yamaha-more-power-motogp-v4-engine/10795872/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>