Honda checking if engine upgrade can run in Japan

The Japanese manufacturer introduced its latest specification in Friday practice at Sochi to the delight of its Toro Rosso team, but reverted to an older spec for the rest of the weekend. This was a precautionary measure after Honda discovered some "unsuitable behaviour" when the engine was run on track. It is confident it will be able to re-introduce the upgraded engine, penalty-free, for ... ... Keep reading