Built to Litchfield’s requirements by Cosworth Inc, the US arm of the world-renowned engine builders, it’s a magnificent motor, featuring Cosworth’s own forged pistons and conrods ...

The same 648cc parallel twin SOHC 4-valve air-cooled motor that I rode back in 2018 on the Interceptor and GT650 launch in northern California, pretty much. The 2025 version has been fettled for ...