The ST4S is an extreme evolution of the ST2 and ST4 experience. Developed from the same basic project, it uses high-quality components and fittings, in line with the superior performance of its Desmoquattro twin-cylinder 996 engine in a special version characterised by high peak torque and consistently high torque output throughout the entire rpm range. The ST4S has set the standard for the Grand Touring bike market.
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