The parallel twin has been such a popular engine layout for middleweights in recent years that few people were surprised when Aprilia launched its new family in 2021. But the RS660’s introduction represented a major change of direction for the Noale firm.
Aprilia’s previous mid-capacity models were V-twins, including the naked Shiver and supermoto-style Dorsoduro. Now the firm was abandoning that tradition – a decision doubtless made easier by the fact that those
