OH, APRILIA. The RSV4 is, without doubt, a stunning bike. With multiple WSB titles after its name, an incredible V4 engine and some up-to-the-minute electronics it really deserves to be far more successful in terms of sales. A regular winner of magazine group tests, the RSV4 tends to stumble when it comes to persuading buyers to part with their cash. And the RF version is a lot of cash, too - £20,002. It’s a brilliant bike, no mistake. Aside from the lack of customer confidence – which is perhaps unwarranted – Aprilia would be selling tons of them.