I had occasion to go to Fraser's Motorcycles today (details in another thread somewhere), and while there I casually asked if I could have a ride on their Aprilia RSV4 demonstrator. Sure, said Neil Fraser, and passed me the keys. As the magazine tests have said, the first impression is the tiny size of the thing. We've got used to litre bikes feeling like 600s, but this one is the size of a 400. It's tiny, and rocking from side to side it feels very light too. It started on the button, and I settled into a beautiful V4 tickover. I clicked it into first (bizarrely, the exhaust note gets louder when you put it into gear), and headed into the Gloucester traffic. It was perfectly well behaved in traffic, and comfortable enough despite its race-orientated ergonomics. And then we got to a set of traffic lights leading onto a dual carriageway, and it was time to see what the loud handle did. Well, it's quite loud, for one thing. If these exhausts pass Euro noise tests then I'm the Archbishop of Canterbury. It's also properly fast, showing 150mph as I changed into 5th and still pulling hard. But there was a roundabout approaching, so I squeezed the brakes...and damn near stopped. The brakes are amazingly powerful, no doubt helped by the light weight. And then I turned into the roundabout and the bike just fell on its ear. Not only is it the size of a 400, it steers like one too. In fact, I never did really get the hang of the steering (in a 20 mile test ride), thrupenny-bit-ing my way round half the corners. The tyres are fairly standard sizes, so it must be something in the geometry. I'm sure I would dial myself into without too much trouble, tho. The quality of the cycle parts is obvious from the saddle. It gives feedback like a race bike, and I found myself thinking "hmm, perhaps a bit more compression damping on the front, and little less preload on the back". These are not the sort of things I normally think on a road bike. But the overwhelming impact of the bike is the noise. It's like riding a 21st century RC30, and you feel like Joey Dunlop in V4 Victory and you belt along between the trees. That alone might make it worth the £15k asking price. Might.