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Aprilia RS4 125: Teen dream goes four-stroke

By Liam Marsden -

First rides & tests

 10 June 2011 15:00

Walking up to the Aprilia RS4 125 you’d be forgiven for mistaking it for its bigger brother – the 1000cc V4 RSV4R. The styling is exactly like the World Superbike championship winning machine, only when you stop for a closer look do you notice it is in fact, a 125.

Sitting on the bike you’d still struggle to guess it was a 125 making only 15bhp, with a seat height of 820mm it doesn’t feel like a weedy little bike – in fact it’s only 25mm lower than the seat height on the RSV4R.

Pulling away a good twist of the wrist is needed to get the new four-valve four-stroke engine spinning and keep up the momentum, compared to other 125s the RS4 needs to be revved, and ideally kept above 8000rpm.

The test bikes were shod with sticky Pirelli Super Corsa SC1s, instead of the OE Bogart MC25s, with a 150/70 section rear as oppose to the standard 130/70 section the bike will come with. The SC1s never ran out of grip and the RS4 handled well around the 1.7 mile Vairano handling circuit.

To read the full test pick up a copy of this week's MCN, out now.