The all-new Aprilia RS4 is Aprilia’s first step away from the 2-strokes that made them famous. The RS125 2-stroke will still be sold (in Europe), but the emergence of this new 4-stroke 125 shows Aprilia’s direction for the future.
Everybody knows that 2-stroke engines can produce more power than a comparably sized 4-stroke. The RS125 can be tuned to around 33 horsepower, whilst the RS4 125 can only get to about 25 horsepower with a 180cc kit. The RS4 125 can’t replace the RS125 performance-wise, but it does benefit from a reliable torquey 125cc four-stroke engine that doesn’t need a rebuild every 10,000 miles. The RS4 125 is also more environmentally friendly using less fuel and oil compared to the 2-strokes.
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