Join Date: Feb 2016
Location: Sydney, Australia
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They could make a proper supersports with modern tech in low cc with more cylinders, better stock ergos, better suspension and brake packages, better frames etc etc but it will end up costing not that much less than a 600cc supersports.
Then you also have the thing that the only people really buying these smaller cc sportsbikes are countries with graduated licencing/restricted licensing or people who want to learn on smaller cc bikes. Put that all together and then it ends up being a bad idea putting novice riders on basically full blown supersports with less power and maybe a little less weight. Other thing, is that with the graduated licensing schemes they typically limit the power/weight ratio or overall power and not just engine size. The MT07LA (Learner Approved, the 655cc restricted version), makes about 50 something PS but weighs over 180kg. Our R3's make about 30 something PS stock but weigh a bit over 160kg stock.
Smaller cc bikes dont accelerate as hard, dont go as fast and typically arent ridden as hard (on the street at least) as 600cc and up supersports, so they deliberately design them with the capability of the engine and rider in mind.
That being said, its good that Yamaha has an R3 Cup racing competition (in Australia at least), so that people who are willing to spend a bit more coin can get things like ergonomics upgrades, brake upgrades, a bit more engine power, lighter components, etc etc. because there will be people racing these things on the track and will want to squeeze every little bit they can out of the bikes. That aftermarket development then translates into street upgrades.