The Ninja 650R will take it in the first few hundred feet, as it's geared lower and has more torque from a lower RPM pushing less total weight. If the rider knows what he's doing, he'll hold that lead for quite a while. As the speeds start hitting triple-digits, the Kat will come into's it's prime and the 650R will be running out of steam; the Kat will come past the 650 around 105-120, and then leave the Ninja 650R behind.
In a curvy section, it'll be down strictly to a combination of who is the better rider and who is more comfortable on their bike. The 650R is narrower, lighter, carries it's weight lower, and has the torque curve to be a better curvy-road blaster, but someone who just got their ride often doesn't have the skill-set to exploit that advantage.
Cheers,
=-= The CyberPoet
In a curvy section, it'll be down strictly to a combination of who is the better rider and who is more comfortable on their bike. The 650R is narrower, lighter, carries it's weight lower, and has the torque curve to be a better curvy-road blaster, but someone who just got their ride often doesn't have the skill-set to exploit that advantage.
Cheers,
=-= The CyberPoet
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