I've used Castrol 10W50 for the last 5k kms And yes, it feels rougher. And that's because of the oil being thicker, takes longer to warm up and reach everywhere. It's smoother on low revs, but rougher on higher revs, again, due to the thickness of the oil. But ride it for a longer distance, and the oil makes a world of difference after a 100kms continous ride! The engine barely feels stressed at all!
The motul 300v is an oil that is for high revving multicylinder bikes, and very thick, you are actually better off using 7100 in the CBR! The 300v isnt bad, don't get me wrong, but try the 7100 and you will see the difference and understand what I'm saying!
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can't resist that! i see it often doing above 11000rpm! XD just love revving my sweet ride! B)

ripped him thrice during drag

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