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No reason for me to echo what all others have said about it being the better rider, that is obviously true. Out of curiosity here are some figures.

YBR 10:1 Compression

YZF 11.2:1 Compression

YBR 7.5kW @ 7800

YZF 11kW @ 9000

YBR 9.6NM @ 6000

YZF 12.2NM @ 8000

Can see here the YZF is slightly more powerful, but will need to be worked harder to keep the revs higher for the performance.

YBR 5speed

YZF 6speed

This will help with keeping it revvy, as gearing will be short, but may be a hassle town riding.

Caster and Trail both are shorter on the YZF giving quicker steering, and wider tyres giving it higher lean angles, and is likely to also have larger ground clearance for faster corner speeds.

YBR is 125kg

YZF is 138kg

So you already have 13kg weight advantage.

All being equal the YZF-125R will probably be slightly quicker, but biggest difference will be the handling, unfortunately it is down to the skill of the rider to extract the most from a machines handling.

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