Thought I'd try V power.

[VNA]

The KV6 has knock sensors but apparently the ECU will only compensate for lower RON fuels to avoid pinking and therefore won't make the most out of the likes of V-Power - this could go a way to explaining why remapping the ECU gets recommended

Nope becuase an engine either needs it or it does not.  High octane petrol contains the same energy as low octane fuel.

Anyway according to the interweb.  My GEN1 Fazer thou has a high compression engine, however as it is a small capacity engine that runs at 'normal' temperatures it won't 'knock' or 'pink' on 92RON, so therefore it does not require a higher octane. 

And personally I'm not minded to mess with Mr Yamaha's timing.