Sorry all if it sounds mad what do most run they bikes on just normal unleaded or Supper unleaded

All of my bikes have been happy on normal unleaded - even supermarket stuff - with the exception of my MV Agusta. She prefers super unleaded and splutters on supermarket fuel.

NC30 was desgined for 91 octane unleaded fuel.

Super unleaded will offer no benefits, ignore the touts of improved cleaning etc, its mostly a marketing hype, modern engines run very clean as it is.. stripped plenty of high mile vfrs that have been spotless inside that have never seen anything other than the cheapest fuel.

Some brands of high octance fuel use a higher ethanol content to achieve the higher octane rating, ethanol can damage older rubber parts and plastic fuel filters too so I wouldnt recommend it.

The higher octance rating just means you can compress the fuel more before it spontaneously ignites, this is useful if you have high compression / turbo etc but the nc30 only needs 91 to run correctly on it's setup.

UK unleaded is 95 so perfectly adequate.

Super unleaded i think was 5% ethanol up to january this year now its 10% as normal unleaded marked as E5 or E10 at pumps .