Quote:
Originally Posted by Blue_SV650S
My bike race engine would only run high octane fuel (still pump fuel - but 'super' only) ... I evidently bought a bad batch once and within 1 days use (~20 mins) it had burnt the valves out ... as I had bought the fuel (Optimax) at great expense from a petrol station the day before, so I can only put that down to it having sat in the petrol stations tank going 'stale' before I bought it ... lower octane ... rogered valves ... big repair bill (had only just had the engine rebuilt!!) and loss of power for the weekend affecting my results .. 
.. |
There are only about 5 or 6 BP stations in the UK that supply extra high octane super unleaded fuel - I can't remember how high the grade is. We always use it in Danny's ZX10R race bike because the rules allow for any freely available pump fuel and also because we have one of the suppliers just down the road in Milton Keynes. It ain't cheap, but Danny notices the difference in power if we have to use normal super-unleaded.