Andy has tried to tempt me onto the wacky stuff too.

I'm sure there would be gains but I don't want to have to alter my heads, ign timing, jetting etc etc to make it work properly after its taken my so many years to get where I'm at on pump unleaded.

The F3 gets used on the road too so being able to stop in any old petrol station and fill up makes it handy too.
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If I have to take the carbs off once more...