It was disguised Guinness the stronger alcohol with up to 80% Nitro was used in my motorcycle them old Triumph engines took a lot of hammer.Hi Windy, yes, that's what "ignited my interest"!
Richard , it was probably one of paraffin, one of water, and one of vodka, to steady the nerves!
K2
If this virus lockdown eases there are many speed and record attempts at Elvington this year a photo of a record attempt Triumph based bike I laid on at Elvington a couple of years ago.
Not much original, home made crankshaft, barrels and much more the previous version was on a TV program about UK record attempts at Bonneville