I have never known the clearance on a Villiers piston/cylinder i.e. what size piston for what size bore - if its always the same relationship , which I assume ,what is it .
Richard without looking in the manual , but of the top of my head its huge like 20 thou or there abouts , the lads in the engine place copyed the page for future referance .
running in on the Villiers is 16 to 1 , but what I run on daily as around 20 to 1 , for oil its a gallon(5ltr) of cheep stuff and mix my own , usualy in the spare can - give it a good shake .
had lots of bother with self mix oil's in the passed , with seisure's .
lets hope Paul has the sounds of the seisure locked in his head - just in case . It happens in seconds , for me its clutch - keys off - accelerator pedal hard to the floor as quck as that .
O' the joys of 2 stroking
(not forgetting 4 stroking or even 8 !!!)