Failing to Plan is Planning to Fail - so whislt I'm messing with my front wheel in the daytime - my mind started to wander into valve clearances come bedtime.
I've looked in the manual - it gives Inlet & Exhuast for a 400 engine as 0.05mm or 0.002 ". I haven't spotted the words Hot or Cold engine anywhere.
My feeler gauges - I have imperial & metric are probably 50 & 30 years old respectively - I can't read any numbers due to deterioration over the decades except on the never used thick ones - note to self buy replacements.
I thought okay I understand 0.002" it's two thousandths of an inch in words - I'm used to bigger gaps like 12 thousandths on a car. So 0.002" is the thickness of some medium grade paper.
Stupidly I then said to myself naaah it's got to be 20 thou surely - then I looked at the decimal and though no 20 thou is actualy 2 hundreths of an inch.
At 0.002" I'm amazed you can hear a tappet rattle at all - its close to naff all as gaps go.
Does this look suitable or will it be too wide ?
https://www.ebay.co.uk/itm/114686642402?hash=item1ab3db48e2:g:UH8AAOSwUylgKybE