I am really going to show my ignorance here, but here goes anyway. I am having a problem with a new YS .63 and posted the question on their support line. Dave got back to me very quickly on the problem but his answer has me in a bit of a dither and he hasn't got back to clarify, so I am asking the question here.

He told me to adjust the valves to .003 mm and the only 2 feeler gauges I have are from an OS kit and they are 0.1 & 0.04. I always adjust my valves with the 0.04 guage and having walked through my last door at school some 40 years ago and not very good with decimals, I am assuming .003 is THINNER than 0.04, am I right ?

I have another question. The impression I get on everything I read is that the valve clearance in these engines INCREASES with a warm engine, this goes against everything I always thought was so in an automotive engine, is this true.