Hi nikroc,

I went out and measured the gap. Turns out I'd mis judged the max gap. When I put the feeler gauge in, I can fit a 0.7mm feeler in (which is still ~ 5 times the spec of 0.16-0.20 mm). See pic here.

The problem is, the whole upper part appears loose and moves up and down. It is moving enough that the top tips are currently resting on the valves. So, even if I turned the screws to create a gap, would it mean anything as the gap of 0.7mm will still be there due to the looseness? Here is a picture of the tips resting on the valves.

A bit baffled. Any thoughts would be greatly appreciated.

[edit: Some internet searching tells me that the rocker arm is expected to have some play. The play on the intake side was definitely much less compared to what I see on the exhaust side.]