Air cleaner design to prevent the filter being bypassed, is a constant challenge it seems. A whole generation of Intek V-twins had problems in that area.

On the subject of tappet adjustment temperature:
[Linked Image]

(On page 2-12, Periodic Maintenance.)

I can't actually remember a car engine on which the tappets were adjusted hot, since the Austin/Morris engines of the 1950s. The whole concept was crazy: the results you got depended heavily on how long it took to to adjust that many tappets. Imagine doing the same thing on a V8.