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How can the Dommi inlets and exhausts be distinguished reliably? I have seen elsewhere that the exhausts are non-magnetic. In my box of bits I have some which are completely non-magnetic valves (stems and heads) and some which are weakly magnetic.
Steve
Absolutely right Steve. Ex…
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On most of the post 1960 h…
On most of the post 1960 heads the inlet valves have fully dished tops whereas the exhausts items have a raised ring (doughnut shape) of metal on the top face. The inlet valves also usually have larger diameterheads.
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Agreed. The post 1960 inle…
Agreed. The post 1960 inlet valves had a bigger head diameter than the exhaust valves but the earlier heads had same-sized inlets and exhausts. Funnily enough, BSA A7 valves are identical to early Domi ones except for the collets.
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Absolutely right Steve. Exhaust valves are non-magnetic but inlets are. You should be able to use exhaust valves as inlets (assuming they are dimensionally identical) but not vice versa.
Gordon.