re: radial valve heads (was pushrods)

[Keith Walker <100662.3423@domain.elided>]

>>The only people I can think of who have radial valve
>>heads are Honda and Aprilia and both of those are on single
>>cylinder engines with twin cams
>
>Can anyone supply a link to cutaway drawings of either of these
>engines?  I'd really like to see how it's done.

Hi

Probably have a cutaway somewhere, but not sure where.

The Aprilia engine used a 5 valve head. The cams are skew
ground for 4 of the valves. The 5th valve (the middle inlet valve)
is run off a rocker. The biggest problem was that with so much
hardware in the head the cooling wasnt as efficient as it
could be

All the best

Keith
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