New castings that are available for disk
valve housings. The splayed casting at the top is for a 750 engine
so you can use a larger carb such as a weber. The bottom two
castings are for the 500cc engine and the 680cc engine which are the
ones i will be starting with and use a solex carb. I also have a 750
cc carburetor manifold which is not shown. Until I get my
engine on the dynomometer i will not know what difference the
various carbs will make. There is also the option of fitting spacers
between the carbs and the manifold to make the inlet tract longer.
This is something mentioned in old Konig tuning data which i hope to
try at a latter date.
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This photo shows the new engine cases
and new cylinder heads. The cases have no liners and the bores will
be nikociled which is the same as all modern two strokes. The cases
are heat treated and require minimal machining. The ports need hand
finishing before they are sent to have the bores coated. The
cylinder heads will have o rings fitted which will make everything
watertight . There will be 3 o rings , one for each bore and 1 for
round the outside of the case. The o rings are made of viton which
stands extreme temperatures.
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