This is the manifold to fit the Dellorto PHBH 28mm carburettor OR The Later VHST28mm Dellorto carb. Will not fit the 34mm Dellorto VHSB carburettor, this has a opening of 44mm. The 28mm carb is the standard size carb that is fitted most of the Aprilia RS125 bikes, the size of the opening in the manifold is around 34mm.
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