Now there is an intake manifold with which a modern PK XL engine, with three-hole mounting on the intake manifold, can be implanted into an old Primavera or V50 frame.
The connection width at the intake is 34mm outside and is therefore suitable for carburettors with up to 28-30mm cross section (e.g. Keihin PWK, bgm PWK).
Ideal for a powerful but inconspicuous setup based on a rotary vane. Of course these are also much quieter than a diaphragm controlled engine.
We also like to use them as a base for welding around to be able to use even bigger carburettors (e.g. 33mm Keihin).