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Pinasco Item number: PN26482040
Pinasco

Engine housing -PINASCO Master 2.0, rotary valve - Vespa PX125, PX150 Elestart (1984-)

PINASCO Master 2.0 replacement engine housing for Vespa PX125 and PX150 (suitable for E-Start)
Rotary valve intake on the engine housing (as ex works Piaggio) - ideal for classic setups
Three-point bearing fixing system on the clutch side bearing seat (components included, bearings not included)
Large sealing surfaces on cylinder base and carburetor inlet - clean, stable design
Important: 125-150 version uses 200 mm intake - requires PX200 crankshaft
890,00 €*
available immediately
Shipping weight 8,95 kg
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PINASCO Master 2.0 engine case - rotary valve - Vespa PX125 and PX150 Elestart (1984-)

The PINASCO Master 2.0 engine case is a high-quality replacement case made of die-cast aluminum for PX125 and PX150, which retains the classic rotary valve intake on the engine case. Perfect if you are looking for a stable, precisely machined engine block as the basis for a stable touring or tuning setup. The 2.0 version also relies on the three-point bearing fixation (Three Locks) on the bearing seat clutch side to significantly alleviate typical problems with bearing and shaft seal seats on powerful engines.

Rotary slide (master) Three-point bearing fixation Large sealing surfaces NU bearing Limal bearing E-starter prepared

Why Master 2.0 (rotary valve)?

Classic intake: rotary valve on the engine housing like Piaggio ex works
Clean base: precise sealing surfaces, lots of material at critical points
2.0 update: three-point bearing fixation for bearing and shaft seal on the clutch side bearing seat
Designed for tuning: Reinforcing ribs and revised bearing for more stability

Technical highlights

Material: die-cast aluminum with a fine surface finish
Sealing surfaces: large and very precisely milled (cylinder base and carburetor inlet)
Limal bearing: large roller bearing in NU design (NU205 25x52x15 mm)
Lubrication: double lubrication hole for the top bearing
Silent rubbers: Ø 44 mm seat, enclosed rubbers stiffer, Piaggio also fits

Three-point bearing fixation: what has been improved in 2.0?

PINASCO addresses typical weak points on the clutch side bearing seat with the three-point bearing fix ation (Three Locks): The system guides the bearing and oil seal seats much more securely and protects them against "wandering" or working out, especially with high clutch forces and powerful engines.

Note: The system components are enclosed, bearings are not included.
Setup tip: Recut and clean threads and always glue stud bolts in place (high-strength screw adhesive).

Compatibility and important notes

State of construction: based on the later PX state (internal shaft seal ring main shaft)
Parts basis: can be used for PX model internals and ignition parts from 1982 onwards, often the better choice from 1984 onwards
Donor: Cosa engine internals fit in principle, but primary is shorter (21/68 instead of 23/65)
Important (125-150 Master): uses the intake dimension of the 200cc engines, therefore PX200 crankshaft absolutely necessary
E-starter: housing is designed for e-starters, use fan cover for e-starter models
Oil hole: no drain hole for gear oil (as on some Piaggio housings)

Assembly instructions from practice

The enclosed fitting bush for the auxiliary shaft must be inserted by yourself.
Cylinder stud bolts are without oversize on one side, therefore glue in the enclosed stud bolts.
When the oil pump gear is fitted, ensure that the cylindrical stud bolts can be screwed in freely.
Installation note: The NU205 bearing on the alternator side is not flush, it protrudes approx. 1 mm towards the crankshaft.

Scope of delivery (Master rotary valve)

Master 2.0 engine housing (rotary valve)
All stud bolts (incl. cylinder stud bolts)
Silent rubbers plus washers
Housing seals
Bushing for auxiliary shaft axle
Three-point bearing fixing components (bearings not included)

Conclusion

The PINASCO Master 2.0 is the right choice if you want to build a solid and precise rotary valve setup on a PX125 or PX150 without compromising on material, sealing surfaces and stability. With the three-point bearing fixation on the bearing seat clutch side, the housing is clearly designed for durable engines that work reliably even with powerful clutches and more power.

OEM numbers (for comparison purposes only)
Pinasco:
26482040
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