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Engine case with diaphragm intake, compatible with your Vespa P 200E, PX 200, and PX 200 Lusso scooters.
This completely redesigned housing is designed to replace the original Piaggio engine housing and remains compatible with original Vespa components. Instead of the classic rotary valve inlet, this engine block uses a flat diaphragm system. This helps resolve issues caused by worn intake sealing surfaces and allows for the installation of a racing diaphragm block with a 28/30 mm carburetor. The standard SI carburetor can still be mounted on the housing, including the version with separate lubrication.
The crankcase halves are numbered in pairs and machined together to ensure that the bearings and sealing surfaces fit together perfectly. The flow patterns of the crankcase and overflow ports have been optimized using CFD simulation. The swingarm, the transmission area, the shock absorber mount, and the cylinder base have been reinforced, creating a stable foundation for powerful street engines as well as racing setups.
On the clutch side, a ground steel flange supports the bearing; this design also prevents the shaft seal (commonly known as a Simmerring) from migrating out of place. On the ignition side, a larger bearing measuring 25x52x15 mm is used. M8 hex head screws replace the traditional M7 through-bolts, making the housing assembly stiffer. The motor housing is made of a heat-treated aluminum alloy (Al Si10 Mg T6) and is designed to accommodate an electric starter. The offset gear oil filler neck increases the oil capacity and improves lubrication within the gearbox.
The rubber mounts are pre-installed. In addition to the two housing halves, the package includes all small parts required for assembly. The shaft seals and bearings are also included.
You can find the matching clutch cover and cylinders in the accessories section.
A quality product from the Italian manufacturer Polini.
| Total length | 420 mm |
| Width | 320 mm |
| Height | 345 mm |
| Manufacturer | Polini |
| Material | Cast aluminum |
| Ignition type | Electronic |
| Vespa | Vespa PX, T5, Cosa - P200E · VSX1T · 1977–1984 (Ignition Switch on Steering Head) , PX200 · VSX1T · 1984–1993 Lusso / Arcobaleno , PX200 · VSX1T · 1993–1996 Classic , PX200 · VSX1T · 1997–1999 (Disc) |
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Polini crankshaft "Racing" 57 mm | Vespa PX200, P200, Rally 200, Cosa 200
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Polini crankshaft "Racing" 60 mm long-stroke | Vespa PX200, P200, Rally 200, Cosa 200
Manufacturer: Polini · Material: Steel · Cheek type: standard · Crankshaft stroke: 60 mm · Connecting rod length center-center: 110 mm · Total length of crankpin on clutch side: 58.8 mm · Total length crankpin ignition side: 77.7 mm · Ø crank webs: 97.9 mm · Ø piston pin (B): 16 mm · Ø Connecting rod eye: 20 mm · Ø Bearing seat (clutch side): 25 mm · Ø Bearing seat (ignition side): 25 mm · Thread type: MF12x1.25 (fine pitch thread) · Thread type: MF12x1.5 (fine pitch thread) · Thread length: 14.5 mm · Thread length: 15.5 mm · Dimension needle bearing: 16x20x20 · Wide crank webs: 39 mm · Control time according to O.T: 5 ° · Control time according to O.T: 138 ° · Area of application: Racing
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Malossi 68.5 mm Cylinder Kit "Sport MK II 210" | Vespa P, PX, Cosa, Rally
Manufacturer: Malossi · Material: Aluminum · Displacement: 210 ccm · Crankshaft stroke: 57 mm · Ø cylinder neck: 73.2 mm · Ø Outlet outside: 46 mm · Ø outlet inside: 37.8 mm · Number of fixing points: 4 pcs · Ø piston pin (B): 16 mm · Outlet type: straight · Hole spacing outlet: 58 mm · Camouflaged: No · Area of application: Tuning
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