Polini racing kit with 47 mm diameter and approx. 75 cc displacement for your Piaggio Ciao, Si, Bravo and Grillo moped / moped with corresponding Polini EVO REED engine housing.
The generously dimensioned, symmetrical overflow ducts and the open boost ports ensure maximum power delivery. The exhaust is attached via a 4-fold bolted exhaust flange plate. Two different sleeves are included in the scope of delivery, which are suitable for exhaust pipes with connection diameters of 22 mm or 27 mm.
The cast iron tuning cylinder is equipped with four stud bolts and an exhaust with two secondary exhaust ports. In combination with the newly developed cylinder head and a piston with two piston rings, it generates impressive compression and power.
The scope of delivery includes all necessary parts such as gaskets, piston pins and exhaust ports. The decompressor is not included in the scope of delivery.
Note: Long-threaded spark plugs are required.
You can find other parts from the Polini EVOLUTION series in the accessories section.
Quality product from the Italian manufacturer Polini.
| Nominal diameter | 47 mm |
| Manufacturer | Polini |
| Material | Gray cast iron |
| Area of application | Tuning, High End |
| Displacement | 75 ccm |
| Crankshaft stroke | 43 mm |
| Ø cylinder neck | 49.8 mm |
| Ø Outlet outside | 22 mm, 27 mm |
| Ø piston pin (B) | 12 mm |
| Hole pattern [mm] | 43 x 52 |
| Hole spacing outlet | 23 mm, 38 mm |
| Number of fixing points | 4 pcs |
| Thread outlet | M5x0.8 (standard thread) |
| Decompressor | Yes |
| Camouflaged | No |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Grillo |
Ratings
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Polini piston 47 mm EVO cylinder (12 mm KoBo) | Piaggio Ciao, SI, Bravo, Boxer, Grillo
Manufacturer: Polini · Nominal diameter: 47 mm · Ø outside piston (A): 46.92 mm · Ø piston pin (B): 12 mm · Compression height (C): 31.6 mm · Curvature (D): 2 mm · Total piston height (E): 55.5 mm · Number of piston rings (F): 2 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.2 mm · Weight piston kit: 101 g
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