Pinasco “EVOTEN BIG BORE” cylinder with a 46 mm bore and 71 ccm displacement for your Piaggio Ciao, Si, Bravo, Boxer, or Grillo moped.
The completely redesigned 46 mm cylinder from Pinasco now comes with a 6-channel layout and a cylinder head secured with five bolts, engineered to withstand the toughest conditions.
Various racing exhausts can be mounted to the included exhaust flange, which has an outer connection diameter of 22.5 mm.
The cylinder head is installed without a gasket. To ensure an optimal seal, it is therefore essential to strictly adhere to the tightening torque of 10 Nm for the M6 screws and 14 Nm for the M7 studs.
The following parts are included in the delivery:
- Additional screws for the cylinder head
- Decompression valve (actuator not included)
- Empty cylinder head
- Cylinder and accessories
- Piston with L-ring, square ring, and Ø 12 mm piston pin (axe 12)
- Various gaskets for the cylinder base
- Installation instructions in Italian
High-quality cast aluminum and a durable Nikasil coating characterize this high-end tuning cylinder.
The cylinder kit delivers maximum power in the mid- to high-rpm range. We recommend using the racing cylinder in combination with a variator drive.
Installation on an original engine case is only possible with minor modifications. The cylinder kit can be mounted on the well-known Pinasco, Polini, and Malossi racing cases without any modifications.
Note: If the cylinder kit is installed on a Piaggio Ciao, the cooling fins on the right side must be sanded down. However, due to the cutout for the Ciao’s cable channel, the mounting hook on the head for the decompression cable is also missing. As a result, the cylinder head is only suitable to a limited extent for newer-generation Piaggio Si, Bravo, or Grillo models. This can be resolved by routing the decompression cable to the cylinder head from the front, as is done on the Ciao or Boxer. Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
You can find corresponding components—such as racing casings, racing crankshafts, racing variators, etc.—in the accessories section.
Manufactured by the Italian brand Pinasco.
| Nominal diameter | 46 mm |
| Manufacturer | Pinasco |
| Material | Aluminum |
| Camouflaged | No |
| Surface | varnished |
| Displacement | 71 ccm |
| Crankshaft stroke | 43 mm |
| Ø cylinder neck | 50 mm |
| Ø Outlet outside | 22.5 mm |
| Ø outlet inside | 18.5 mm |
| Hole pattern [mm] | 55 x 34 |
| Number of fixing points | 3 pcs |
| Ø piston pin (B) | 12 mm |
| Hole spacing outlet | 48 mm |
| Outlet type | slanted, clamped |
| Thread outlet | M6x1 (standard thread) |
| Decompressor | Yes |
| Area of application | Tuning |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Boxer Grillo |
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