38.40 mm oversize piston with an L-ring featuring an internal lock and a rectangular piston ring with a flank lock (FS) from DR for all Piaggio mopeds.
You can find the detailed dimensions of the piston, as shown in the technical drawing, in the product details. You can also find information about common piston rings, their clearances, and retaining types in the legend in the images.
The tuning piston is designed for bored and honed cylinders.
The piston kit includes piston pins, piston clips, and piston rings.
Note: 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 the appropriate installation tools, piston pin retainers, and, if necessary, the corresponding cylinder among the accessories.
A quality product from the Italian manufacturer DR Racing Parts.
| Manufacturer | DR Racing Parts |
| Nominal diameter | 38.4 mm |
| Ø outside piston (A) | 38.33 mm |
| Compression height (C) | 26.4 mm |
| Curvature (D) | 3.8 mm |
| Total piston height (E) | 52.3 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | L-ring, Rectangular ring |
| Ø piston pin (B) | 10 mm |
| Piston ring impact | Internal fuse (IS), Flank safety device (FS) |
| Piston ring height | 2 mm, 1.5 mm |
| Weight piston kit | 78 g |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Boxer Grillo |
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DR 38.4 mm cylinder kit 10 mm KoBo | Piaggio Ciao, SI, Bravo, Boxer
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