38.40 mm oversize piston with an L-shaped piston ring with internal circlip (IS) and a rectangular piston ring with flank circlip (FS) for all Piaggio mopeds / mopeds.
The detailed dimensions of the piston according to the technical drawing can be found in the details. You can also find out about the relevant piston rings, their stems and locking types on the legend in the pictures.
| Nominal diameter | 38.4 mm |
| Manufacturer | Olympia |
| Ø outside piston (A) | 38.34 mm |
| Compression height (C) | 26.4 mm |
| Curvature (D) | 3.6 mm |
| Total piston height (E) | 51.9 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | L-ring, Rectangular ring |
| Piston ring impact | Internal fuse (IS), Flank safety device (FS) |
| Ø piston pin (B) | 10 mm |
| Weight piston kit | 76 g |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Boxer Grillo |
Ratings
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Material: Steel · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Surface: burnished · Width across flats: 10 mm · Width across flats: 17 mm · Total length: 130 mm · Number of components: 7 pcs · Area of application: (Dis)assembly tool
EUR 24.00
EUR 21.60
Not so nice 
Olympia 38.4 mm cylinder kit 10 mm KoBo | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Olympia · Material: Gray cast iron · Displacement: 50 ccm · Surface: varnished · Crankshaft stroke: 43 mm · Ø piston pin (B): 10 mm · Nominal diameter: 38.4 mm · Ø cylinder neck: 46 mm · Ø Outlet outside: 22.4 mm · Number of fixing points: 3 pcs · Ø outlet inside: 17.6 mm · Outlet type: clamped · Area of application: Tuning
EUR 160.30
Explore categories from Piston
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
