38.4 mm piston with two 1.5 mm rectangular piston rings with flank lock (FS) for Piaggio mopeds / mopeds with the Athena cylinder kits for Piaggio.
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 | Athena |
| Ø outside piston (A) | 38.32 mm |
| Compression height (C) | 26.3 mm |
| Curvature (D) | 3.9 mm |
| Total piston height (E) | 51.83 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Internal fuse (IS) |
| Piston ring height | 1.5 mm |
| Ø piston pin (B) | 12 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
Total length: 130 mm · Manufacturer: GPO · Material: Steel · Surface: burnished · Number of components: 7 pcs · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Area of application: (Dis)assembly tool · Width across flats: 10 mm · Width across flats: 17 mm
CHF 19.90
Athena 38.4 mm cylinder kit without head 12 mm KoBo | Piaggio Ciao, SI, Bravo, Boxer
Nominal diameter: 38.4 mm · Manufacturer: Athena · Material: Aluminum · Surface: sandblasted · Displacement: 50 ccm · Crankshaft stroke: 43 mm · Ø piston pin (B): 12 mm · Outlet type: clamped · Number of fixing points: 3 pcs · Decompressor: Yes · Camouflaged: No · Area of application: Tuning
CHF 159.90
Athena piston 38.4 mm (10 mm KoBo) | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Athena · Nominal diameter: 38.4 mm · Ø outside piston (A): 38.355 mm · Ø piston pin (B): 10 mm · Compression height (C): 26.3 mm · Curvature (D): 3.9 mm · Total piston height (E): 51.85 mm · Number of piston rings (F): 2 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring height: 1.5 mm · Weight piston kit: 80 g
CHF 56.90
Explore categories from Piston
Moped fans also bought
Starter cable Ø 1.5 mm x 160 cm | Puch Maxi
Ø Stranded wire: 1.5 mm · Nipple shape: Barrel (transverse) · Ø nipple: 8 mm · Nipple length: 12 mm · Manufacturer: Made in Germany · Material: Steel · Surface: galvanized (blue) · Number of components: 1 pcs · Cable length: 1600 mm · Area of application: Standard
CHF 2.40
Luster terminal 3-pole black small (0.1 - 2.5 mm²)
Cable cross-section: 0.1 - 2.5 mm · Number of connections: 6 pcs · Total length: 18.5 mm · Manufacturer: Made in Germany · Material: Brass · Material: Plastic · Material: Steel · Color: black · Number of components: 1 pcs · Width: 22 mm · Height: 15.5 mm · Clamping diameter: 3.3 mm · Area of application: Workshop accessories
CHF 1.40
Continental 2.00 - 2.50 x 17" tube
Valve type: TR6 car valve · Manufacturer: Continental · Tire width: 2 - 2.5 " · Tire width: 2.25 - 2.5 " · Tire width [mm]: 50.8 - 63.5 · Width: 2 " · Width: 2 1/4 " · Width: 2 1/2 " · Tire height [%]: 100 · Old designation: 21 x 2 " · Old designation: 21 x 2.25 " · Old designation: 21 x 2.5 " · Wheel size: 17 "
CHF 14.90
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
