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
Manufacturer: GPO · Material: Steel · Surface: burnished · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Total length: 130 mm · Number of components: 7 pcs · Width across flats: 10 mm · Width across flats: 17 mm · Area of application: (Dis)assembly tool
EUR 23.80
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 · Number of fixing points: 3 pcs · Ø piston pin (B): 12 mm · Outlet type: clamped · Decompressor: Yes · Camouflaged: No · Area of application: Tuning
EUR 191.30
Athena piston 38.4 mm (10 mm KoBo) | Piaggio Ciao, SI, Bravo, Boxer
Nominal diameter: 38.4 mm · Manufacturer: Athena · Ø outside piston (A): 38.355 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 · Ø piston pin (B): 10 mm · Weight piston kit: 80 g
EUR 68.10
Explore categories from Piston
Moped fans also bought
Starter cable Ø 1.5 mm x 160 cm | Puch Maxi
Ø nipple: 8 mm · Nipple length: 12 mm · Manufacturer: Made in Germany · Area of application: Standard · Material: Steel · Surface: galvanized (blue) · Ø Stranded wire: 1.5 mm · Nipple shape: Barrel (transverse) · Cable length: 1600 mm · Number of components: 1 pcs
EUR 2.85
Luster terminal 3-pole black small (0.1 - 2.5 mm²)
Cable cross-section: 0.1 - 2.5 mm · Number of connections: 6 pcs · Manufacturer: Made in Germany · Area of application: Workshop accessories · Color: black · Material: Brass · Material: Plastic · Material: Steel · Clamping diameter: 3.3 mm · Total length: 18.5 mm · Width: 22 mm · Number of components: 1 pcs · Height: 15.5 mm
EUR 1.70
Continental 2.00 - 2.50 x 17" tube
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 " · Wheel size: 17 " · Tire height [%]: 100 · Old designation: 21 x 2 " · Old designation: 21 x 2.25 " · Old designation: 21 x 2.5 " · Valve type: TR6 car valve
EUR 17.80
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
