Piston ring for the 45 mm cylinder kit from Athena, suitable for your moped / moped with Sachs 504, 505, 535 engine.
This piston ring can be used for Hercules Prima M, 2, 3, 4, 5 and Optima models, among others, provided you have fitted the racing cylinder mentioned above.
You can find the matching tuning cylinder and piston in the accessories section.
Quality product from the Italian manufacturer Athena.
| Nominal diameter | 45 mm |
| Manufacturer | Athena |
| Diameter | 45 mm |
| Height | 1.5 mm |
| Piston ring impact | Internal fuse (IS) |
| Sachs | 504 (without pedal shaft) 505 (with pedal shaft) - 1A (AT) , 2A (HG) , 2B (HG) 508 - 1 A 535 |
| Hercules | Great - 2 , 3 , 4 , 5 , Optima |
Ratings
Accessories & related products
Athena 45 mm cylinder kit incl. mounting parts | Sachs (504), 505, 508
Nominal diameter: 45 mm · Manufacturer: Athena · Material: Aluminum · Camouflaged: No · Area of application: Tuning · Surface: sandblasted · Crankshaft stroke: 44 mm · Ø cylinder neck: 51.7 mm · Ø Outlet outside: 25.9 mm · Ø outlet inside: 19.5 mm · Ø Inlet inside: 14.3 mm · Hole spacing inlet: 31.5 mm · Inlet window: 23.4 x 12.6 · Thread inlet: M6x1 (standard thread) · Hole pattern [mm]: 56 (61) x 56 · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Outlet type: clamped · Outlet type: straight · Hole spacing outlet: 50 mm · Thread outlet: M8x1.25 (standard thread) · Decompressor: M10x1.5
EUR 369.10
Athena piston 45 mm #A | Sachs 504, 505
Nominal diameter: 45 mm · Manufacturer: Athena · Ø outside piston (A): 44.92 mm · Compression height (C): 28.2 mm · Total piston height (E): 45.2 mm · Number of piston rings (F): 1 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.5 mm · Ø piston pin (B): 12 mm · Tolerance group: A · Weight piston kit: 98 g
EUR 86.00
Explore categories from Piston
Moped fans also bought
GPO mushroom air filter grille, Bing SRE (Ø=20 mm)
Ø outside: 61 mm · Total length: 113 mm · Manufacturer: GPO · Material: Metal · Material: Rubber · Color: Chrome · Color: black · Filter type: Grille · Camouflaged: No · Ø Internal connection: 20 mm · Length rubber part: 63.5 mm · Length of filter section: 49 mm · Area of application: Tuning · Mounting type: Bride · Mounting type: Plug connection clamped
EUR 15.90
GPO gasket set | Puch E50
Manufacturer: GPO · Material: Aluminum · Material: Fiber · Material: Sealing carton · Material: Sealing paper · Area of application: Standard · Ø outlet inside: 19.9 mm · Hole spacing inlet: 32 - 38 mm · Hole pattern [mm]: 44 x 44 · Number of components: 7 pcs · Hole spacing outlet: 42 mm · Decompressor: Yes
EUR 12.20
Hot 
Fuel tap horizontal M12x1 (with union nut) outgoing at the bottom
Possible lever positions: open / closed / reserve · Material lever: Metal · Filter type: Plastic net · Installation direction: horizontal / horizontal · Outlet direction: below · Mounting type: Union nut · Spare tube shape: curved · Thread type: MF12x1 (fine pitch thread) · Ø fuel hose connection: 6 mm · Reserve level: 70 mm
EUR 12.20
Nut M12x1 x 10 SW19 Wheel nut Inox
Material: Chrome steel (colloquially known as stainless steel) · Area of application: Standard · Surface: blank · Nut type: Hexagon nut 1D · Drive: External hexagon · Height: 10 mm · Thread type: MF12x1 (fine pitch thread) · Strength class: A2-70 · Width across flats: 19 mm
EUR 4.80
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
