Racing cylinder of the Athena brand for Sachs 504 (with adaptations), 505 & 508 engines, which were installed on Hercules Prima M, 2, 3, 4, 5 and Optima mopeds / mopeds, among others.
Thanks to the large intake, overflow and exhaust, this tuning cylinder provides a considerable increase in performance.
Technical data cylinder:
- Intake port diameter: 19 mm and 24 mm
- Ø inner exhaust flange: 20 mm
- Ø connection exhaust flange: 25.7 mm
- Distance stud bolt exhaust flange: 50 mm
- Ø Thread exhaust flange: M8
- Ø Cylinder neck: 51.6 mm
- Stroke: 44 mm
- Bore: 48.0 mm
- Thread for decompressor: M10 x 1.5 mm
The intake manifold with diaphragm system for Dell'Orto SHA or PHBG carburetor and exhaust flange is included in the scope of delivery.
Notes:
Plugs with long thread must be used.
For Swiss 504 engines (42 mm stroke), the following modifications must be made to the cylinder:
- Adjust the cylinder base and gasket as shown in Figure 6 .
- The cylinder base must be turned off so that the compression is adjusted again due to the shorter stroke, we recommend setting a crushing edge of 0.8 - 1.0 mm.
- On models with an external clutch lever, the intake must be extended, otherwise the carburetor may come into contact with the clutch lever.
As experience has shown that the steel diaphragm plates supplied can break, we recommend replacing them with carbonite diaphragm plates. You can find these and other suitable parts in the accessories section.
Details
| Manufacturer | Athena |
| Material | Aluminum |
| Surface | sandblasted |
| Area of application | Tuning |
| Crankshaft stroke | 44 mm |
| Ø piston pin (B) | 12 mm |
| Nominal diameter | 48 mm |
| Ø cylinder neck | 51.8 mm |
| Ø Outlet outside | 26 mm |
| Ø outlet inside | 19.4 mm |
| Ø Inlet inside | 14.7 mm, 17.8 mm |
| Inlet window | 31.9 x 36.2 |
| Thread inlet | M5x0.8 (standard thread) |
| Hole spacing inlet | 32.5 mm |
| Number of fixing points | 4 pcs |
| Hole spacing outlet | 50 mm |
| Outlet type | straight, clamped |
| Thread outlet | M8x1.25 (standard thread) |
| Hole pattern [mm] | 56/60 x 56 |
| Decompressor | M10x1.5 |
| Camouflaged | No |
Suitable for the following models
| Sachs | 505 (mit Tretwelle) - 1A (AT), 2 A (HG) 508 - 1 A |
| Hercules | Prima - 2, 3, 4, 5, Optima |
Accessories & related products
Athena piston 48 mm #B | Sachs 504 / 505
Manufacturer: Athena · Nominal diameter: 48 mm · Ø outside piston (A): 47.96 mm · Compression height (C): 30.12 mm · Curvature (D): 1.94 mm · Total piston height (E): 59 mm · Number of piston rings (F): 1 pcs · Piston ring impact: Internal fuse (IS) · Piston ring mold: Rectangular ring · Ø piston pin (B): 12 mm · Piston ring height: 1.5 mm · Tolerance group: B · Piston weight: 123 g
CHF 68.70
Athena piston 48 mm #A | Sachs 504 / 505
Manufacturer: Athena · Ø outside piston (A): 47.94 mm · Compression height (C): 30.2 mm · Curvature (D): 1.94 mm · Nominal diameter: 48 mm · Total piston height (E): 59.05 mm · Number of piston rings (F): 1 pcs · Piston ring impact: Internal fuse (IS) · Piston ring mold: Rectangular ring · Ø piston pin (B): 12 mm · Piston ring height: 1.5 mm · Tolerance group: A · Piston weight: 123 g
CHF 68.70
NGK B9ES spark plug long thread
Manufacturer: NGK · Candle designation: B9ES · Candle thread type: long · Spark plug socket: M4 · Spark plug socket: SAE · Thread type: MF14x1.25 (fine pitch thread) · Suppressed: No · Width across flats SW: 21 mm · Area of application: Original · Area of application: Standard
CHF 6.50
Moped fans like you also bought:
Motorex engine oil (gear oil) manual 450 ml
Temperature resistance (min.): -30 - 220 °C · Manufacturer: Motorex · Oil type: GL4 · Viscosity (SAE): 80W · Contents [ml]: 450 ml · Gearbox type: Foot control · Gearbox type: Manual gearshift · Area of application: Gearbox lubrication with clutch
CHF 9.90
CHF 22.00/l
Petrol filter large 6 / 8 mm orange
Material: Paper · Material: Plastic · Color: transparent · Color: white · Color: yellow · Filter type: Filter paper · demountable: No · Ø inside: 4.2 mm · Ø outside: 38 mm · Total length: 49 mm · Total length: 108 mm · Ø fuel hose connection: 6 mm · Ø fuel hose connection: 8 mm
CHF 4.90
NGK B7ES spark plug long thread
Manufacturer: NGK · Candle designation: B7ES · Candle thread type: long · Spark plug socket: M4 · Spark plug socket: SAE · Thread type: MF14x1.25 (fine pitch thread) · Suppressed: No · Width across flats SW: 21 mm · Area of application: Performance · Area of application: Racing · Area of application: Tuning
CHF 6.50
Collection only possible with online purchase and appointment.
