Racing cylinder of the Athena brand for Sachs 504 (with adaptations), 505 & 508 engines, which were installed on Hercules mopeds / mopeds, among others.
Thanks to the large intake, overflow and exhaust, this tuning cylinder provides a significant increase in performance.
The intake manifold and exhaust flange are included in the scope of delivery.
Plugs with a long thread must be used.
Technical data cylinder:
- Ø inside intake manifold: 15 mm
- Connection diameter intake manifold: 20 mm
- Ø inside 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: 45.0 mm
- Thread for decompressor: M10 x 1.5 mm
Attention: For Swiss 504 engines (42 mm stroke), the following modifications must be made to the cylinder:
- Adjust cylinder base and gasket as shown in Figure 5.
- 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.
- In the model with an external clutch lever, the intake must be extended, otherwise the carburettor may come into contact with the clutch lever.
Quality product from the Italian manufacturer Athena.
Details
| Nominal diameter | 45 mm |
| Manufacturer | Athena |
| Material | Aluminum |
| Crankshaft stroke | 44 mm |
| Surface | sandblasted |
| Ø cylinder neck | 51.7 mm |
| Ø Outlet outside | 25.9 mm |
| Ø outlet inside | 19.5 mm |
| Ø Inlet inside | 14.3 mm |
| Inlet window | 23.4 x 12.6 |
| Thread inlet | M6x1 (standard thread) |
| Hole spacing inlet | 31.5 mm |
| Ø piston pin (B) | 12 mm |
| Outlet type | straight, clamped |
| Hole spacing outlet | 50 mm |
| Thread outlet | M8x1.25 (standard thread) |
| Hole pattern [mm] | 56 (61) x 56 |
| Number of fixing points | 4 pcs |
| Decompressor | M10x1.5 |
| Camouflaged | No |
| Area of application | Tuning |
Suitable for the following models
| Sachs | 505 (mit Tretwelle) - 1A (AT), 2 A (HG) 508 - 1 A |
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