Racing cylinder of the Athena brand for Sachs 504 (with adaptations), 505, 508 & 535 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:
- Ø internal intake manifold: 15 mm
- Connection diameter of 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
The intake manifold and the exhaust flange are included in the scope of delivery.
Note:
Plugs with long thread must be used.
The following modifications must be made to the cylinder on Swiss 504 engines (42 mm stroke):
- Adjust the 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.
- On models with an external clutch lever, the intake manifold must be extended, otherwise the carburettor may come into contact with the clutch lever.
It is well known that the Athena exhaust flange included in the cylinder set can only be fitted with laborious modifications due to incorrect holes and a missing seal. The swiing® exhaust adapter is supplied with a gasket and the appropriate countersunk screws and solves this problem without any adjustment work. Please note the installation direction when assembling. The piston is inserted with the arrow pointing towards the outlet on the exhaust side.
| Surface | sandblasted |
| Manufacturer | Athena |
| Number of fixing points | 4 pcs |
| Material | Aluminum |
| Crankshaft stroke | 44 mm |
| Nominal diameter | 45 mm |
| Ø cylinder neck | 51.7 mm |
| Ø Outlet outside | 25.9 mm |
| Camouflaged | No |
| Ø Inlet inside | 14.3 mm |
| Inlet window | 23.4 x 12.6 |
| Ø outlet inside | 19.5 mm |
| Thread inlet | M6x1 (standard thread) |
| Ø piston pin (B) | 12 mm |
| Hole spacing outlet | 50 mm |
| Hole pattern [mm] | 56 (61) x 56 |
| Hole spacing inlet | 31.5 mm |
| Outlet type | straight, clamped |
| Thread outlet | M8x1.25 (standard thread) |
| Decompressor | M10x1.5 |
| Area of application | Tuning |
| Sachs | 505 (with pedal shaft) - 1A (AT) , 2A (HG) , 2B (HG) 508 - 1 A 535 |
| Hercules | Great - 2 , 3 , 4 , 5 , Optima |
Ratings
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