40 mm racing cylinder suitable for the following mopeds with Beta 521 engine:
- Cilo Cross 521 & 512
- Pony Cross 521
- Pony GTX 521
The aluminum racing kit with Nikasil coating is an extremely reliable and durable cylinder.
Ø piston pin: 12 mm
Scope of delivery according to figure 1.
Note: The stud bolts supplied for the exhaust have a strength of 5.6. We recommend replacing these with item 10126 with increased strength in the accessories. Please observe the installation direction when assembling. The piston is inserted with the arrow pointing towards the outlet on the exhaust side.
| Nominal diameter | 40 mm |
| Manufacturer | Airsal |
| Material | Aluminum |
| Surface | sandblasted |
| Displacement | 50 ccm |
| Crankshaft stroke | 39 mm |
| Ø cylinder neck | 46 mm |
| Ø outlet inside | 21 mm |
| Ø piston pin (B) | 12 mm |
| Hole pattern [mm] | 48 x 48 |
| Outlet type | straight |
| Hole spacing outlet | 38 mm |
| Thread outlet | M6x1 (standard thread) |
| Number of fixing points | 4 pcs |
| Decompressor | No |
| Camouflaged | No |
| Area of application | Tuning |
| Pony / Cilo (Beta 521 & 512) | Beta 512 Beta 521 (engine) |
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