43.5 mm racing cylinder suitable for the following mopeds / mopeds with Beta 521 engine:
- Cilo Cross 521 & 512
- Pony Cross 521
- Pony GTX 521
The 57 cc racing kit made of aluminum with Nikasil coating is an extremely reliable and durable cylinder.
| Nominal diameter | 43.5 mm |
| Manufacturer | Airsal |
| Material | Aluminum |
| Camouflaged | No |
| Surface | sandblasted |
| Displacement | 57 ccm |
| Area of application | Tuning |
| Crankshaft stroke | 39 mm |
| Ø cylinder neck | 45.5 mm |
| Ø Outlet outside | 21 mm, 18 mm |
| Number of fixing points | 4 pcs |
| Ø piston pin (B) | 12 mm |
| Outlet type | straight |
| Hole spacing outlet | 38 mm |
| Thread outlet | M6x1 (standard thread) |
| Hole pattern [mm] | 48 |
| Pony / Cilo (Beta 521 & 512) | Beta 512 Beta 521 (engine) |
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