
Replacement piston suitable for the 40 mm racing cylinder for the following mopeds / mopeds with Beta 521 engine:
Note: Please observe the installation direction when assembling. The piston is inserted with the arrow pointing towards the outlet on the exhaust side.
| Manufacturer | Airsal |
| Number of piston rings (F) | 2 pcs |
| Nominal diameter | 40 mm |
| Weight piston kit | 87 g |
| Pony / Cilo (Beta 521 & 512) | Beta 512 Beta 521 (engine) |
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Airsal 40 mm cylinder kit | Beta 521
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 · Hole spacing outlet: 38 mm · Ø piston pin (B): 12 mm · Hole pattern [mm]: 48 x 48 · Area of application: Tuning · Outlet type: straight · Thread outlet: M6x1 (standard thread) · Number of fixing points: 4 pcs · Decompressor: No · Camouflaged: No
EUR 241.10
Airsal tuning set 43.5 mm | Beta 521 engine
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EUR 482.30
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Meteor piston 41 mm | Beta 521 & 512
Nominal diameter: 41 mm · Manufacturer: Meteor · Ø outside piston (A): 40.94 mm · Compression height (C): 28 mm · Curvature (D): 4 mm · Total piston height (E): 52 mm · Number of piston rings (F): 2 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.5 mm · Ø piston pin (B): 12 mm · Weight piston kit: 90 g
EUR 90.30
40 mm cylinder kit original engine | Beta 521 & 512
Material: Gray cast iron · Manufacturer: Pony · Nominal diameter: 40 mm · Displacement: 50 ccm · Crankshaft stroke: 39 mm · Area of application: Original · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Outlet type: straight · Thread outlet: M6x1 (standard thread)
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swiing® revival gasket set cylinder original engine | Beta 521, 512
Manufacturer: swiing® revival parts · Material: Copper · Area of application: Original · Material: Sealing carton · Material: Sealing paper · Material: Sheet metal (steel) · Number of components: 3 pcs · Ø cylinder: 40 mm · Ø outlet inside: 22 mm · Hole spacing outlet: 40 mm · Hole pattern [mm]: 48 x 48 mm · Decompressor: Yes
EUR 16.80
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swiing® revival gasket set | Pony / Cilo Beta 521
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