
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 |
| Nominal diameter | 40 mm |
| Number of piston rings (F) | 2 pcs |
| Weight piston kit | 87 g |
| Pony / Cilo (Beta 521 & 512) | Beta 512 Beta 521 (engine) |
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Airsal 40 mm cylinder kit | Cilo Cross 521 / 512, Pony Cross 521, Pony GTX 521
Manufacturer: Airsal · Camouflaged: No · Material: Aluminum · Surface: sandblasted · Area of application: Tuning · Displacement: 50 ccm · Crankshaft stroke: 39 mm · Ø cylinder neck: 46 mm · Nominal diameter: 40 mm · Ø outlet inside: 21 mm · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Hole spacing outlet: 38 mm · Outlet type: straight · Thread outlet: M6x1 (standard thread) · Hole pattern [mm]: 48 x 48 · Decompressor: No
CHF 199.90
Airsal tuning set 43.5 mm | Beta 521 engine
Nominal diameter: 60 mm · Manufacturer: Airsal · Manufacturer: Dell'Orto · Manufacturer: NGK · Manufacturer: SITO · Manufacturer: swiing® ingenious parts · Manufacturer: swiing® revival parts · Displacement: 60 ccm · Ø piston pin (B): 12 mm · Outlet type: straight · Camouflaged: No · Area of application: Tuning
CHF 399.90
Not in stock
Meteor piston 41 mm | Beta 521 & 512
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 · Nominal diameter: 41 mm · 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
CHF 74.90
40 mm cylinder kit original engine | Beta 521 & 512
Manufacturer: Pony · Material: Gray cast iron · Displacement: 50 ccm · Crankshaft stroke: 39 mm · Nominal diameter: 40 mm · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Outlet type: straight · Thread outlet: M6x1 (standard thread) · Area of application: Original
CHF 184.90
swiing® revival gasket set cylinder original engine | Beta 521, 512
Manufacturer: swiing® revival parts · Number of components: 3 pcs · Material: Copper · Material: Sealing carton · Material: Sealing paper · Material: Sheet metal (steel) · Ø cylinder: 40 mm · Ø outlet inside: 22 mm · Hole pattern [mm]: 48 x 48 mm · Hole spacing outlet: 40 mm · Area of application: Original · Decompressor: Yes
CHF 13.90
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swiing® revival stud bolts M6 x 116 mm galvanized (10.9 strength)
Manufacturer: swiing® revival parts · Diameter: 5.9 mm · Material: Steel · Surface: galvanized (blue) · Total length: 116 mm · Thread type: M6x1 (standard thread) · Thread length: 15 mm · Thread length: 23 mm · Nominal diameter (thread): 6 mm
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swiing® revival gasket set | Pony / Cilo Beta 521
Manufacturer: swiing® revival parts · Number of components: 10 pcs · Material: Copper · Material: Sealing carton · Material: Sealing paper · Ø outlet inside: 21.6 mm · Hole spacing inlet: 35 mm · Hole pattern [mm]: 48 x 48 · Hole spacing outlet: 38 mm · Area of application: Standard · Decompressor: Yes
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