43.50 mm replacement piston with two 1 mm rectangular piston rings with internal fuse (IS) to fit the cylinder kit for Cilo Cross 521 & 512, Pony Cross 521 / GTX 521 mopeds / mopeds.
The detailed dimensions of the piston according to the technical drawing can be found in the details. You can also find out about the relevant piston rings, their stems and locking types on the legend in the pictures.
Nominal diameter: 43.5 mm · Weight piston kit: 97 g
| Manufacturer | Airsal |
| Ø outside piston (A) | 43.5 mm |
| Compression height (C) | 25.8 mm |
| Curvature (D) | 4.25 mm |
| Total piston height (E) | 52.2 mm |
| Number of piston rings (F) | 2 pcs |
| Nominal diameter | 43.5 mm |
| Piston ring mold | Rectangular ring |
| Ø piston pin (B) | 12 mm |
| Piston ring impact | Internal fuse (IS) |
| Piston ring height | 1 mm |
| Pony / Cilo (Beta 521 & 512) | Beta 512 Beta 521 (engine) |
Ratings
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Manufacturer: GPO · Area of application: (Dis)assembly tool · Material: Steel · Surface: burnished · Width across flats: 10 mm · Width across flats: 17 mm · Total length: 130 mm · Number of components: 7 pcs
23,40 EUR
21,10 EUR
Hot 
Airsal 43.5 mm cylinder kit Beta | Cilo Cross 521 / 512, Pony Cross 521, Pony GTX 521
Nominal diameter: 43.5 mm · Manufacturer: Airsal · Material: Aluminum · Area of application: Tuning · Surface: sandblasted · Displacement: 57 ccm · Crankshaft stroke: 39 mm · Ø cylinder neck: 45.5 mm · Ø Outlet outside: 18 mm · Ø Outlet outside: 21 mm · Ø piston pin (B): 12 mm · Outlet type: straight · Hole spacing outlet: 38 mm · Thread outlet: M6x1 (standard thread) · Hole pattern [mm]: 48 x 48 · Number of fixing points: 4 pcs · Camouflaged: No
235,20 EUR
Not in stock
Explore categories from Piston
Moped fans also bought
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
