45 mm replacement piston with two 1.5 mm rectangular piston rings with internal fuse (IS) for various Puch mopeds / mopeds with Athena AJH cylinders.
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 | 45 mm |
| Manufacturer | Athena |
| Ø outside piston (A) | 44.93 mm |
| Compression height (C) | 24.9 mm |
| Curvature (D) | 2.82 mm |
| Total piston height (E) | 50.8 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 |
| Tolerance group | B |
| Weight piston kit | 94 g |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
Accessories & related products
Athena 45 mm cylinder kit incl. diaphragm AJH | Puch
Manufacturer: Athena · Material: Aluminum · Camouflaged: No · Surface: sandblasted · Area of application: Tuning · Displacement: 70 ccm · Crankshaft stroke: 43 mm · Ø cylinder neck: 47.8 mm · Nominal diameter: 45 mm · Ø outlet inside: 26 mm · Number of fixing points: 4 pcs · Ø Inlet inside: 16 mm · Inlet window: 38 x 25 mm · Thread inlet: M6x1 (standard thread) · Hole spacing inlet: 40 mm · Hole spacing inlet: 60 mm · Ø piston pin (B): 12 mm · Hole spacing outlet: 42 mm · Outlet type: straight · Thread outlet: M6x1 (standard thread) · Hole pattern [mm]: 44 x 44 · Decompressor: No
EUR 355.70
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Number of components: 7 pcs · Material: Steel · Surface: burnished · Area of application: (Dis)assembly tool · Total length: 130 mm · Width across flats: 10 mm · Width across flats: 17 mm
EUR 24.00
Explore categories from Piston
Moped fans also bought
ESJOT sprocket 45 teeth 4-hole coaster black
Chain pitch: 1/2" x 3/16" · Chain type: 415H · Manufacturer: ESJOT · Material: Steel · Surface: powder-coated · Color: black · Number of teeth: 45 pcs · Thickness: 4.5 mm · Ø inside: 94 mm · Number of fixing points: 4 pcs · Ø mounting hole: 6.4 mm · Ø bolt circle: 105 mm · Hole spacing: 74 mm
EUR 72.20
Magura cable clamp Ø 8 x 15 mm
Ø Cable bushing: 2.3 mm · Manufacturer: Magura · Material: Brass · Material: Steel · Surface: galvanized (blue) · Surface: nickel-plated · Area of application: Standard · Thread type: M6x1 (standard thread) · Ø outside: 8 mm · Ø Bundle: 6 mm · Total length: 15 mm · Screw head: Hexagon · Thread length: 7 mm · Width across flats: 7 mm · Drive: External hexagon · Drive: Slot
EUR 3.00
swiing® revival Stud Bolt, Inlet/Outlet M6x30 (Grade 10.9)
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Diameter: 5.95 mm · Thread type: M6x1 (standard thread) · Nominal diameter (thread): 6 mm · Total length: 30 mm · Thread length: 12 mm · Strength class: 10.9
EUR 2.20
Magura set screw M6 x 34 lock nut SW8
Slotted: No · Width across flats Screw: 8 mm · Manufacturer: Magura · Width across flats nut: 8 mm · Material: Brass · Material: Steel · Surface: galvanized (blue) · Surface: nickel-plated · Thread type: M6x1 (standard thread) · Ø cable holder: 3.05 mm · Ø Receptacle: 7.05 mm · Thread length: 24 mm · Total length: 34 mm
EUR 3.00
Hot 
Inner cable set automatic | Puch E50
Nipple shape: Barrel (transverse) · Nipple shape: Cylinder · Nipple shape: Pears · Manufacturer: Made in Germany · Material: Steel · Ø Stranded wire: 1.25 mm · Ø Stranded wire: 1.5 mm · Ø Stranded wire: 1.8 mm · Quantity: 4 pcs · Total length: 1600 mm · Total length: 2200 mm
EUR 11.90
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
