39.0 mm piston with a rectangular piston ring with internal fuse (IS), suitable for Zündapp Belmondo mopeds, Zündapp Bergsteiger M25/M50 mopeds, as well as Alpa Spezial 3000 or Alpa Black River small motorcycles which have a Zündapp type 247 engine installed.
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 positions and locking types on the legend in the images.
Tolerance type: AB
The piston kit contains piston pins, piston clips and piston rings.
Corresponding assembly tools, piston rings, piston pin locks etc. can be found under accessories.
Quality product from the Italian manufacturer Meteor.
| Manufacturer | Meteor |
| Ø outside piston (A) | 38.95 mm |
| Compression height (C) | 26.2 mm |
| Curvature (D) | 1.3 mm |
| Total piston height (E) | 51.5 mm |
| Number of piston rings (F) | 1 pcs |
| Piston ring mold | Rectangular ring |
| Nominal diameter | 39 mm |
| Piston ring impact | Internal fuse (IS) |
| Ø piston pin (B) | 12 mm |
| Tolerance group | AB |
| Weight piston kit | 86 g |
| Zündapp | Belmondo (Type 247-71) Moped 25 (M 25) / Moped M 50 Bergsteiger (Type 247-434) |
Ratings
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Material: Steel · Surface: burnished · Area of application: (Dis)assembly tool · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Number of components: 7 pcs · Total length: 130 mm · Width across flats: 10 mm · Width across flats: 17 mm
EUR 24.20
Moped fans also bought
ESJOT sprocket 37 teeth coaster brake galvanized
Chain type: 415H · Manufacturer: ESJOT · Material: Steel · Surface: galvanized (blue) · Number of teeth: 37 pcs · Ø inside: 94 mm · Thickness: 4.1 mm · Chain pitch: 1/2" x 3/16" · Color: silver · Ø bolt circle: 105.5 mm · Hole spacing: 74 mm · Ø mounting hole: 6.5 mm · Number of fixing points: 4 pcs
EUR 58.20
swiing® revival screw set for sprocket mounting coaster brake
Manufacturer: swiing® revival parts · Material: Chrome steel (colloquially known as stainless steel) · Material: Steel · Surface: blank · Surface: galvanized (blue) · Drive: External hexagon · Color: gray · Screw head: Hexagon · Shank: No · Number of components: 12 pcs · Thread type: M6x1 (standard thread) · Width across flats: 8 mm · Width across flats: 10 mm · Thread length: 12 mm
EUR 24.20
swiing® revival tank mount chrome | Puch X30 Sport, Velux
Manufacturer: swiing® revival parts · Material: Chrome steel (colloquially known as stainless steel) · Material: Steel · Surface: galvanized (blue) · Surface: raw · Color: Chrome · Mounting type: Nuts & bolts · Number of fixing points: 2 pcs
EUR 48.50
Collection only possible with online purchase and appointment.
