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: DE
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) | 38.965 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 |
Nominal diameter | 39 mm |
Piston ring mold | Rectangular ring |
Piston ring impact | Internal fuse (IS) |
Ø piston pin (B) | 12 mm |
Tolerance group | EN |
Piston weight | 86 g |
Zündapp Belmondo | |
Zündapp | 247 Motor |
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Material: Steel · Surface: burnished · Number of components: 7 pcs · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Total length: 130 mm · Width across flats SW: 10 mm · Width across flats SW: 17 mm · Area of application: (Dis)assembly tool
EUR 24.30
Moped fans also bought
swiing® revival wheel axle M10.5x1 x 175 coaster brake galvanized
Total length: 175 mm · Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Thread type: MF10.5x1 (fine pitch thread) · Thread length: 34 mm · Thread length: 45 mm · Ø shaft: 10.5 mm · Shank length: 95.6 mm
EUR 29.20
Motorex engine oil (gear oil) manual 450 ml
Manufacturer: Motorex · Viscosity (SAE): 80W · Oil type: GL4 · Contents [ml]: 450 ml · Gearbox type: Foot control · Gearbox type: Manual gearshift · Area of application: Gearbox lubrication with clutch · Temperature resistance (min.): -30 - 220 °C
EUR 12.10
EUR 26.89/l
swiing® revival needle roller bearing 12/15/14.2 original
Bearing cage: Sheet steel cage · Manufacturer: swiing® revival parts · Ø inside: 12 mm · Bearing type: Needle sleeve · Ø outside: 15 mm · Dimension needle bearing: 12/15 x 14.2 · Width: 14.2 mm · Alternative version of the Pony OEM number: A4222 · Tomos OEM number: 035548 · Alternative version of the Sachs OEM number: 0232 155 001
EUR 10.90
NGK BR9HIX Spark plug short thread suppressed Iridium
Manufacturer: NGK · Candle designation: BR9HIX · Candle thread type: short · Area of application: High End · Thread type: MF14x1.25 (fine pitch thread) · Area of application: MX · Area of application: Performance · Area of application: Racing · Area of application: Tuning · Width across flats SW: 21 mm · Spark plug socket: M4 · Spark plug socket: SAE · Electrode material: Iridium · Suppressed: Yes
EUR 28.70