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. In addition, you can find out about the relevant piston rings, their stems and locking types on the legend in the pictures.
The piston kit contains piston pins, piston clips and piston rings.
You will find the corresponding assembly tools, piston pin locks and, if necessary, the corresponding cylinder in the accessories section.
| Nominal diameter | 39 mm |
| Ø outside piston (A) | 38.955 mm |
| Compression height (C) | 26.3 mm |
| Curvature (D) | 1.3 mm |
| Total piston height (E) | 51.65 mm |
| Number of piston rings (F) | 1 pcs |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Internal fuse (IS) |
| Ø piston pin (B) | 12 mm |
| Tolerance group | C |
| Piston weight | 84 g |
| Zündapp | Belmondo (Typ 247-71) Mofa 25 (M 25) / Moped M 50 Bergsteiger (Typ 247-434) |
Ratings
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Area of application: (Dis)assembly tool · Material: Steel · Surface: burnished · Total length: 130 mm · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Number of components: 7 pcs · Width across flats SW: 10 mm · Width across flats SW: 17 mm
23,20 EUR
Meteor piston pin Ø 12 mm (length: 31 - 40 mm)
Manufacturer: Meteor · Material: Steel · Surface: Hardened · Total length: 31 mm · Total length: 31.5 mm · Total length: 33 mm · Total length: 35.5 mm · Total length: 37 mm · Total length: 38 mm · Total length: 40 mm · Ø piston pin (B): 12 mm · Pony OEM number: A1112 · Sachs OEM no.: 0216 003 105
8,05 EUR
Moped fans also bought
swiing® revival needle roller bearing 12/15/14.2 original
Bearing type: Needle sleeve · Bearing cage: Sheet steel cage · Dimension needle bearing: 12/15 x 14.2 · Manufacturer: swiing® revival parts · Ø inside: 12 mm · Ø outside: 15 mm · Width: 14.2 mm · Alternative version of the Pony OEM number: A4222 · Alternative version of the Sachs OEM number: 0232 155 001 · Tomos OEM number: 035548
10,40 EUR
17 mm Bing SRF carburetor (replica)
Nominal diameter: 17 mm · Material: Aluminum · Component group Carburetor: Carburetor complete · Area of application: Tuning · Choke control: Hand choke · Carburetor type: SRF · Total length: 78 mm · Height: 117 mm · Nozzle thread: M4x0.7 (standard thread) · Ø Internal connection: 23 mm · Ø Air filter connection: 60 mm · Ø Air filter connection: 64 mm · Width: 64 mm · Ø fuel hose connection: 6 mm · Mixed oil connection: No · Mounting type: Plug connection clamped · Vacuum connection: No · Nozzle block: 2.xx · Clamping screw torque (max.): 3 N/m · Clamping screw torque (max.): 4 N/m
75,60 EUR
Bumm mirror round standard black / chrome
Mirror property: downsizing · Manufacturer: Bumm · Material: Glass · Material: Plastic · Material: Steel · Test mark: none · Color: Chrome · Color: black · Surface: chrome-plated · Surface: raw · Ø mirror surface: 102 mm · Ø mirror rod: 8 mm · Mirror rod length: 190 mm · Total length: 300 mm · Clamping diameter: 22 mm · Thread type: M8x1.25 (standard thread) · Thread size: M8
23,20 EUR
Collection only possible with online purchase and appointment.
