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 stems and locking types on the legend in the pictures.
| Nominal diameter | 39 mm |
| Ø outside piston (A) | 38.96 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 | D |
| Weight piston kit | 84 g |
| Zündapp | Belmondo (Type 247-71) Moped 25 (M 25) / Moped M 50 Bergsteiger (Type 247-434) |
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Material: Steel · Surface: burnished · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Total length: 130 mm · Width across flats: 10 mm · Width across flats: 17 mm · Number of components: 7 pcs · Area of application: (Dis)assembly tool
EUR 24.40
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
EUR 8.45
Explore categories from Piston
Moped fans also bought
Carburetor 17 mm Bing SSB 1/17/69 reproduction
Nominal diameter: 17 mm · Total length: 116 mm · Width: 86 mm · Height: 99 mm · Material: Aluminum · Component group Carburetor: Carburetor complete · Carburetor type: SSB · Camouflaged: No · Hole spacing inlet: 31 mm · Mounting type: Stud bolts & nuts · Ø fuel hose connection: 6.2 mm · Mixed oil connection: No · Vacuum connection: Yes · Choke control: without choke · Nozzle thread: MF7x0.75 (fine pitch thread) · Nozzle size: 76 · Clamping screw torque (max.): 3 N/m · Clamping screw torque (max.): 4 N/m · Area of application: Standard · Area of application: Tuning
EUR 97.90
Loctite 243 medium-strength threadlocker 10 ml
Color: blue · Manufacturer: Loctite · Material to be used: Aluminum · Material to be used: Metal · Material to be used: Steel · Contents: 10 ml · Hazard warning: Causes serious eye irritation · Hazard warning: Causes skin irritation · Hazard warning: Harmful to aquatic organisms (with long-term effects) · Hazard warning: May cause allergic skin reactions · Hazard warning: May irritate the respiratory tract · Signal word: Attention · Hazard pictogram: GHS07 - Caution dangerous · Hazard pictogram: GHS09 - Hazardous to the aquatic environment · Adhesion: medium strength · Temperature resistance (min.): -75 - 200 °C · Gap dimension (max.): 0.01 mm · Type of application: 1K · Alignment time: 600 sec · Breakaway torque (according to material): 3 N/m · Breakaway torque (according to material): 12 N/m · Breakaway torque (according to material): 26 N/m · Area of application: Chemistry
EUR 26.90
EUR 2’690.00/l
swiing® revival gasket outlet | Zündapp Belmondo
Total length: 53 mm · Thickness: 1.5 mm · Manufacturer: swiing® revival parts · Ø outside: 38.3 mm · Number of fixing points: 2 pcs · Hole spacing: 40 mm · Ø mounting hole: 7.1 mm · Material: Graphite / Graphite · Place of use: Outlet · Ø inside: 25 mm
EUR 4.80
Spoke set incl. nipple (2.9 x 160 mm) galvanized steel
Nipple length: 15 mm · Material: Steel · Surface: galvanized (blue) · Quantity: 40 pcs · Nominal diameter (thread): 3.2 mm · Length from hook: 160 mm · Ø spoke: 2.9 mm · Ø spoke head: 5.6 mm · Thread length: 11.5 mm · Ø nipple head: 9 mm · Ø Nipple neck: 5.6 mm · Hook length: 10.3 mm · Hook angle: 95 °
EUR 46.50
Magneti Marelli SNA7 spark plug short thread
Manufacturer: Magneti Marelli · Candle designation: SNA7 · Candle thread type: short · Spark plug socket: M4 · Spark plug socket: SAE · Electrode material: Nickel · Suppressed: No · Width across flats: 20.8 mm · Thread type: MF14x1.25 (fine pitch thread) · Area of application: Tuning
EUR 9.70
Motorex ATF gear oil "Dexron III" 1 L
Manufacturer: Motorex · Oil type: ATF Dexron 3 (DEXIII) · Contents: 1000 ml · Gearbox type: Automatic machine · Hazard warning: Harmful to aquatic organisms (with long-term effects) · Temperature resistance (min.): 170 °C · Area of application: Gearbox lubrication with clutch
EUR 26.40
EUR 26.40/l
Working late? Evening hours on Thursday until 20:00
