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 dimensioning 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.
| 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 |
| Weight piston kit | 86 g |
| Zündapp OEM number | 248-02.703 |
| 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 · Number of components: 7 pcs · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Width across flats: 10 mm · Width across flats: 17 mm · Total length: 130 mm · Area of application: (Dis)assembly tool
EUR 23.80
Explore categories from Piston
Moped fans also bought
Nos
Hot 
BERU Spark Plug Connector, 1 kΩ, Noise-Suppressed, NOS
Manufacturer: BERU · Material: Sheet metal (steel) · Ø cable: 5 mm · Ø cable: 7 mm · Spark plug socket: M4 · Cable available: No · Suppressed: Yes · Resistance: 1000 Ω · Subcategory: Spark plug connector · Color: silver · Pony OEM number: A2099 · Sachs OEM no.: 0265 100 00
EUR 11.90
- 16 %
Hot
swiing® revival Stud Bolt, Inlet/Outlet M6x30 (Grade 10.9)
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Diameter: 5.95 mm · Total length: 30 mm · Nominal diameter (thread): 6 mm · Thread type: M6x1 (standard thread) · Strength class: 10.9 · Thread length: 12 mm
EUR 2.15
EUR 1.80
swiing® revival wheel axle M10.5x1 x 175 coaster brake galvanized
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Ø shaft: 10.5 mm · Shank length: 95.6 mm · Thread type: MF10.5x1 (fine pitch thread) · Thread length: 34 mm · Thread length: 45 mm · Total length: 175 mm
EUR 28.60
Not in stock
Motorex engine oil (gear oil) manual 450 ml
Manufacturer: Motorex · Oil type: GL4 · Viscosity (SAE): 80W · Contents: 450 ml · Gearbox type: Foot control · Area of application: Gearbox lubrication with clutch · Gearbox type: Manual gearshift · Temperature resistance (min.): -30 - 220 °C
EUR 13.00
EUR 28.89/l
Meteor piston 38.955 mm #BC | Zündapp Belmondo, Bergsteiger
Manufacturer: Meteor · Nominal diameter: 39 mm · Ø outside piston (A): 38.955 mm · Ø piston pin (B): 12 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 · Piston ring impact: Internal fuse (IS) · Tolerance group: BC · Weight piston kit: 86 g · Zündapp OEM number: 248-02.703
EUR 71.70
swiing® ingenious pinion shaft reinforced | Zündapp Belmondo, Bergsteiger / Alpa
Manufacturer: swiing® ingenious parts · Material: Copper · Material: Steel · Surface: blank · Surface: coated · Thread type: MF12x1 (fine pitch thread) · Recording type: Ø15 x SW12 · Ø inside: 12 mm · Ø outside: 22 mm · Ø outside: 23.8 mm · Total length: 82.6 mm
EUR 93.20
Working late? Evening hours on Thursday until 20:00
