Montageanleitung 
Authentic 39 mm cylinder (including head) compatible with your Zündapp Belmondo moped / moped with chassis number 71 and engine type 247, as well as the Zündapp M25 and M50 Bergsteiger mopeds with chassis number 434 and engine type 247.
In addition to these models, the cylinder also fits ALPA Spezial 3000 or ALPA Black River small motorcycles equipped with a Zündapp Type 247 engine.
This high-quality cylinder kit—including a cylinder head from the premium swiing® ingenious brand—paired with the legendary Vertex piston in OEM quality, delivers 1.6 PS to the rear wheel when properly tuned.
The Nikasil coating ensures optimal lubrication and durability, while the split transfer ports optimize fuel-air mixture flow.
In addition to the cylinder, cylinder head, and piston, the package also includes all gaskets, studs, and silent blocks. All instructions for installing and breaking in the cylinder are explained in the video.
Please select the desired cylinder head—with or without a decompression hole—from the drop-down menu.
Notes:
For Zündapp engines with an 85 mm short connecting rod, you must first convert to a long connecting rod with a length of 91 mm (center-to-center) before using the cylinder.
Please observe the installation direction during assembly.
The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
A sophisticated product meeting the highest standards of the swiing® quality brand.
Original Zündapp part number: 247-02.709, 247-02.112
Hole pattern [mm]: 44 x 42 · Manufacturer: swiing® ingenious parts · Material: Aluminum · Surface: sandblasted · Displacement: 50 ccm · Crankshaft stroke: 42 mm · Nominal diameter: 39 mm · Ø cylinder neck: 48 mm · Ø Inlet inside: 9.2 mm · Thread inlet: M6x1 (standard thread) · Hole spacing inlet: 40 mm · Ø piston pin (B): 18.5 mm · Outlet type: slanted · Hole spacing outlet: 40 mm · Thread outlet: M6x1 (standard thread) · Number of fixing points: 4 pcs · Decompressor: No · Camouflaged: No
Manufacturer: swiing® revival parts · Material: Rubber, Steel · Ø inside: 8.2 mm · Ø outside: 19 mm · Ø Bundle: 25.5 mm · Total length: 21 mm
Material: Steel · Surface: blackened · Thread type: M6x1 (standard thread) · Total length: 145 mm · Thread length: 25.3 mm · Diameter: 5.2 mm · Nominal diameter (thread): 6 mm
| Zündapp | Belmondo (Type 247-71) |
Accessories & related products
swiing® ingenious piston 39 mm Vertex | Zündapp Belmondo, Bergsteiger
Manufacturer: swiing® ingenious parts · Ø outside piston (A): 38.95 mm · Compression height (C): 26.3 mm · Curvature (D): 1.5 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: Oblique push · Piston ring height: 1.5 mm · Ø piston pin (B): 12 mm · Weight piston kit: 82 g
EUR 72.20
swiing® revival connecting rod | Zündapp
Surface: copper-coated · Manufacturer: swiing® revival parts · Material: Steel · Connecting rod length center-center: 91 mm · Ø Connecting rod bolt: 16 mm · Total length: 115 mm · Ø lower connecting rod eye outside: 27 mm · Ø upper connecting rod eye outside: 23 mm · Thickness: 10 mm · Ø lower bearing inside: 21 mm · Ø inside upper bearing: 15 mm · Dimension lower bearing: 16/21 x 9.7 mm · Dimension upper bearing: 12/15 x 14.2 mm · Ø piston pin (B): 12 mm · Connecting rod pin length: 33.8 mm · Area of application: Standard · Area of application: Tuning
EUR 50.50
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swiing® ingenious 39 mm cylinder head (non-decorative version) | Zündapp Belmondo, Bergsteiger
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swiing® ingenious 39 mm cylinder head (decorative version) | Zündapp Belmondo, Bergsteiger
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