Forged Wössner high-performance piston for the 47 mm Gilardoni italkit Puch cylinder kit.
ZME forged piston developed by MBR, featuring 1 mm rectangular piston rings with internal locking (IS), which is very commonly used in the Mofacross and Mofacup scenes.
Optimal material structure, a flow-optimized shape, and generously sized intake ports characterize this high-quality racing piston.
You can find the detailed dimensions of the piston according to the technical drawing in the product details. You can also find information about the standard piston rings, their clearances, and retaining methods in the legend accompanying the images.
The molybdenum coating, when combined with oil, provides technologically advanced wear protection with excellent sliding properties.
Recommended piston size (coating corresponds to +0.01 mm to +0.02 mm):
Gilardoni italkit Cylinder A (47.00 mm): 46.94 mm piston (in exceptional cases, e.g., when using ASPEN: 46.93 mm piston)
Gilardoni italkit Cylinder B (47.01 mm): 46.95 mm piston
Gilardoni italkit Cylinder C (47.02 mm): 46.96 mm piston
Piston rings, piston pins, and piston pin retainers are included in the scope of delivery.
Note: Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
You can find compatible components such as cylinder kits, needle bearings, lift plates, carburetors, air filters, etc., in the accessories section.
A quality product from the German manufacturer Wössner.
| Manufacturer | Wössner, MBR |
| Surface | molybdenum-coated |
| Nominal diameter | 47 mm |
| Ø outside piston (A) | 46.96 mm |
| Compression height (C) | 22 mm |
| Curvature (D) | 2.65 mm |
| Total piston height (E) | 48.45 mm |
| Number of piston rings (F) | 1 pcs |
| Piston ring mold | Rectangular ring |
| Ø piston pin (B) | 12 mm |
| Piston ring impact | Internal fuse (IS) |
| Piston ring height | 1 mm |
| Weight piston kit | 93 g |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
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