High-end racing crankshaft suitable for Puch Maxi S, Supermaxi LG2 and Puch X30 NG-2AH mopeds / mopeds which have a ZA50 engine installed.
High-quality and precisely fitting, 1062 gram full cheek crankshaft, which has proven itself in various load tests.
This crankshaft was designed for use in engines with a large increase in power.
All balancing holes in the cheeks were sealed with aluminum inserts for maximum pre-compression.
The solid connecting rod is equipped with a more stable 16 mm connecting rod bolt, which is hollow on the inside for better balancing.
In addition, the connecting rod bearings are silver bearings, which have excellent emergency running properties.
The world's first ZA50 crankshaft with the correct dimensions and tolerances of the clutch-side cheek pin and its thread.
Not to be compared with unsuitable competitor products from Western Europe.
Ø Brass journal: 9.5 mm (clutch piston with an inner diameter of 9.55 mm fits this crankshaft).
The following points should be noted when using this crankshaft:
- The use of a 0.5 mm thick stroke plate is essential to compensate for the additional stroke. You will find suitable models in the accessories section. We also recommend using sealant between the seal and housing/cylinder. You can also find a suitable sealant in the accessories section.
- When installing, observe the crushing edge dimension (distance piston – cylinder head at TDC). This should not be less than 1 mm.
- Due to the longer stroke, the pressure in the crankcase increases. For this reason, the oil seal on the crankshaft end should either be glued in with 2-component adhesive or secured with a retaining plate.
- Running in the crankshaft: Run the engine for 30 minutes under low load with a slightly richer mixture.
- When using cylinder kits with boost ports, the pre-compressed air may enter the intake port through the holes in the piston, depending on the model.
Dimensions of the crankshaft:
- Total length of clutch-side cheek pin: 117.8 mm
- Total length of clutch-side cheek pin: 79.5 mm
- Ø 1st shoulder (clutch side): 20 mm
- Ø 2nd shoulder (clutch side): 16.4 mm
- Ø 3rd shoulder (clutch side): 9.5 mm
- Thread on clutch side: M16x1.5 mm
- Ø Heel (coupling side): 17 mm
- Thread on the Zünd side: MF10x1 mm
- Ø Crank webs: 69.9 mm
- Width of crank webs: 34 mm
- Ø connecting rod eye top: 15 mm
- Ø connecting rod pin bottom: 16 mm
- Length of connecting rod: 90 mm
- Stroke: 44 mm
- Weight (incl. connecting rod): 1062 grams
- . Connecting rod): 1062 grams
The needle bearing (12/15 x14.2 mm) is included in the scope of delivery.
The matching bearings and oil seals can be found under accessories.
Exceptional product for the highest demands of the quality brand swiing®.
Details
| Manufacturer | swiing® ingenious parts |
| Weight | 1062 g |
| Cheek type | Full cheeks |
| Connecting rod length center-center | 90 mm |
| Crankshaft stroke | 44 mm |
| Ø piston pin (B) | 12 mm |
| Total length of crankpin on clutch side | 117.8 mm |
| Total length crankpin ignition side | 79.5 mm |
| Ø crank webs | 69.9 mm |
| Ø Connecting rod eye | 15 mm |
| Area of application | Racing, High End |
| Ø Bearing seat (clutch side) | 20 mm |
| Ø Bearing seat (ignition side) | 17 mm |
| Thread type | MF10x1 (fine pitch thread) |
| Dimension needle bearing | 12 / 15 x 14.2 mm (axe 12) |
| Wide crank webs | 34 mm |
| Ø 1st step (on the coupling side) | 20 mm |
| Ø 2nd shoulder (on the clutch side) | 16.4 mm |
| Ø 3rd step (on the clutch side) | 9.5 mm |
| Puch OEM number | 321.1.10.615.0 |
Suitable for the following models
| Puch | ZA50 (air-cooled) ZA50 (fan-cooled) |
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