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High-end racing crankshaft suitable for manual Puch X30 NS / NL Z50 engines (air cooling).
Attention: Not suitable for Puch X30 Velux engines (blower cooling)!
High-quality and precisely fitting, 942 gram full cheek crankshaft, which has proven itself in various load tests. This was designed for use in engines with a large increase in power.
All balancing holes in the cheeks have been sealed with aluminum inserts for maximum pre-compression.
The solid connecting rod is fitted with a more stable 16 mm connecting rod pin, 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 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 gasket and housing/cylinder. You will also find a suitable sealant among the accessories.
- 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 45 mm cylinder kits, depending on the model, pre-compressed air may enter the intake port through the holes in the piston.
Dimensions of the crankshaft:
- Total length of clutch-side crankpin: 57 mm
- Total length of clutch-side crankpin: 66 mm
- Length of 1st shoulder (clutch side): 20 mm
- Length 2nd shoulder (clutch side) 19 mm
- Ø 1st shoulder (clutch side): 17 mm
- Ø 2nd heel (clutch side): 15 mm
- Thread (coupling side): MF10x1 mm
- Length of shoulder (on coupling side): 27 mm
- Ø shoulder (on end face): 17 mm
- Thread (on end face): 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 (center-to-center): 90 mm
- Stroke: 44 mm (+1 mm to original shaft)
- Weight (incl. connecting rod): 942 grams
- . Connecting rod): 942 grams
- Dimension needle bearing: Ø 12 / 15 x 14.2 mm (axe 12)
The needle bearing is included in the scope of delivery.
You can find the matching bearings and oil seals in the accessories section.
Made by the quality brand swiing – swiss ingenious.
Suitable for the following models
| Puch | Z50 (X30 Sport) |
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