Solid-flange crankshaft for Puch E50 engines installed in Puch Maxi S / N mopeds.
The crankshaft, with its original 43 mm stroke, is made of forged steel, making it tougher and more durable than standard crankshafts.
To ensure perfect balancing and pre-compression of the crankshaft, the balancing holes are sealed with tungsten plugs.
The connecting rod eye has a diameter of 17 mm. This allows for the use of different needle bearings depending on whether a 12, 13, or 14 mm piston pin is used.
Total length of the clutch-side journal: 75 mm
Total length of the ignition-side journal: 67 mm
Ø 1st step (clutch side): 22 mm
Ø 2nd step (clutch side): 17 mm
Ø 3rd step (clutch side): 15 mm
Ø Step (ignition side): 17 mm
Ø crankshaft journals: 70 mm
Width of crankshaft journals: 34 mm
Ø connecting rod eye: 17 mm
Connecting rod length: 90 mm
Stroke: 43 mm
Note: The needle bearing is not included. It must be ordered separately.
Additionally, the housing must be cut out in the middle so that the reinforced connecting rod does not rub against the housing. You can find instructions from the manufacturer via the download link.
For the crankshaft, the bearing set for the older model with a 12 mm wide inner bearing ring can be used.
A quality product from the SRT brand.
| Manufacturer | SRT |
| Cheek type | Full cheeks |
| Area of application | Standard |
| Crankshaft stroke | 43 mm |
| Connecting rod length center-center | 90 mm |
| Total length of crankpin on clutch side | 75 mm |
| Total length crankpin ignition side | 67 mm |
| Ø crank webs | 70 mm |
| Ø Connecting rod eye | 17 mm |
| Ø piston pin (B) | 12 mm, 13 mm, 14 mm |
| Ø Bearing seat (clutch side) | 17 mm |
| Ø Bearing seat (ignition side) | 17 mm |
| Wide crank webs | 34 mm |
| Puch | E50 |
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