If you want to install a stable PK 125 ETS crankshaft in your V50, Primavera or ET3 engine case, you will have the problem that the shaft cannot be combined with the normal 6204 deep groove ball bearing on the alternator side.
The thicker diameter crankshaft stub requires a smaller needle bearing. To use this needle bearing in the engine block, it needs a reducing bushing. With it the alternator-side bearing (38x25x15mm) of the Vespa ETS / PX models can be used.
The installation is not difficult, but must be carried out professionally. Please see the instructions under downloads.
In addition to the bush offered here you need a construction adhesive (see under Accessories) and the actual bearing.
Note:Incorrect installation can cause serious engine damage, non-destructive disassembly of the intermediate bushing is normally not possible!
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