With this nice build crank shaft BGM closes the gap for rotary driven smallframe cranks. It is technically orientated on the original Vespa ETS crank, but is supplied with high quality elements, like the overlap against twisting, a well build piston rod with good lubricating holes and strong crank webs.
The The PK XL2, ETS 125 has the most solid taper of the Vespa Smallframes. Therefore it is capable to sustain much higher forces. An additional feature is that it can be used with the ultra light flywheels for much improved acceleration and power output.