Crankshaft -DRT (rotary valve) - Vespa PK125 XL2, PK125 ETS
IMPORTANT: For this tuning crankshaft the housing must be machined.
It is a shaft with 53mm stroke /105mm connecting rod and a wider cheek
on the intake side. Here the intake timing was extended and by the wider
cheek a higher cross section in the intake is possible. The crankshaft stub is like
original on the ETS shafts 24 mm
(TW090123)