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)

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Ball bearing
Dimensions
15x19x20mm
 
Piston pin
Diameter
15 mm
 
Crankshafts
Stroke
53 mm
Crankcase must be spindled
ja
Motor housing must be modified
ja
Rotary vane crankshaft
ja
Full cheek crankshaft
nein
Bearing seat diameter on alternator side
25 mm
Bearing seat diameter on drive side
17 mm
Diameter of sealing ring seat on alternator side
24 mm
Diameter of sealing ring seat on drive side
22.7 mm
 
Connecting rod
Connecting rod length
105 mm
Connecting rod eye top diameter
19 mm
 
OEM numbers (for comparison purposes only)
Scooter Center:
7675254
DRT:
01253A105GT