Vespa V50 Special Prim ET3 PK50-125 S/XL Polini '4 Gear PK' Selector

Product Code: BD16181


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Vespa V50 Special Prim ET3  PK50-125 S/XL Polini '4 Gear PK' Selector

For Vespa 50 S 3°/Special V5B3-4T 2°/SR (D)/100 2°/125 PV 2°ET3 2°/PK50-125/S/XL/XL2

  • h50.2mm
  • type: round/50.2mm

Gears jumping out are a sure sign of a worn shifting claw.
This should be replaced as soon as possible in order to avoid a defect of further transmission parts. When disassembling, also inspect the tooth flanks of the transmission gears. If these show pitting marks, they should be replaced. The following types of shifting claws are available:

three-speed gearbox: The three-speed claw is easiest to identify by its only four existing detent points (three gears + neutral). The very early 3-speed transmissions (up to chassis no. 15325) also have only two arms instead of four.

four-speed transmission: There are two different designs. These can be quickly distinguished in the area of the pins that engage in the gearwheel (exception DRT*)

V50, PV, ET3:

  • Shapes: Angular (right-angled)
  • Lock points: 5
  • Height: 51mm.


  • Shaping: Round (radius)
  • Locking points: 5
  • Building height: 50mm

Attention: The PK version has already been partly used in the last years of construction of the V50 (V5A1T from No. 69444), Special (V5B3T from no. 94315), Elestart (V5B4T from no. 1514) as well as the PV125 (VMA2T from no. 150203) and ET3 (VMB1T from no. 8161)!