• Vortex ROK GP Junior 125cc Complete Engine official Vortex manufacturer image
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Vortex

Vortex ROK GP Junior 125cc Complete Engine

Vortex ROK GP Junior 125cc Complete Engine

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VOR-ROK-GP-JR-DRAFT

Rok GP Junior immediately conquered the hearts of drivers around the world, for his spirited soul and a practical structure, which aims to achieve high performance, while ensuring high reliability.

Specifications

Displacement 125 CC
Engine 2 stroke
Cooling System Liquid-cooled through external water pump
Exhaust Rok GP moulded exhaust with integrated exhaust silencer
Bearings Radial bearing C4
Bore and stroke 54.07x54mm
Max Torque 20.2 Nm a 11.500 Rpm
Max rpm 15.000 Rpm (electronically limited)
Ignition PVL digital ignition
CArburettor Dell'Orto VHSH Ø 30mm
Silencer Arrow intake silencer
Fuel Pump Dell'Orto

Features

  • Reed valve intake in the crank case
  • Balancer shaft
  • Integrated electrical starter
  • Centrifugal dry-clutch
  • Mixture-lubricated
  • 5/3 transfer ducts intake
  • Reed valve intake in the crankcase
  • Cast iron made cylinder CNC worked

Manufacturer data: vortex-engines.com · Documents: 1_Rok Gp Junior_ 2026_rev01.pdf · retrieved 2026-09-05

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Specifications

Specification Value
SKU VOR-ROK-GP-JR-DRAFT
Brand Vortex

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