ROK Shifter Engine

ROK Shifter Engine


Classes: Shifter ROK & Shifter Master ROK

The Rok Shifter engine was born to meet the needs of many drivers who want to compete in a category with the gearbox, but always according to the Rok philosophy: low costs and steady regulations over the time.

The engine has the following features: Single-cylinder 2 stroke engine with 6-speed gearbox with front clutch system, displacement 125 cc, 4 reed valve intake in the crankcase. Liquid-cooled through external pump (not supplied in the kit).

The engine comes complete with Dell’Orto VHSH Ø 30mm carburetor, Dell’Orto fuel pump, Arrow intake silencer, molded exhaust and exhaust silencer.

Ready for a power of 43 HP, the Rok Shifter is the engine that provides the best combination of performance and operating costs.


View Engine Statistics Download Engine Fiche Download Manual Parts Catalog


  • Single-cylinder 2 stroke
  • Displacement 125 cc
  • Reed valve intake in the crankcase
  • Liquid-cooled through external pump
  • Push-to-start system
  • Front clutch six-speed gearbox system
  • PVL analogic ignition
  • Dry clutch
  • Mixture-lubricated
  • Cast iron made cylinder CNC worked
  • 5/3 transfer ducts intake
  • Oval exhaust and 2 boosters
  • Radial bearing C4
  • Bore and stroke 54×54.5mm
  • 43HP at 13.900 Rpm
  • Max 14.000 Rpm
  • PVL analogic ignition
  • Dell’Orto VHSH Ø 30mm carburettor
  • Arrow intake silencer
  • Dell’Orto fuel pump
  • Shifter Rok moulded exhaust
  • Exhaust silencer ROK in aluminium
  • Magnesium engine mount
  • Engine weight 58 lbs.


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