ROK VLR Engine


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The ROK VLR is the perfect engine for the entry-level driver, the ROK VLR not only offers superior performance over its rivals with lower maintenance, but it also offers some great features like electric start. All at a cost racers can afford.

The new ROK VLR engine was designed solely with club racers in mind, whether it’s a new racer getting into karting, or for those looking to move up from a four-cycle powerplant. Great for the racer that wants to update their current 100cc to a state-of-the-art engine package. The new ROK VLR engine comes complete ready to race minus the engine mount.The ROK VLR engine can be utilized in Junior VLR (ages 12-15), Senior VLR (ages 15+) and Masters VLR (ages 32+).
Measurement Tolerances
  • Max Power: 20 HP at 9.800 RPM
  • Max Torque: 1,4 KGM at 9.600 RPM
  • Single-cylinder 2 stroke engine
  • Displacement 100 cc
  • Reed Valve
  • Air-cooled system
  • Integrated electrical starter
  • Centrifugal dry-clutch
  • Mixture-lubricated
  • Cast iron made cylinder CNC worked
  • 1 elliptical port plus 2 boosters
  • Piston ring L type
  • Bore and stroke 48x54mm
  • Selettra analogic ignition
  • Butterfly valve 24mm carburetor
  • Vortex intake silencer
  • Engine weight 45 lbs.
  • Engine Weight: 45lbsOPENING ANGLES (all mesurement done with 0.20mm feeler gauge)
    Tolerances: Inlet 126° ± 2°, Exhaust 164° ± 2°
  • Carburetor Butterfly valve/24 mm
  • Generator for battery
  • Charging: On board
  • Electric starter: On board
  • Exhaust with flex: Exhaust with silencer
  • Cylinder AL – SI ALLOY
  • Connecting rod NI – CR – MO STEEL
  • Crankshaft NI – CR – MO STEEL
  • Head AL – SI ALLOY
  • Liner IRON
  • Crankcase AL – SI ALLOY
  • Piston AL – SI ALLOY
  • Piston Ring STEEL OR IRON


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