• Micro Rok
  • Mini Rok
  • Junior Rok
  • Rok GP
  • Rok DVS
  • Rok Shifter
  • Rok TT


  • Single-cylinder 2 stroke engine
  • Piston port intake
  • Diplacement 50cc
  • Iron made cilynder
  • 2 transfer ducts intake
  • L segment
  • 4.5 Hp at 10.000 rpm
  • Max 13.000 rpm
  • Selettra Analogic ignition
  • Free air cooling system
  • Centrifugal dry-clutch
  • Fuel pump and Dell’Orto PHBN 14  Ø 14 mm carburettor
  • Mixture-lubricated
  • Integrated electric starter
  • Optional: pull starter

Small, very small indeed. Lots of fun and safe to drive. These are the highlights of Micro Rok, designed to meet the wide audience of the young drivers who wish to become true Rokkers.
Beautiful as few other two-stroke racing engines are, the Micro is built with the renowned quality standards of all multi award winning and World Championship winning engines.
Every detail is well finished and such a compact engine has never seen such qualities until now. So much attention to detail comes alive with the pleasant sound of the Micro when even the inexperienced Rokker steps on the gas and the Rok Micro slips away like an arrow. It has an adequate yet appropriate performance level according to the age of drivers to whom it is aimed (6 years and older).
Micro is the size of this engine, Micro is the cost of maintenance but Macro is the fun that this member of the Rok family provides.


  • Engine displacement 60cc
  • Free air cooling
  • Intake piston port
    2 transfers inlet
  • Exhaust without rib
  • Coated piston
  • Piston ring ac
  • Silver plated cage d.18 mm
  • Radial bearingc4
  • Analogic ignition selettra
  • Centrifugal dry clutch
  • Electric starter on board



The MINIROK 60 is the engine with which Vortex enters the world of the younger. Built according to the new CSAI FIK technical rules of the Italian MINI 60 and BABY 60 categories, the Minirok is a completely innovative engine for the younger!

Vortex has developed two Minirok engines:
MINIROK MINI 60 and MINIROK BABY 60: the two versions differ from one another incarburettor and exhaust.

MINIROK BABY 60: supplied with carburettor Ø 14mm and baby exhaust (reduced power); dedicated to the youngest; it is the entry level in the karting world.

MINIROK MINI 60: supplied with carburettor Ø 18mm and mini exhaust; it is the second step in competitions, usually from 9 to 12 years old drivers.

Technical characteristics:
It is a piston port engine cooled air free typical of the karting school, where the body and the finning have been dimensioned in order to obtain the greatest thermic and dimensional stability, paying particular attention to the most stressed part near the
The constructive architecture of the engine is that of a high performance engine: the gravity chill castings, the cast iron liner with a great thickness, the head with the radial fins, the crankcase with wide air passages for the cooling are only some of the characteristics that have been moved into this project.
Also the cycle of the mechanical manufacturing is exactly that, which helps the engines of superior categories to reach the
performing levels that we can see nowadays.
The centrifugal clutch with monolithic rotor and the electric starter on board complete the configuration of an engine expressly born for the competitions and, at the same time, reliable and easy to drive.
It’s important to underline that thanks to this manufacturing method, all the engines have the same performances and this keeps the qualitative standard high and constant.


  • Bore 54mm
  • Stroke 54mm
  • Displacement 123.95 cm3
  • Capacity 22kw a 11500 rpm
  • Max torque 19.6 nm a 10000 rpm
  • Max rpm 13800 rpm
    (electronically rev. Limited)
  • Carburetor dell'orto d.30
  • Or with diaphragm
  • Fuel pump dell'orto
  • Exhaust system exhaust with intake silencer
  • Drive centrifugal dry clutch



ROK is a 125cc single-cylinder 2 stroke engine by Vortex, with reed valve admission in the crankcase. It is mixturelubricated and liquid-cooled with integrated water pump.
It has got a digital ignition and an integrated electric starter, which the battery is dedicated to. It is provided with a balancer shaft, which reduces the vibrations.
A centrifugal dry clutch makes it possible to keep the engine on even when the kart is still.





  • Bore 54.07mm
  • Stroke 54mm
  • Displacement 123.99 cm3
  • Capacity 26.5 kw a 12500 rpm
  • Max. Torque 20.2 nm a 11500 rpm
  • Max. Rpm 16700 rpm
  • Carburetor Dell'orto d.30
  • Fuel pump Dell'orto
  • Intake silencer arrow
  • Exhaust system exhaust with
  • Integrated silencer
  • Drive centrifugal dry clutch
  • Engine oil high quality oil for 2 strok
  • Engine mixed at 6%
  • Weight of engine –˜15 kg


Reed valve engine 125cc, electrical starter, with balancer shaft, liquid-cooled through integrated pump, supplied complete of carburettor Dell'Orto VHSB Ø 30 mm, fuel pump, exhaust muffler, radiator with supports, thermostatic valve, connector and cooling system pipes, on-off push-button panel, battery, battery support, electric plant, intake silencer, with a REV limited at 15.000 rpm.


  • Single-cylinder 2 stroke direct-drive engine
  • Read valve intake in the crankcase
  • Displacement 125cc
  • Bore and stroke 54 x 54mm
  • Iron made cylinder and exhaust valve
  • 5 / 3 transfer ducts system
  • Oval exhaust with 2 boosters
  • L Segment
  • 38 Hp at 11.000 rpm
  • Max 16.000 rpm
  • Selettra analogic ignition
  • External pump liquid cooled system
  • Ibea carburettor
  • Mixture-lubricated
  • Push-to-start system with decompression valve  
  • Centrifugal dry clutch
  • Exhaust system with intake silencer


As always the Rok Cup looks ahead and once again gives us an engine that looks to the future, and races directly into it.
The newcomer in the Rok family is called DVS; it is direct drive (no clutch), lightweight, powerful and reliable.
The Rok DVS gives indescribable and unique driving sensations, pushing the limits of fun and challenge higher and higher.
Only one major manufacturer, with many years of experience and as successful as Vortex, is able to achieve such a project.
The DVS does not require any special effort to be started, in fact, it is a simple direct drive 125cc engine and with a gentle push, you squeeze the decompression valve on the cylinder head and you are done! The kart moves forward and the DVS engine is ready to enter the track.
This starting system, combined with other technical solutions, such as the water pump, keeps the DVS true to the philosophy that has made the success of the Rok Cup; ease of management and ease of use.


  • Single-cylinder 2 stroke engine with six-speed gearbox
  • Displacement 125 cc
  • Cast iron liner
  • 43 Hp at 13900 rpm
  • PVL analog ignition
  • Mixture-lubricated
  • External pump liquid cooled system
  • Dell’Orto carburetTor 30mm diameter
  • Intake reed valve in the crankcase
  • Number of transfer ducts: 5/3
  • Bore-stroke 54 x 54,5 m
  • Front clutch gear shift
  • Dry clutch
  • Oval exhaust with 2 boosters
  • C4 radial-bearings
  • ONE-PIECE Rok exhaust


By the arrival of the new Rok Shifter, the Rok engine family is enriching. The new gear box engine completes the extraordinary Rok engine range.
Rok Shifter comes to the light to accomplish the needs of those several drivers who wish to compete in a category with the gear box, in a well-known and very well managed championship such as the Rok Cup, facing affordable expenses and steady regulations in the time. Rok Shifter engine comes from the long standing and winning Vortex experience in the field with the two-stroke-kart engines and just after the many times winning RVXX 125 engine.
Rok Shifter has been conceived and realized with the aim of starting a dedicated championship, the Rok Cup Shifter, where all drivers will compete by means of this precious jewel made in Vortex, mounted on chassis of different brands. With a displacement of 43 HP, the Rok Shifter is the best engine offering good performances and operating costs.



  • Bore 54.05 mm
  • Stroke 54 mm
  • Displacement 123.9 cc
  • Capacity 22 kw a 13000 rpm
  • Max torque 16.5 nm a 11000 rpm
  • Max rpm 16000 rpm
  • Carburetor ø 24 with diaphragm
  • Intake silencer arrow
  • Exhaust system exhaust with intake
  • Silencer
  • Drive centrifugal dry clutch
  • Weight of engine –˜13.5 kg

ROK TT is a Vortex 125cc single-cylinder 2 stroke engine, with reed valve admission in the crankcase.
Mixture lubrication and liquid cooling with external circulation pump.
The ignition is analogic and the starter is electric with battery exclusively dedicated to this function.
It is equipped of dry centrifugal clutch that permits to keep the engine on even not running.