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Authorized Vortex ROK Engine Dealer - Kart Racing Engines
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Vortex ROK Engines
2-Stroke Kart Racing Engines, ROK Cup USA

ROK Mini/Micro | ROK VLR 100cc | ROK GP TaG | ROK Shifter

Vortex EnginesWORD Racing is pleased to be an Authorized Vortex dealer for ROK Engines & Parts. The Vortex Factory, part of the OTK Kart Group, has been the leader in producing World Championship winning engines thorugh innovation, research, technology, and experience. Multi-time winners of the FIA Karting World Championship, including KZ, and KZ2 (Tony Kart) in 2018.

The ROK engines, as used in the ROK Cup USA, have you covered for all your karting needs. High performance and quality, at an affordable price. The Mini/Micro for kids ranging from 7 to 12 years of age, the VLR providing the best bang for the buck in karting with it's 22 hp air-cooled 2-stroke, the incredibly fast GP TaG engine wtih power-valve, and of course the 43 hp 6-speed Shifter for the ultimate karting experience.

 

ROK VLR - Complete Engine Package

Vortex ROK VLR 100cc Air-Cooled TaG kart racing engine
ROK VLR 100cc Air Cooled

Vortex ROK VLR Engine Package -- $1550.00
*No sales tax
*Please contact us for shipping costs
*Also contact us if Junior restrictor is needed

Choose Will Call or Ship

Building upon the successful line-up of Vortex ROK engines, ROK Cup Promotions has launched the brand new Vortex ROK VLR. The perfect platform 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. Also, for racers that want to update their current 100cc to a state-of-the-art engine package, this engine covers it all.

The new ROK VLR engine retails for $1550 USD, and comes complete, ready to race minus the engine mount. Approved for the O2s Championship series.

Technical Specifications

    • Engine Type: single-cylinder 2 stroke air-cooled
    • Bore: 48 mm
    • Stroke: 54 mm
    • Displacement: 100 cc
    • Carburetor: Butterfly valve 24mm
    • Inlet System: reed valve
    • Lubrication: oil mixture 4% to 6% (24:1 to 16:1)
    • Ignition System: Selettra analogic ignition
    • Starting: integrated electrical starter
    • Transmission: dry centrifugal clutch
    • Power: Not published, but estimated around 22 Hp
    • Engine Weight: 45 lbs (approx 11 lbs lighter than the average water-cooled 125 TaG)

ROK VLR Documentation

Mini ROK 60cc TaG - Complete Engine Package

Vortex ROK Mini/Micro 60cc Cadet Kart Racing Engine
Mini ROK 60cc TaG

Vortex ROK Mini/Micro 60cc TaG Cadet Engine Package -- $1450.00
*No sales tax
*Please contact us for shipping costs

Choose Will Call or Ship

The Mini ROK engine is aimed at the younger generation of kart drivers, and is used for the Mini ROK class and Micro ROK class (with restrictions, see below).Thanks to some of its key features it is safe and easy to use, so that young drivers can become familiar with the kart without tension.

The engine has the following features: Single-cylinder 2 stroke engine, displacement 60cc, piston port. Air-cooled, equipped with centrifugal dry-clutch and integrated electrical starter.

The engine comes in two configurations, bare engine or in a complete kit with  Dell’Orto PHBG Ø 18mm carburettor, Dell’Orto fuel pump, Vortex intake silencer and exhaust with integrated exhaust silencer, starter complete with battery and battery support.

Mini Rok engine is aimed at the younger generation and for more than a decade has spread worldwide, therefore more and more federations have chosen it as national entry level category.

Micro ROK engine restrictions: spec gear (82); spec jet (95); restricted exhaust header. See the ROK Cup USA Rulebook for complete rules and regulations concerning engines for a particular class.

Technical Specifications

    • Engine Type: single-cylinder 2 stroke
    • Bore: 42 mm
    • Stroke: 43 mm
    • Displacement: 60 cc
    • Carb. Model: Dell’Orto PHBG Ø 18mm carburettor
    • Lubrication: oil mixture
    • Ignition System: Selettra analogic ignition
    • Transmission: dry centrifugal clutch
    • Cooling System: air cooled
    • Starting: on-board electric starter
    • Max RPM: 15,500 (10 HP at 11,000 rpm)

Mini ROK Documentation

ROK GP 125cc TaG - Complete Engine Package

Vortex ROK GP TaG Kart Racing Engine
ROK GP 125cc TaG

Vortex ROK GP 125cc TaG Engine Package -- $2600.00
*No sales tax
*Please contact us for shipping costs

Choose Will Call or Ship

The ROK GP engine is the next step in the Vortex engine line, and is used in the Senior and Master classes ROK and Junior ROK Class (with restrictions, see below).

Rok GP 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.

The engine has the following features: Single-cylinder 2 stroke engine, displacement 125cc, reed valve intake in the crankcase.  Liquid-cooled through integrated pump, equipped with centrifugal dry-clutch and  integrated electrical starter.  It is also equipped with a balance shaft that reduces vibrations and power valve that improves performance and driveability at low rpm.

The engine comes in two configurations, bare engine or in a complete kit with Dell’Orto VHSH Ø 30mm carburettor, Dell’Orto fuel pump, Arrow intake silencer, moulded exhaust and exhaust with integrated exhaust silencer, wire loom complete with battery and battery support.

True to the philosophy that favours ease of use and management, Rok Gp engine is aimed at all drivers who want to test themselves on a spirited and performing chassis.

Junior ROK engine restrictions: restricted exhaust header. See the ROK Cup USA Rulebook for complete rules and regulations concerning engines for a particular class.

Technical Specifications

    • Class: 125cc - Stock Shifter Class TaG
    • Description: Single Cylinder – 2 stroke
    • Bore: 54 mm
    • Stroke: 54.40 mm
    • Displacement: 125 cc
    • Inlet System: Reed valve
    • Lubrication: 4% to 6% oil mixture
    • Ignition System: PVL digital ignition
    • Cooling System: Water cooled
    • Balancer Shaft: Present
    • Power Valve: Present
    • Starter: On board electric starter
    • Carb. Model: Dell’Orto VHSH Ø 30mm carburettor
    • Dry Weight: 54 lbs
    • Max Power: 36 HP at 12.500
    • Max Torque: 20.2 Nm at 11.500 rpm
    • Max RPM Limit: 15.000 rpm (electronically limited)

 

ROK Shifter 125cc - Engine Package

Vortex ROK Shifter Kart Racing Engine
ROK Shifter 125cc

Vortex ROK Shifter Engine Package -- $3600.00
*No sales tax
*Includes motor mount, but does not include radiator, water pump, hoses, etc.
*Please contact us for shipping costs

Choose Will Call or Ship

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 in two configurations: bare engine or in a complete kit with Dell’Orto VHSH Ø 30mm carburettor, Dell’Orto fuel pump, Arrow intake silencer, moulded 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.

See the ROK Cup USA Rulebook for complete rules and regulations concerning engines for a particular class.

Technical Specifications

    • Class: 125cc - Stock Shifter Class
    • Description: Single cylinder – 2 stroke
    • Bore: 54 mm
    • Stroke: 54 mm
    • Displacement: 125 cc
    • Inlet system: Reed valve
    • Lubrication: 4% oil mixture
    • Ignition system: PVL analogic ignition
    • Transmission: 6 speed gearbox/dry clutch
    • Cooling system: Water cooled
    • Dry Weight: 58 lbs
    • Carb. Model: Dell’Orto VHSH Ø 30mm
    • Max Power: 43 HP at 13.900
    • Max Rpm limit: 14.000 rpm

ROK Shifter Documentation

 

FAQ

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