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.
Supplied with:
-
ENGINE KIT Reed valve engine 125cc single-cylinder, liquid-cooled, six-speed gearbox.
- Dell'Orto Carburettor VHSH Ø30mm
- Dell'Orto fuel pump
- Intake silencer
- Exhaust with exhaust silence
-
Engine mount
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
{"id":8335591997718,"title":"Vortex ROK Shifter 125cc Engine Package","handle":"vortex-rok-shifter-125cc-engine-package","description":"\u003cp data-mce-fragment=\"1\"\u003eThe\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eRok Shifter engine\u003c\/strong\u003e was born to meet the needs of many drivers who want to compete in a \u003cstrong data-mce-fragment=\"1\"\u003ecategory with the gearbox\u003c\/strong\u003e, but always according to the Rok philosophy: low costs and steady regulations over the time.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe engine has the following features: Single-cylinder 2 stroke engine with\u003cstrong data-mce-fragment=\"1\"\u003e 6-speed gearbox with front clutch system, displacement 125 cc\u003c\/strong\u003e, 4 reed valve intake in the crankcase. Liquid-cooled through \u003cstrong data-mce-fragment=\"1\"\u003eexternal pump\u003c\/strong\u003e (not supplied in the kit).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe engine comes in two configurations: bare engine or in a complete kit with \u003cstrong data-mce-fragment=\"1\"\u003eDell’Orto VHSH Ø 30mm carburettor\u003c\/strong\u003e, Dell’Orto fuel pump, Arrow intake silencer, \u003cstrong data-mce-fragment=\"1\"\u003emoulded exhaust and exhaust silencer\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eReady for a \u003cstrong data-mce-fragment=\"1\"\u003epower of 43 HP\u003c\/strong\u003e, the Rok Shifter is the engine that provides the \u003cstrong data-mce-fragment=\"1\"\u003ebest combination of performance and operating costs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSee the\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/03\/Rule-Book-2017.1.pdf\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/03\/Rule-Book-2017.1.pdf\" target=\"_blank\"\u003eROK Cup USA Rulebook\u003c\/a\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efor complete rules and regulations concerning engines for a particular class.\u003c\/p\u003e\n\u003cp class=\"h2\"\u003eSupplied with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan dir=\"ltr\"\u003eENGINE KIT Reed valve engine 125cc single\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003e-\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003ecylinder, liquid\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003e-\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003ecooled, six\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003e-\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003espeed gearbox.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eDell'Orto Carburettor VHSH Ø30mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eDell'Orto fuel pump\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eIntake silencer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eExhaust with exhaust silence\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan dir=\"ltr\"\u003eEngine\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003emount\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp class=\"h2\"\u003eTechnical Specifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass\u003c\/strong\u003e: 125cc - Stock Shifter Class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDescription\u003c\/strong\u003e: Single cylinder – 2 stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore\u003c\/strong\u003e: 54 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke\u003c\/strong\u003e: 54 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement\u003c\/strong\u003e: 125 cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet system\u003c\/strong\u003e: Reed valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLubrication\u003c\/strong\u003e: 4% oil mixture\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition system\u003c\/strong\u003e: PVL analogic ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission\u003c\/strong\u003e: 6 speed gearbox\/dry clutch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling system\u003c\/strong\u003e: Water cooled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry Weight\u003c\/strong\u003e: 58 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarb. Model\u003c\/strong\u003e: Dell’Orto VHSH Ø 30mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Power:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e43 HP at 13.900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Rpm limit\u003c\/strong\u003e: 14.000 rpm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp class=\"h2\"\u003eROK Shifter Documentation\u003c\/p\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/03\/SHIFTER-Rok-2017-USA_web012.pdf\" target=\"_blank\"\u003eTech Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/02\/shifter-seals.pdf\" target=\"_blank\"\u003eEngine Seal Diagram\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2018\/01\/manuale-shf-Ing-compressed.pdf\" target=\"_blank\"\u003eROK Shifter Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e","published_at":"2023-06-20T13:04:03-07:00","created_at":"2023-06-20T13:04:03-07:00","vendor":"Vortex","type":"Engine","tags":[],"price":431460,"price_min":431460,"price_max":431460,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":45010082496790,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"","requires_shipping":true,"taxable":false,"featured_image":null,"available":true,"name":"Vortex ROK Shifter 125cc Engine Package","public_title":null,"options":["Default Title"],"price":431460,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.wordracing.com\/cdn\/shop\/files\/ROK-Shifter.jpg?v=1687291445"],"featured_image":"\/\/www.wordracing.com\/cdn\/shop\/files\/ROK-Shifter.jpg?v=1687291445","options":["Title"],"media":[{"alt":null,"id":33916953854230,"position":1,"preview_image":{"aspect_ratio":1.045,"height":287,"width":300,"src":"\/\/www.wordracing.com\/cdn\/shop\/files\/ROK-Shifter.jpg?v=1687291445"},"aspect_ratio":1.045,"height":287,"media_type":"image","src":"\/\/www.wordracing.com\/cdn\/shop\/files\/ROK-Shifter.jpg?v=1687291445","width":300}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp data-mce-fragment=\"1\"\u003eThe\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eRok Shifter engine\u003c\/strong\u003e was born to meet the needs of many drivers who want to compete in a \u003cstrong data-mce-fragment=\"1\"\u003ecategory with the gearbox\u003c\/strong\u003e, but always according to the Rok philosophy: low costs and steady regulations over the time.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe engine has the following features: Single-cylinder 2 stroke engine with\u003cstrong data-mce-fragment=\"1\"\u003e 6-speed gearbox with front clutch system, displacement 125 cc\u003c\/strong\u003e, 4 reed valve intake in the crankcase. Liquid-cooled through \u003cstrong data-mce-fragment=\"1\"\u003eexternal pump\u003c\/strong\u003e (not supplied in the kit).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe engine comes in two configurations: bare engine or in a complete kit with \u003cstrong data-mce-fragment=\"1\"\u003eDell’Orto VHSH Ø 30mm carburettor\u003c\/strong\u003e, Dell’Orto fuel pump, Arrow intake silencer, \u003cstrong data-mce-fragment=\"1\"\u003emoulded exhaust and exhaust silencer\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eReady for a \u003cstrong data-mce-fragment=\"1\"\u003epower of 43 HP\u003c\/strong\u003e, the Rok Shifter is the engine that provides the \u003cstrong data-mce-fragment=\"1\"\u003ebest combination of performance and operating costs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSee the\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/03\/Rule-Book-2017.1.pdf\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/03\/Rule-Book-2017.1.pdf\" target=\"_blank\"\u003eROK Cup USA Rulebook\u003c\/a\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efor complete rules and regulations concerning engines for a particular class.\u003c\/p\u003e\n\u003cp class=\"h2\"\u003eSupplied with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan dir=\"ltr\"\u003eENGINE KIT Reed valve engine 125cc single\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003e-\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003ecylinder, liquid\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003e-\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003ecooled, six\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003e-\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003espeed gearbox.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eDell'Orto Carburettor VHSH Ø30mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eDell'Orto fuel pump\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eIntake silencer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan dir=\"ltr\"\u003eExhaust with exhaust silence\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan dir=\"ltr\"\u003eEngine\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan dir=\"ltr\"\u003emount\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp class=\"h2\"\u003eTechnical Specifications\u003c\/p\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass\u003c\/strong\u003e: 125cc - Stock Shifter Class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDescription\u003c\/strong\u003e: Single cylinder – 2 stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore\u003c\/strong\u003e: 54 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke\u003c\/strong\u003e: 54 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement\u003c\/strong\u003e: 125 cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet system\u003c\/strong\u003e: Reed valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLubrication\u003c\/strong\u003e: 4% oil mixture\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition system\u003c\/strong\u003e: PVL analogic ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission\u003c\/strong\u003e: 6 speed gearbox\/dry clutch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling system\u003c\/strong\u003e: Water cooled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry Weight\u003c\/strong\u003e: 58 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarb. Model\u003c\/strong\u003e: Dell’Orto VHSH Ø 30mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Power:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e43 HP at 13.900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Rpm limit\u003c\/strong\u003e: 14.000 rpm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp class=\"h2\"\u003eROK Shifter Documentation\u003c\/p\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/03\/SHIFTER-Rok-2017-USA_web012.pdf\" target=\"_blank\"\u003eTech Sheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2016\/02\/shifter-seals.pdf\" target=\"_blank\"\u003eEngine Seal Diagram\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rokcupusa.com\/wp-content\/uploads\/2018\/01\/manuale-shf-Ing-compressed.pdf\" target=\"_blank\"\u003eROK Shifter Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e"}
