Two New Engines From Vortex


  25 October 2014
 

Vortex introduced two new engines to karting on the Wednesday of the Rok Cup at Sarno - the Rok Micro and Rok DVS. Tony Kart's new KZ World Champion, Marco Ardigò, along with second place Flavio Camponeschi, were first to sample the new 38hp DVS - as was one lucky Aussie...

 

ROK DVS

Being direct drive (no clutch), some might think the DVS is a step backward as it goes away from the current 'standard' TaG concept.

While the 125cc DVS has no starter (so requires no battery or wiring loom), it does not need the kart to be lifted to start the motor as it incorporates a decompression valve in the cylinder head. Simply hold the valve button down and one person can gently push the kart until it fires and drives away.

This would appear to be a partial return to what karting is all about - a simple and lightweight engine that provides maximum driving enjoyment.

First Australian to drive the new Rok DVS from Vortex, Stable Karting's Joshua Fife
Above: First Australian to drive the new Rok DVS from Vortex, Stable Karting's Joshua Fife
pic - Stable Karting/facebook

Specs from Vortex (published as found - the kart is clearly direct drive and was push started from stationary, despite saying below "Centrifugal dry clutch")

  • 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

MICRO ROK

Vortex also revealed the Micro Rok "designed to meet the wide audience of the young drivers who wish to become true Rokkers... It has an adequate yet appropriate performance level according to the age of drivers to whom it is aimed (6 years and older)."

Specs from Vortex

  • 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

 

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