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Novarossi VIRTUS .21 On Road Engine (9 Ports) RBMods



  • Displacement: 3,49 cc
  • R.P.M. (max power): 41.000 RPM
  • RPractical range: 6.000-46.800 R.P.M.
  • Bore x stroke: 15,88x17,60mm
  • Sleeve: 9 ports
  • Rear ball bearings:steel
  • Front ball bearings:steel
  • Crankshaft: 14,5 mm - tuned - turbo
  • Carburetor: aluminium - 9 mm - slide
  • Glowplug: Turbo (C8TGH)
  • Exhaust position: rear
  • Weight: 336 g
In stock (10 items available)
  • $270.00
  • sale
    27% off
Old price: $370.00 , you save $100.00
  • 27% off
  • Bearings
  • Break In
  • Weight
    2.0000 lbs
  • SKU
The shifted carburetor grants a better mixture flow inside through the crankase's intake. This gives the engine an improved fuel efficiency and a better power curve.

  Rear ball bearings:
The new ball bearing reduces the inertia of the rotating masses and increases the engine's scavenging. You can see both the ball bearing and the manufacturing process result in the picture above. These novelties give an
increased throttle response and a higer top speed.

This a 'Lighter&Lower evolution 3' type of cooling head. It is drilled and milled out to reduce the mass of the coolinghead which sits high up in the car and thereby lowering the Center of Gravity of the engine/car. The use
of 6 screws instead of 4 ensures a better sealing between sleeve, botton head and the crankcase.


The new crankshaft gives the engine a better balancing. This will reduce the vibration produced by the Rotating and the alternating masses.

The sleeve has 9 transfer ports and an exhaust with booster ports. The special shape and positioning of the ports, covered by a patent, improve the internal fluid-dynamics to obtain the maximum possible performance.
  Rear cover:
The rear cover presents a round shape to optimize the filling and reducing the dead spaces. the steel plate is to reduce friction and to expand the lifespan of the conrod.

The R7 conrod is made from a superlight alluminium which has been checked ultrasonic. The specific form of the R7 creates little turbulence inside the engine while running.

The inner shape of the gasket has a new shape, and with that more material. Together with a change in material these gaskets are more resistant to high temperatures.
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