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O.S. 21XR-B ver.III 1CY00


O.S. 21XR-B ver.III

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164,48 €


161,25 €

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The O.S. 21XR-B Ver.2 club-level nitro GT and off-road engine.
The power plant targets club level drivers and it features the 21J3 3-needle carburettor with 7mm and 8mm venturi inserts.

Tech specifications:

  • Displacement: 3.49 cc
  • Bore: 16.27mm
  • Stroke: 16.80mm
  • Intake ports: 3-port
  • Practical RPM range: 4,000 – 40,000 rpm
  • Max. power output: 2.42 hp / 34,000 rpm
  • Weight: 380Gr


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