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.21 7+3 Port Engine World Series 9

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Many times World Champion, the World Series is back in a brand new 09 version. RB made this engine even more adapted to the Off Road class needs by adding the Multi Exhaust System. The strength of the WS9 engine is its smooth from low RPM, making this very high level engine reachable to all.

  • Very high level racing engine
  • 7 ports + 3 Multi Exhaust System (MES)
  • Turbo combustion chamber
  • 13 mm main bearing and double rubber seal located on the front side of the front ball bearing
  • Nylon 9 mm carburettor with 6, 7 & 8 mm Venturi included
  • Light Off Road L2G cooling head (17g lighter)
  • Dust protection caps for carburettor, exhaust, fuel intake and top of the crankshaft
  • Contents: 3.49 ccm
  • Bore: 16.42 mm
  • Stroke: 16.42 mm
  • Porting intake: 7
  • Porting exhaust: 3 MES
  • Crankshaft: 13mm Bi-Turbo+Concept Coating (square stroke)
  • Carburetor: Slide Composite 9 mm with removable Venturi 6, 7, 8 mm (included)
  • Glowplug: Turbo
  • Weight: 348 g

Manufacturer: RB Concept (RB01009-WS9)

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