O.S. SPEED B21 Adam Drake 2 Off-Road /T2100SC Combo


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O.S.SPEED B21 Adam Drake Edition 2 – Off-Road Racing Engine Combo with T2100SC Exhaust

O.S.SPEED B21 ADAM DRAKE EDITION 2 is an evolution of the previous Adam Drake model that was born with the advice of world-class pro-racer Adam Drake from USA.


  • The Bore/Stroke ratio of the Drake-spec engines is 16.4×16.55mm and are unique to this engine (and it’s processor).
  • Newly designed crankshaft for further improved driving feeling (different tungsten balancing).
  • New updated combustion chamber that use an additional O-ring which reduce vibration and seals out most of the dirt that can accumulate around the sleevsd upper/outer edge.
  • The new carburetor also has its locking screw turned around 90 degrees so its much easier to reach/tighten.
  • Two carburetor venturi inserts are included: 6.5 & 7.0 mm
  • Also available without exhaust system


  • Stroke volume: 3.49 cc
  • Bore: 16.4 mm
  • Stroke: 16.55 mm
  • Output: 2.61 hp @ 34.000RPM
  • Practical RPM Range: 4.000 – 42.000
  • Weight: 353 g