O.S. SPEED R2104

O.S. SPEED R2104 is a factory tuned engine solely developed for 1/8 racing competition. The new engine boasts 9-port piston liner to improve torque in low-middle power range. It produces enough power as designed even in high traction tracks. The redesigned crankshaft counter weight enables smooth power transition from low to top. Distance of each fin of the heat sink head is enhanced for better air flow for cooling and better balance. The heat sink head is anodized in two colors; black and red.

Specification

Displacement： 3.49cc / 0.213 cu.in.
Bore: 16.08mm/0.633in.
Stroke: 17.20mm/0.677in.
Output 2.8ps/2.76hp/35,000r.p.m
Practical r.p.m.Range: 4,000-45,000 r.p.m.
Weight: 340g / 11.99oz

• Cylinder liner

  

  The new engine boasts 9-port piston liner to improve torque in low-middle power range. It produces enough power as designed even in high traction tracks.

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  Outer head

  

  Distance between the cooling fins is enhanced for better air flow and better balance. The heat sink head is anodized in two colors; black and red.

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  Inner head

  

  An silicon O-ring fit to the inner head prevents dust from coming into the engine.

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  Crankshaft

  

  The redesigned crankshaft counter weight enables smooth power transition from low to top.

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  Carburetor

  

  The carburetor is 21M2(B), which has been proved to be consistent and reliable for generations (R2101, 2102, 2103)