O.S. SPEED R2104
-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.
-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.
-An silicon O-ring fit to the inner head prevents dust from coming into the engine.
-The redesigned crankshaft counter weight enables smooth power transition from low to top.
-The carburetor is 21M2(B), which has been proved to be consistent and reliable for generations (R2101, 2102, 2103)
SpecificationDisplacement: 3.49cc / 0.213 cu.in.
Practical r.p.m.Range: 4,000-45,000 r.p.m.
Weight: 340g / 11.99oz