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This is the OS Speed B2103 Type R. This 5-stroke, long-stroke engine offers maximum power with high torque at medium-low revolutions. The crankcase, crankcase cover and carburetor have been specially designed for the Speed B2103 range. The crankshaft has the DLC treatment and is balanced with tungsten bushings that increases rotational inertia, improving its balance and giving the momtor more smoothness. The B2103 Type R has the same characteristics as the Type S with the exception of the cylinder head that in the Type S is low and in the Type R is standard and the shirt is 5 transfers instead of 3. It has an O-ring between the cylinder head and combustion chamber to reduce vibrations and protect the inside of the engine thanks to better tightness. The new 22D carburetor guarantees a better response and smoother acceleration.
Features:
This 5-transfer, long-stroke engine offers maximum power with high torque at medium-low revolutions.
The crankcase, crankcase cover and carburetor have been specially designed for the Speed B2103.
Type R spare parts are the same as Type S.
Standard cooling head.
The crankshaft has the DLC treatment and is balanced with two tungsten bushings that increases the smoothness of rotational inertia and improves its balance.
The 5 transfer sleeve and piston has been specially designed for this engine.
It has an O-ring between the cylinder head and the combustion chamber to reduce vibrations and protect the inside of the engine.
The new 22D carburetor guarantees a better response and smoother acceleration.
Recomended Glow Plug: O.S P3 Gold Glow Plug
Recomended Fuel: Nitrolux Fuel 25%
Specs:
Displacement: 3.49cc
Bore: 16.27mm
Stroke: 16.80mm
RPM Range: 4000-42000 rpm
RPM (max. power): 2.64hp/34000 rpm
Weight: 354gr
Exhaust: T2100SC
Sleeve: 5 ports