The crankcase, on which OS SPEED logo is engraved, has enough surface area for effective heat dissipation.
Type S 3– ports liner performs well at medium and low speed range
Type S has high vertical finned low-profile cooling head for improving the car drivability with low gravity
O.S. SPEED B2103 TYPE S is a factory tuned engine for 1/8 off-road competition, most parts of which are newly designed; carburetor, crankcase, piston/liner, crankshaft, and inner head. The cooling head is low-profile type, which has low-gravity center with high vertical fins, which contributes to efficient heat dissipation. To say nothing of improvement over its power performance, the inner head with silicon o-ring improves anti-vibration and dustproof performance. The new ball link of carburetor makes linkage adjustment easier.
Manufacturer # 1BN00
RPM Range 4,000 – 42,000
Bore 0.64 in (16.27 mm)
Power Type Glow
Stroke 0.66 in (16.80 mm)
Cylinder Type Type R 5-port
Engine (Only) Weight 12.42 oz (352 g)
Muffler Type Tuned Muffler
Crankshaft Threads UNF1/4-28
Displacement 0.213 cu in (3.49 cc)