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OS Speed 21 B2102 Engine - 1/8 Buggy off road

Rp 0

Item No: 1A300 - RC Car Nitro Engine

Lower Center of Gravity & Better Fuel Consumption!

  • The new low-profile cooling head (17mm lower than that of B2101) creates much lower car's center of gravity, which drastically improves car handling without sacrificing cooling performance.
  • The newly designed carburetor also improves fuel mileage. Ten-minute drive per fuel tank is not just a privilege for the top drivers anymore.
  • Newly developed parts for B2102: carburetor, crankshaft, crankcase, inner head, and outer head

Displacement: 0.211 cu (3.46 cc)
Bore: 0.646 in (16.40 mm)
Stroke: 0.646 in (16.40 mm)
Practical RPM: 4,000-42,000
Power Output: 2.65 PS/2.61 hp @ 34,000 rpm
Crankshaft Size: UNF1/4-28
Distance/Mounting Hole Centers Same Side: 0.83" (21mm)
Distance/Mounting Hole Centers Opposite Side: 1.45" (37mm)
Width of Crankcase below Mounting Tabs: 1.2" (31.6mm)
Width of Mounting Tabs: 1.8" (45mm)
Height/Mounting Tab to top of Cylinder Head: 2.6" (65.9mm)
Height/Mounting Tab to center of Exhaust Outlet: 1.1" (28mm)
Height Crankcase Bottom to top of Cylinder Head: 3.2" (81.5mm)
Length of Crankshaft end to Front Bearing: 1.2" (29.5mm)
Length of Crankshaft end to Backplate: 3.7" (94mm)
Length of Crankshaft end to Center of Crankcase: 2.9" (73.5mm)


  • O.S. Engines Speed B2102 Engine with P3 Turbo Glow Plug
  • 6.5mm Carburetor Reducer in Red
  • Exhaust Seal Ring
  • One each 3mm, 16mm and 18mm Dust Caps
  • Instruction Manual

Carburetor Settings: (Carburetor is preset from factory and should only require very small adjustments)
Needle Valve: 3 turns open from fully closed
Mixture Control Valve: One turn screwed in from flush position with carb body
Metering Needle: 0.3-0.4mm protruding from flush position with carb body
Throttle Stop Screw: Approximately 0.5mm from carb body when viewed from above

Here is Ty Tessmann's OS powered HB D815 V2 at 2016 IFMAR Las Vegas (courtesy of NeoBuggy). The cooling head is nicely flushed almost under the body.

According to Ty Tessmann, prior to IFMAR event he has been testing this new engine for a few months and says that there is no difference in engine temperature but the handling difference is quite large. The car is more predictable in the high speed corners as it doesn’t dive upon turn in.

*Pic courtesy of NeoBuggy