Speed B2101 Engine

Speed B2101 Engine

Podium power for 1/8 scale buggies

O.S. holds the record for most IFMAR 1/8 Scale World Championship wins of any brand. That record continued in 2014 when Ty Tessmann powered to the IFMAR Worlds podium with the O.S. Speed B2101, paired with the performance-boosting T-2090SC Tuned Pipe.

The B2101 delivered for Ty. And its advantages can also be yours.

They include faster acceleration off the starting line and out of corners...a low CG for stability and predictable handling...and throttle response so immediate, the power seems to flow right from your fingers.

Top drivers everywhere choose O.S. to dominate in local, regional and national competitions. The factory-tuned, fiercely reliable B2101 is ready to put you on the podium, too.

[ Click here for a review by NeoBuggy ]



Ty Tessmann
"I compete in major races all over the world, in all kinds of conditions. Many things can go wrong, but I never worry about my O.S. engines. They're powerful, driveable and consistent."

– Ty Tessmann, 2014 IFMAR 1/8 Scale Off-Road World Champion


  • Specifications
  • Parts Listing
  • Accessories
  • Gallery
Stock Number: OSMG2045
Displacement: 0.211 cu in (3.46 cc)
Bore: 0.646 in (16.40 mm)
Stroke: 0.646 in (16.40 mm)
Practical RPM: 4,000-42,000
Output: 2.61 hp @ 34,000 rpm
Weight: 12.42 oz (352 g)
Includes: 21J carburetor; 6 mm and 6.5 mm carb reducers; P3 Turbo glow plug; dust cap set (3 mm, 16 mm and 18 mm); exhaust seal ring
Requires: Glow fuel, T-2090SC Tuned Silencer Set

Primary Accessories

Stock Number Mfr Number Product Description Quantity Needed
 DTXP0300   DTXP0300  Duratrax Glow Starter C Battery 1
 FUGP4202   4200BP2  Fuji Batteries C Alkaline Battery (2) 1
 MSFG1660   151660  Motor Saver 1/8 Off-Road Truck Filter 1
 ODOP3320   ODOP3320  O'Donnell 20% Racing Quart 1

Field Equipment

Stock Number Mfr Number Product Description Quantity Needed
 HCAP2550   HCAP2550  Hobbico 4-Way Wrench w/Plug Storage 1

Optional Accessories

Stock Number Mfr Number Product Description Quantity Needed
 DTXP0125   DTXP0125  Duratrax Kwik-Pit 250cc Fuel Bottle 1
 DTXP0150   DTXP0150  Duratrax Kwik-Pit 500cc Fuel Bottle 1
 DTXR0185   DTXR0185  Duratrax Engine Tuning Screwdriver 1
 DTXR0187   DTXR0187  Duratrax Engine Tuning Tool 1
 GPMQ4131   GPMQ4131  Great Planes Silicone Fuel Tubing Standard 3' 1
 HCAP3001   HCAP3001  Hobbico After Run Engine Oil 2 Fl Oz 1
 ODOP3220   ODOP3220  O'Donnell 20% Racing Gallon 1
 ODOP3320   ODOP3320  O'Donnell 20% Racing Quart 1
 OSMG2393   72413200  O.S. 203 Filter Elements (4) 1
 OSMG2648   71812000  O.S. Hyper Flywheel Set Mugen 28XZ 1
 OSMG2649   71813000  O.S. Hyper Flywheel Set Kyosho 28XZ 1
 OSMG2697   71641400  O.S. P4 Turbo Plug Super Hot Off-Road 1
 OSMG2938   72106135  O.S. T-2060SC WN Tuned Pipe Complete Set 1
 OSMR2976   71521000  O.S. Long Socket Wrench With Plug Grip 1