O.S. Speed B21 Engine Adam Drake Edition
O.S. Speed B21 Engine Adam Drake Edition
O.S. Speed B21 Engine Adam Drake Edition
O.S. Speed B21 Engine Adam Drake Edition
O.S. Speed B21 Engine Adam Drake Edition
O.S. Speed B21 Engine Adam Drake Edition
Discontinued | This Item is No Longer Available

O.S. Speed B21 Engine Adam Drake Edition

Item No.
OS Engines - OSMG2066
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O.S. Speed B21 Adam Drake II Engine
O.S. Speed B21 Adam Drake II Engine
OSMG2084
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Designed to dominate.

Power your way to the podium with this special Speed B21 engine that's packed with upgrades from champion Adam Drake. It’s a terrific choice for trucks and buggies that delivers competition-caliber performance for demanding drivers. Featuring a semi-long stroke, this engine also boasts a DLC crankshaft with double tungsten counterweight and a redesigned cylinder lining with updated porting. Be ready for the big leagues with the Speed B21 Adam Drake Edition!
  • Designed and tested to Adam Drake's race-winning specifications.
  • Great for buggies and trucks.
  • Newly designed cylinder liner with new porting.
  • Newly designed DLC crankshaft with double tungsten counterweight.
  • New semi-long stroke.
  • 6.5 and 8.0 mm carburetor reducers.
  • Ceramic rear bearing.
  • 21J carburetor.
Adam Drake

“O.S. is passionate about winning and is the proven choice of champions. Working with the engineers at O.S. to develop the New B21 Adam Drake engine was amazing. Our goal was to provide customers with a configuration that is exclusive to O.S. and provides the power, run-time, and drivability to be used with both buggies and truggies. The B21AD uses the proven, easy-to-tune 21J carburetor, O.S. P3 Gold glow plug, ceramic rear ball bearing and lightweight cooling head. The DLC-coated crankshaft features two tungsten counterweights for smooth power delivery. If you're looking for the ultimate off-road engine that performs in both buggies and truggies, the O.S. Speed B21 Adam Drake is the engine for you!” — Adam Drake

Product Specs

Bore
0.65 in (16.4 mm)
Crankshaft Type
Threaded
Power Type
Glow
Plug Type
Speed P3 Gold Glow Plug
Stroke
0.65 in (16.55 mm)
Cylinders
Single
Product Width
1.77 in (45 mm) at mounting tabs
Total Weight
12.45 oz (353 g)
Displacement
0.213 cu in (3.49 cc)
Product Length
3.5 in (90 mm) from backplate to end of crankshaft
Product Height
3.2 in (81.5 mm)
RPM Range
4,000 - 42,000 rpm
Crankshaft Threads
UNF1/4-28