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.21 Engines Off Road
> O.S. Speed B21 Adam Drake Edition Engine (Combo)
O.S. Speed B21 Adam Drake Edition Engine (Combo)
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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.
Speed Tuned B21 Adam Drake Limited Edition Buggy and Truggy Engine
O.S. T-2090SC Exhaust System
21J3(B) Carburetor with 6.5 and 8mm Carb Reducers
O.S. Speed P3 Gold Glow Plug
3mm, 16mm and 18mm Dust Caps
Exhaust Seal Ring
Exhaust timing is 2 degrees higher than previous B2101 for greater top speed
21J3(B) slide valve carburetor with 6.5 and 8mm Carb Reducers suitable for buggy and truggy use
Silicone filled crankshaft with DLC (diamond like coating) with two balanced tungsten weights and optimal intake timing for a smoother power transition from low-mid-high speeds
Special cylinder head in black with Adam Drake graphics in white
Newly designed three-port cylinder liner
: 0.213 cu in (3.49cc)
: 0.646" (16.4mm)
: 0.652" (16.55mm)
: 4,000-42,000 RPM
: 2.65PS 34,000 RPM, 2.61HP @ 34,000RPM
: 12.45oz (353g)
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