Engine driven by worlds class driver Ryan Lutz. It's suitable for most 1/8 scale Buggy & Truggy.

This is a complete Ready To Run set of RC 1/8 scale 4WD buggy that powered by electric.

Required Battery to Operate: AA size 4pcs & Li-po 4S 14.8V (not included)

Specification:

This is a complete Ready To Run set of RC 1/8 scale 4WD buggy that powered by electric.

Required Battery to Operate: AA size 4pcs & Li-po 4S 14.8V (not included)

Specification:

Specification:

We realised that when designing a racing car, it is not only about how fast the car is, how much steering it has, or how much acceleration it has, but more about controlability and handling. We learned that we need to place more emphasis on the driver, and the experience of driving the car. The car should feel like it wants to be driven, and it should inspire confidence in the driver. After all we all race because we enjoy it, and we all want to win, so our goal is to make driving at your maximum pace, as much of an enjoyable experience as possible.

We are constantly developing our race cars in an effort to provide you with the best possible vehicles. We are updating our guides and articled regularly, so please do check back from time to time. We share what we learn with you, because we believe it helps us all enjoy RC Racing more!

Below you can read articles about the development process, as well as read articles about the setup and maintenance of your vehicle.

* BLACK Edition Explained applies to GREY eCar

* BLACK Edition Setup Guide applies to GREY eCar

* Setup Sheets

* 25 Hour Test

O.S. SPEED B21 Adam Drake Edition 3 is developed in collaboration with O.S. international team driver ADAM DRAKE, who is famous for his deep knowledge and sound technical advice.
By adopting a boost bypass processing for the crankcase, the engine runs more smoothly, and making it even easier to drive. ADAM DRAKE's image color, blue anodized aluminum is applied to the cutting part of the new outer head, and two-color anodized aluminum with new design is used to reduce weight and lower the center of gravity improving driving performance. You can choose two different carburetor restrictors, 6.5II for buggy and 7.5 mainly for truggy.

Spec:-
Displacement： 3.49cc / 0.213 cu.in.
Bore: 16.4mm / 0.646 in.
Stroke: 16.55mm / 0.652 in.
Output 2.65 ps / 2.61 hp / 34,000 r.p.m.
Practical RPM range: 4,000-42,000 r.p.m.
Engine Weight: 350g / 12.35oz

• By adopting a boost bypass processing for the crankcase, the engine runs more smoothly
• ADAM DRAKE's image color, blue anodized aluminum is applied to the cutting part of the new outer head, and two-color anodized aluminum with new design is used to reduce weight and lower the center of gravity improving driving performance.
• In addition, by adopting a cover plate with a built in thrust plate, wear due to interference between the connecting rod and the cover plate during rotation is reduced and engine life is improved.
• The inner head uses an O-ring to reduce vibration and improve dust resistance.
• Blue anodized restrictors, 6.5mm for buggy and 7.5mm for truggy comes standard.

O.S. has introduced the new OS Speed B2104, a long-stroke .21 offroad engine, featuring quicker response in the low range and more torque in the middle range, along with consistent idling. The new piston/liner is a conventional 3-port type enabling more torque over the power range, while the new crankshaft has DLC coating and two tungsten counterweights embedded in the crankshaft contributing to consistent idling and quick return to idle. The boost port and the exhaust port of the crankcase are redesigned for optimum airflow, while the rest of the engine remains familiar with the use of 22E type carburetor and conventional round-shape cooling head with standard height. Also available as part of a combo with the TB03 (T-2100, EFRA 2155) silencer with 80mm manifold.

Specifications

• Displacement:3.49cc / 0.213 cu.in.
• Bore:16.27mm / 0.641 in.
• Stroke:16.80mm / 0.661 in.
• Output:2.68 ps / 2.64 hp / 34,000 r.p.m.
• practical rpm range: 4,000-42,000 r.p.m. weight:352g / 12.42 oz.
• Standard accessories
• Glow plug T-P3 ・Reducer φ6Ⅱ、φ6.5Ⅱ・ Exhaust seal ring
• Dust cap set 12-30(φ3、φ16、φ18)

Features

• The new piston/liner is conventional 3-port type enabling more torque over the power range.
• The new crankshaft has DLC coating as we always do for OS SPEED engines. The two tungsten counterweights are embedded in the crankshaft contributing consistent idling and quick rpm down according to throttle move.
• The thrust plate with surface treatment embedded in the cover plate reduces friction against a connecting rod to extend its life.
• The boost port and the exhaust port of the crankcase are redesigned for optimum air flow.
• The carburetor is trustable 22E type, which we have been using for B2103 Type R.
• The cooling head is conventional round-shape type with standard height.