- Produktinformationen
- Displacement: 3.49cc
- Bore: 16.27mm
- Stroke: 16.80mm
- Output: 2.64 hp @ 34.000r.p.m.
- Practical rpm range: 4.000-42.000
- Weight: 352g
- Glow plug T-P3
- Reducer Venturi: 6 & 6.5mm
- Exhaust seal ring
- Dust cap set: 3, 16 & 18mm
O.S.SPEED B2104 Off-Road Racing Engine
O.S.SPEED's off-road racing engine has evolved further. The 4th generation of the B21 series, the "B2104" has improved low-speed response as a result of securing the power to gain an advantage in harsh off-road racing scenes and pursuing a driving feel that steadily demonstrates performance in any situation. Achieves smooth and torqueful performance at medium and low speeds. This has evolved into an off-road engine that perfectly synchronizes with the movement of the fingertips from idling to the highest rpm range. Condensing the know-how of OS SPEED on the whole body, we will continue to make the legend of the off-road racing scene again. It is a long-stroke engine, bore x stroke is 16.27 x 16.80mm. It has quicker response in low range and more torque in middle range with consistent idling.
New Piston/Liner Set
The new piston/liner is conventional 3-port type enabling more torque over the power range.
New DLC Coated Crankshaft
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.
New Case Cover Plate
The thrust plate with surface treatment embedded in the cover plate reduces friction against a connecting rod to extend its life.
Optimized Flow
The boost port and the exhaust port of the crankcase are redesigned for optimum air flow.
Proven Carb
The carburetor is trustable 22E type, which we have been using for B2103 Type R.
Cooling Head
The cooling head is conventional round-shape type with standard height.
Specs:
Standard accessories:- Features
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: 2024-04-23 - Teile
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- Reservdelar (71)
![Connecting Rod Speed B2101,B2104, 21ZX-B]()
Art.nr.:Lagerbestand:28 stVerkaufspreis 564 kr
![Oring (S) 10D, 10F, 1H-3H, 20E, 40B, 40J]()
Art.nr.:Lagerbestand:29 stVerkaufspreis 74 kr![Cover Plate Gasket 21XZ, 21RX-B Ver.3,30VG, 35AX,B2104]()
Art.nr.:Lagerbestand:31 stVerkaufspreis 117 kr![Needle 21C, 21E, 21F, 21J, 20E, 20B, 20A]()
Art.nr.:Lagerbestand:3 stVerkaufspreis 144 kr![Ball Bearing Rear Ceramic Speed 21V-Spec]()
Art.nr.:Lagerbestand:0 stVerkaufspreis 1269 kr![Carburettor Gasket 20E, 7D, 60F, 60MC, 70D]()
Art.nr.:Lagerbestand:19 stVerkaufspreis 74 kr![Piston Pin Retainer SPEED (6) 21XR-B Ver.3]()
Art.nr.:Lagerbestand:10 stVerkaufspreis 117 kr![Inner Head For B21 1/8 Off-Road 16% Nitro]()
Art.nr.:Lagerbestand:2 st2025-01-17Verkaufspreis 581 kr![Carburettor Complete 22E(B) w/o Reducer]()
Art.nr.:Lagerbestand:1 stVerkaufspreis 1729 kr![Combustion Chamber with O-Ring SPEED B2104]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 650 kr![Carburettor Reducer 6mm (Red) O.S.SPEED 21]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 190 kr![Carburettor Reducer 6.5mm (Röd) O.S.SPEED 21]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 190 kr![Carburettor Reducer 9mm (Red) Alu]()
Art.nr.:Lagerbestand:2 st2025-01-31Verkaufspreis 190 kr![Tuned Silencer Complete Set T-2060SC WN]()
Art.nr.:Lagerbestand:1 stVerkaufspreis 2161 kr![Exhaust Manifold Assembly MB01-75 (M2000SC)]()
Art.nr.:Lagerbestand:4 stVerkaufspreis 663 kr![Exhaust Manifold Assembly MB01-80 (M2002SC)]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 663 kr![Exhaust Manifold Assembly MR01-85 (M2004SC)]()
Art.nr.:Lagerbestand:7 stVerkaufspreis 663 kr![Exhaust Manifold Assembly MR01-90 (M2005SC)]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 663 kr![Tuned Silencer Complete Set T-2100SC]()
Art.nr.:Lagerbestand:4 st2025-01-17Verkaufspreis 2161 kr
- Reservdelar (71)
- Beliebtes Zubehör
![Exhaust Seal Ring O.S. Speed 21 (10)]()
Art.nr.:Lagerbestand:4 st2025-01-17Verkaufspreis 319 kr![Inner Head For B21 1/8 Off-Road 16% Nitro]()
Art.nr.:Lagerbestand:2 st2025-01-17Verkaufspreis 581 kr![Phillips Screw Driver 4.0x120mm O.S.SPEED]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 301 kr![Phillips Screw Driver 5.8x120mm O.S.SPEED]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 301 kr![Clutch System Off-Road 4-Shoe O.S.SPEED]()
Art.nr.:Lagerbestand:1 stVerkaufspreis 1413 kr![Kupplungsbacken (B) Alu Standard (Gelb) (4) O.S. Speed]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 506 kr![Clutch Shoe (B) Hard (Black) (4) O.S.SPEED]()
Art.nr.:Lagerbestand:2 stVerkaufspreis 506 kr- Downloads
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