O.S. Speed B2105 Competition .21 Nitro Engine w/Pipe Combo
About this part
Engine Overview:
The O.S.SPEED B2105 Off-Road Buggy Engine is designed for competitive buggy racing, offering enhanced power and drivability. Manufactured by O.S. Engines, this engine boasts a redesigned cylinder and liner with three ports, delivering greater torque from mid to high-end. The black and silver anodized cooling head ensures efficient heat dissipation, while the DLC-coated crankshaft and revised internal shape optimize both power characteristics and ease of use compared to previous models.
The O.S.SPEED B2105 also incorporates a double-seal front bearing for improved durability and stability. Inherited from the B2104 crankcase, the engine features ceramic bearings and a specially treated thrust plate to reduce wear and enhance engine life. With a practical RPM range of 4,000 to 42,000, this engine offers smooth and linear power delivery for superior performance in off-road racing environments.
Features:
- Redesigned cylinder and liner with three ports for improved torque
- Black and silver anodized cooling head for efficient heat dissipation
- DLC-coated crankshaft with revised internal shape for better power delivery
- Double-seal front bearing for increased durability and idle stability
- Ceramic bearing in the crankcase for reliable performance
- Specially treated thrust plate reduces friction wear for longer engine life
Specifications:
- Displacement: 3.49 cc / 0.213 cu.in.
- Bore: 0.641 in. (16.27mm)
- Stroke: 0.661in. (16.80mm)
- Output Power: 2.68 ps / 2.64 hp / 34,000 r.p.m.
- Practical RPM Range: 4,000-42,000 r.p.m.
- Engine Weight: 12.28 oz. (348g)
- Recommended Application: 1/8 Buggy Off-Road
Includes:
- (1) B2105 Competition .21 Nitro Engine w/Pipe Combo
CA Residents Prop 65 Warning
WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...Reviews5.0 · 1 review
Hoping I broke it in correctly considering there are many break-in procedure methods out there. My engine is a beast. I have about 2 gallons through it by now and it fires ups every time and idles perfectly. It also throttles up smooth!! The engine is very easy to tune with .5MM idle gap. I have yet to touch the mid needle. The only needles I adjust from a rich setting are the low and top end needles. I’m glad the folks at Amain recommended the engine.