PRO-21BX-R  | Specification:
- Displacement(c.c. / cu.in.): 3.49 c.c. / .213 cu.in.
- Bore(mm / in.): 16.26 mm / 0.640 in.
- Stroke(mm / in.): 16.8 mm / 0.661 in.
- Practical R.P.M.(R.P.M.): 3,000 ~ 36,000 rpm
- Output(BHP/RPM): 2.15 BHP / 30,000 RPM
- Weight(g/oz): 460 g / 16.23 oz | Introduction: Designed to achieve the easiest operation and max performance over & over, the new PRO-21BX-R delivers an awesome raw power & durability !
The new webbed reinforced compact crankcase is made for added wearing resistance and provides effective heat dispersion for longer runs.
All PRO series engines are manufactured by automated computer-controlled machinery, using the highest quality materials and state-of-the-art CNC manufacturing techniques to deliver a powerplant that looks and performs better. Precision mixture control carburetor makes adjustments simple, the crankshaft is lightened, and balanced to achieve a smoother and more efficient fuel mixture.
The new 21 engine fits in the same mounting as the original .21/.28 engines, with no additional weight - but delivers greater output and higher practical rpm.
The Pro-21BX-R is equipped with a built-in recoil starters ("X" type) for easy and quick start. | Features: Rear exhaust
ABC construction: Aluminum piston with Cr-plated brass cylinder liner
Hypereutectic machined Al-Si ringed piston
High-strength connecting rod with bushings pre-installed
SG crankshaft
One-piece crankcase with squared-off cooling fins
Dual ball bearing-supported crankshaft
Machined over-sized heat sink head
Built-in pull starting backplate
Three-needle valves slide valve carburetor
State-of-the-art CNC machined components | Content: 1. PRO-21BX-R engine x 1 EA
2. Carburetor Assembly x 1 EA
3. Instructional manual x 1 EA
4. TT logo stickerx x 1 EA |
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Engines 
