Introduction

Designed to achieve the easiest operation and max performance over & over, the new PRO-28BX-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 28 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-28BX-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-28BX-R engine x 1 EA

2. Carburetor Assembly x 1 EA

3. Instructional manual x 1 EA

4. TT logo stickerx x 1 EA

Specification

Displacement(c.c. / cu.in.)     4.63 c.c. / .282 cu.in.

Bore(mm / in.)     18.30 mm / 0.720 in.

Stroke(mm / in.)     17.6 mm / 0.693 in.

Practical R.P.M.(R.P.M.)     3,000 ~ 35,000 rpm

Output(BHP/RPM)     2.40 BHP / 30,000 RPM

Weight(g/oz)     460 g / 16.23 oz