1978-1982 Model Honda BIALS TL50
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| Honda BIALS TL50 photo. Model year: 1978. Color: white with red-black strip. |
Equipped with a CB50 series 4-stroke 50cc engine with a maximum output of 4.2ps. This engine was used until the later Ape (2001). As a 50cc trial model, the TLM50 appeared at the end of 1983, but the TLM50 was equipped with a two-stroke engine.
It gained popularity as a full-size 50 that can be enjoyed all-round rather than an introductory trial model. The 78 model changed the coloring.
● Air-cooled 4-stroke OHC 2-valve single cylinder ● 49cc ● 4.2PS/9500rpm ● 0.36kg-m/7500rpm ● 77kg ● 2.50-18・2.75-17 ● 125,000 yen
It has 18- and 17-inch tires, so it’s not for competition, but its lightweight body in its class was evaluated as an entry-level model, along with the TY50.
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| Picture of Honda BIALS TL50 1978. Body Colour: White with green-black sticker. |
1978 Honda BIALS TL50 Basic Specs
| Type grade name | BIALS TL50 |
|---|---|
| Model change category | Minor change |
| Model | TL50 |
| Release year | 1978 |
| Release month | 2 |
| Destination/specifications | Domestic model |
| Total Length (mm) | 1825 |
| Width (mm) | 735 |
| Total height (mm) | 985 |
| Wheelbase (mm) | 1185 |
| Minimum ground clearance (mm) | 215 |
| Vehicle weight (kg) | 80 |
| Minimum turning radius (m) | 1.7 |
| Ride capacity (persons) | 1 |
| Fuel consumption rate (1) (km/L) | 85.0 |
| Metric (1) | At 30km/h |
| Motor type | TL50E |
| Motor type | 4-stroke |
| Number of cylinders | 1 |
| Cylinder arrangement | Single cylinder |
| Cooling method | Air cooling |
| Displacement (cc) | 49 |
| Cam valve drive system | OHC (SOHC) |
| Inner diameter (cylinder bore) (mm) | 42 |
| Piston stroke (mm) | 35.6 |
| Compression ratio (:1) | 9.5 |
| Max Power (PS) | 4.2 |
| Max output speed (rpm) | 9500 |
| Maximum torque (kgf･m) | 0.36 |
| Max Torque Speed (rpm) | 7500 |
| Fuel supply system | Carburetor |
| Fuel tank capacity (L) | 4 |
| Cruising range with full tank (approximate/reference value) | 340.0 |
| Engine starting method | Kickstarter |
| Ignition | Magnetic |
| Equipped with spark plugs as standard / model | C6HSA |
| Required number of spark plugs/total | 1 |
| Equipped battery type | 6N2 |
| Battery Capacity | 6V-2Ah |
| Engine lubrication method | Wet sump method |
| Engine oil capacity*Total capacity (L) | 0.9 |
| Clutch type | Wet, multi-plate |
| Transmission type | Return type, 5 speeds |
| Transmission and operation method | Foot shift |
| Primary reduction ratio | 4.437 |
| Secondary reduction ratio | 3.916 |
| Transmission ratio | 1st gear 3.082/2nd gear 1.881/3rd gear 1.399/4th gear 1.129/5th gear 0.959 |
| Power Transmission System | Chain |
| Frame type | Diamond |
| Caster angle | 62°00′ |
| Trail amount (mm) | 97 |
| Brake type (front) | Mechanical leading trailing |
| Brake type (rear) | Mechanical leading trailing |
| Suspension system (front) | Telescopic fork |
| Suspension system (rear) | Swing arm type |
| Rear suspension stroke (mm) | 2 |
| Tire (front) | 2.50-18 |
| Tire (front) structure name | Bias |
| Tire (front) ply rating | 4PR |
| Tire (front) type | Tube tire |
| Tire (rear) | 2.75-17 |
| Tire (rear) structure name | Bias |
| Tire (rear) ply rating | 4PR |
| Tire (rear) type | Tube tire |
| Wheel rim width (front) | 1.4 |
| Wheel Rim Width (Rear) | 1.4 |
| Standard designated tire pressure (at passenger capacity/front) | 1.50 |
| Standard specified tire pressure (at passenger capacity/after) | 1.75 |
| Headlight Rating (Hi) | 15W/15W |
| Tail light rating (braking/tail light) | 10W/3W |
| Speedometer display format | Analog |
Motorcycle Profile
In February 1976, along with the CB50JX-1 and XE50, the first model Honda Bials TL50 was released as a corner of a serious 50cc motorcycle trio. As you can see from the model name “Bialus”, which was a coined word that was a combination of motorcycle and trials, and its appearance, the TL50 is positioned as a full-fledged trials bike even though it is a 50cc. The vertical 49cc air-cooled 4-stroke single-cylinder engine of the CB50 series is common to the trio announced at the same time, but it is set according to each character, and the Bials TL50 adjusts the valve timing for trial driving that emphasizes low speed. Then, 4.2ps was generated at 9,500 rpm. The mission was a 5-step return type, and the rear shock was adjustable in 5 steps. However, even though it is “authentic”, the wheel size is slightly smaller at 18 inches in the front and 17 inches in the rear. The true value of the Vialus TL50 was that it was not only used for competitions, but also for casual enjoyment of trials.