Yamaha GT80 B 1975 - Specifications & Review
Article Complete Info
| Articleid | 535756 |
|---|---|
| Category | Enduro-offroad |
| Make | Yamaha |
| Model | GT80 B |
| Year | 1975 |
Chassis, Suspension, Brakes & Wheels
| Frametype | Steel |
|---|---|
| Frontbrakes | Expanding brake (drum brake) |
| Frontbrakesdiameter | 127 mm (5.0 inches) |
| Frontsuspension | inverted forks |
| Fronttyre | 2.50-15 |
| Frontwheeltravel | 102 mm (4.0 inches) |
| Rake | 32.0° |
| Rearbrakes | Expanding brake (drum brake) |
| Rearbrakesdiameter | 127 mm (5.0 inches) |
| Rearsuspension | non-adjustable dual shock |
| Reartyre | 2.75-14 |
| Rearwheeltravel | 76 mm (3.0 inches) |
Engine & Transmission
| Borexstroke | 47.0 x 42.0 mm (1.9 x 1.7 inches) |
|---|---|
| Clutch | Wet plate |
| Compression | 6.0:1 |
| Coolingsystem | Air |
| Displacement | 72.00 ccm (4.39 cubic inches) |
| Enginedetails | Single cylinder, two-stroke |
| Exhaustsystem | Single tuned pipe |
| Fuelsystem | Carburettor. TEIKEI |
| Gearbox | 4-speed |
| Ignition | Points type Ignition |
| Lubricationsystem | Auto lube |
| Maxrpm | 8000 |
| Power | 4.90 HP (3.6 kW)) |
| Topspeed | 91.0 km/h (56.5 mph) |
| Torque | 6.10 Nm (0.6 kgf-m or 4.5 ft.lbs) @ 7200 RPM |
| Transmissiontypefinaldrive | Chain |
Other Specifications
| Coloroptions | White/Competition Yellow |
|---|---|
| Starter | Kick |
Physical Measures & Capacities
| Dryweight | 59.0 kg (130.0 pounds) |
|---|---|
| Fuelcapacity | 4.92 litres (1.30 gallons) |
| Powerweightratio | 0.0831 HP/kg |
| Weightincloilgasetc | 60.3 kg (133.0 pounds) |
About Yamaha GT80 B 1975
Introducing the 1975 Yamaha GT80 B
The 1975 Yamaha GT80 B is a spirited entry in the enduro-offroad category, designed for enthusiasts looking to conquer both trails and urban environments with style and agility. With its lightweight frame and compact dimensions, this bike appeals particularly to younger riders and those new to the world of off-road motorcycling. Representing a blend of rugged capability and approachable power, the GT80 B is perfectly positioned as an entry-level motorcycle that doesn't skimp on fun or performance.
Engine Performance and Riding Characteristics
At the heart of the GT80 B lies a lively single-cylinder, two-stroke engine with a displacement of 72cc, delivering a respectable 4.9 horsepower. This powerplant is engineered to provide an exhilarating ride, with peak torque of 6.1 Nm available at 7200 RPM. The bike’s lightweight construction (weighing in at just 59 kg) and a top speed of 91 km/h (56.5 mph) offer a thrilling experience, whether you're navigating through rugged trails or zipping around town. The 4-speed gearbox paired with a wet plate clutch ensures smooth transitions, allowing riders to tap into the bike's capabilities effortlessly. The air-cooled design keeps the engine running at optimal temperatures, making it an ideal companion for long rides in varied conditions.
Key Features and Technology
The GT80 B boasts several features that enhance its performance and rider comfort. The steel frame is robust yet lightweight, contributing to the bike's agility on and off the road. Its inverted front forks provide 4 inches of travel, absorbing shocks from uneven terrain, while the non-adjustable dual shock at the rear offers 3 inches of travel for a balanced ride. Stopping power is provided by reliable expanding drum brakes front and rear, ensuring safety on any surface. In terms of aesthetics, the GT80 B comes in a striking white and competition yellow color scheme, embodying the spirit of 1970s motocross. The bike features a kickstarter for reliability, ensuring you can always get back on the road with minimal hassle.
Pros and Cons
Pros:
- Lightweight Design: At just 59 kg, it’s easy to maneuver, making it perfect for novice riders.
- Fun Engine Performance: The 72cc two-stroke engine offers a lively ride and a top speed of 91 km/h, great for both trails and city commutes.
- Classic Style: The combination of vintage aesthetics and vibrant color options gives it a nostalgic appeal that resonates with enthusiasts.
Cons:
- Limited Suspension Adjustability: The non-adjustable rear suspension may not cater to all riders' preferences, especially on more challenging terrains.
- Drum Brakes: While reliable, the drum brakes may not provide the same stopping power or responsiveness as modern disc brakes.
- Kick Start Only: The kickstarter, while nostalgic, can be a drawback for those used to the convenience of electric start systems.
In summary, the 1975 Yamaha GT80 B is a delightful blend of performance, style, and accessibility, making it a standout choice for both emerging riders and collectors looking to relive the golden age of off-road motorcycles. With its engaging ride and classic design, it remains a cherished piece of motorcycling history.