GT1
Category: Minis
Manufacturer: Yamaha
Hits: 1346
| Year | 1973 |
| Engine Class | 80 |
| VIN Prefix | 393 |
| Known VIN Range (Vehicle ID Numbers) | 000101 to 025690 |
| Tank Color(s) | Competition Yellow |
| Country of Sale | USA |
| Bore (MM) | 47 |
| Stroke (MM) | 42 |
| Displacement (CC) | 72 |
| Compression Ratio (to 1) | 6.0 |
| BHP @ RPM | 4.9 |
| Torque (kgm) @ RPM | 0.6 @ 7,200 |
| Autolube Injection? | Yes |
| Engine Cooling | Air |
| Carburetor Model | Teikei Y16P-3 |
| Ignition Type | Magneto |
| Ignition Timing MM (BTDC) | 1.8 |
| Primary Drive Gearing | 68/19 (3.578) |
| Final Drive Gearing (Sprockets) | 41/14 (2.928) |
| Box Gearing First | 30.064 |
| Box Gearing Second | 20.962 |
| Box Gearing Third | 14.973 |
| Box Gearing Fourth | 11.791 |
| Fuel Capacity (L) | 3.89 |
| 2 Stroke Oil Tank Capacity (L) | .66 |
| Front Tire (stock) | 2.50 x 15 |
| Rear Tire (stock) | 2.50 x 15 |
| Front Brake Type | Drum |
| Rear Brake Type | Drum |
| Rear Suspension | Twin Shock |
| Front Suspension Travel (mm) | 102 |
| Rear Suspension Travel (mm) | 76 |
| Rake (degrees) | 32 |
| Trail (mm) | 68.58 mm |
| Overall Width (mm) | 690.88 mm |
| Ground Clearance (mm) | 195.58 |
| Wheelbase (mm) | 1043.94 |
| Dry Weight (kg) | 58.97 |
| Carburetor Type | Teikei Y16P-3 |
| Main Jet | 94 |
| Needle Jet | 2.085 |
| Jet Needle | 029-1 |
| Slide Cutaway | 1.0 |
| Pilot Jet | 40 |
| Air Screw (turns out) | 1.5 |
| Starter Jet | 90 |
| Float Level (mm) | Not Adjustable |