YZ100G
| Year | 1980 |
| Engine Class | 80 |
| VIN Prefix | 3R1 |
| Known VIN Range (Vehicle ID Numbers) | 000101 - |
| Tank Color(s) | Competition Yellow |
| Country of Sale | USA |
| Bore (MM) | 49 |
| Stroke (MM) | 42 |
| Displacement (CC) | 79 |
| Compression Ratio (to 1) | 7.6 |
| Torque (kgm) @ RPM | 1.05 |
| Autolube Injection? | No |
| Engine Cooling | Air |
| Carburetor Model | Mikuni VM26SS |
| Ignition Type | CDI (Electronic) |
| Front Tire (stock) | 2.75 x 17 |
| Rear Tire (stock) | 3.60 x 14 |
| Front Brake Type | Drum |
| Rear Brake Type | Drum |
| Rear Suspension | Mono Shock |
| Overall Width (mm) | 785 mm |
| Ground Clearance (mm) | 225 |
| Wheelbase (mm) | 1,185 |
| Dry Weight (kg) | 62 |
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