1983 Yamaha YZ80 Specifications and Specs
Specifications and workshop reference information for the 1983 Yamaha YZ80, including engine, chassis, service data and setup details.
Note: Specs are compiled from factory data, manuals and owner feedback. Bikes vary — if yours is different, jump into the forum and share it.
General Specifications
| Engine Type | Air-cooled, single-cylinder, 2-stroke, reed valve |
| Displacement | 79 cc |
| Bore × Stroke | 47.0 × 45.6 mm |
| Compression Ratio | Approx. 7.2:1 |
| Maximum Power | Approx. 14–16 hp |
| Maximum Torque | N/A |
| Carburetor | Mikuni VM26SS | Replacement Options |
| Lubrication | Premix |
| Fuel Mix Ratio | 20:1 – 32:1 | Premix Calculator |
| Ignition | CDI |
| Spark Plug | NGK B8ES |
| Spark Plug Gap | 0.6 – 0.7 mm |
Transmission
| Transmission Type | 6-speed manual |
| Clutch | Wet multi-plate |
| Primary Reduction | 3.042 |
| Final Reduction | 3.615 |
| Overall Reduction | N/A |
Dimensions
| Overall Length | Approx. 1,750 mm |
| Overall Width | Approx. 730 mm |
| Overall Height | Approx. 1,060 mm |
| Wheelbase | Approx. 1,170 mm |
| Ground Clearance | Approx. 300 mm |
| Fuel Tank Capacity | Approx. 5.5 L |
| Bearing Sizes |
Bearing Finder |
Chassis
| Frame Type | Steel single cradle |
| Caster Angle | Approx. 27° |
| Trail | N/A |
| Front Suspension | Telescopic forks | Fork Oil Levels |
| Rear Suspension | Monocross monoshock |
| Front Suspension Travel | Approx. 230 mm |
| Rear Suspension Travel | Approx. 260 mm |
Brakes & Wheels
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