1973 Yamaha MX360
Specifications and workshop reference information for the 1973 Yamaha MX360, 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, 2-stroke, single-cylinder, reed valve |
| Displacement | 360 cc |
| Bore × Stroke | 80.0 × 70.0 mm |
| Compression Ratio | Approx. 7.0:1 |
| Maximum Power | Approx. 32 hp |
| Maximum Torque | Approx. 39 Nm |
| Carburetor | Mikuni VM36 |
| Lubrication | Premix |
| Fuel Mix Ratio | 20:1 – 25:1 |
| Ignition | Magneto (points) |
| Spark Plug | NGK B9ES |
| Spark Plug Gap | 0.6 – 0.7 mm |
Transmission
| Transmission Type | 5-speed manual |
| Clutch | Wet multi-plate |
| Primary Reduction | 3.409 |
| Final Reduction | 3.000 |
| Overall Reduction | Varies by gear |
Dimensions
| Overall Length | Approx. 2,150 mm |
| Overall Width | Approx. 870 mm |
| Overall Height | Approx. 1,180 mm |
| Wheelbase | Approx. 1,420 mm |
| Ground Clearance | Approx. 300 mm |
| Fuel Tank Capacity | Approx. 8.5 L |
Chassis
| Frame Type | Steel tubular, double cradle |
| Caster Angle | Approx. 28° |
| Trail | Approx. 115 mm |
| Front Suspension | Telescopic fork |
| Rear Suspension | Twin shock swingarm |
| Front Suspension Travel | Approx. 200 mm |
| Rear Suspension Travel | Approx. 120 mm |
Brakes & Wheels
| Front Tire | 3.00-21 |
| Rear Tire | 4.00-18 |
| Front Brake | Drum |
| Rear Brake | Drum |
360cc Other Specs
Community
VMX Owners Forum
Discuss vintage motocross bikes, restorations, tuning and riding.