1973 Yamaha RT3-360
Specifications and workshop reference information for the 1973 Yamaha RT3-360, 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 |
| Displacement | 351cc |
| Bore × Stroke | 80.0 × 70.0 mm |
| Compression Ratio | 6.9:1 |
| Maximum Power | ~30 hp |
| Maximum Torque | ~38 Nm |
| Carburetor | Mikuni VM30 |
| Lubrication | Autolube oil injection |
| Fuel Mix Ratio | Oil injection (premix optional) |
| Ignition | Breaker points |
| Spark Plug | NGK B8ES |
| Spark Plug Gap | 0.6–0.7 mm |
Transmission
| Transmission Type | 6-speed manual |
| Clutch | Wet multi-plate |
| Primary Reduction | 2.952 |
| Final Reduction | 3.071 |
| Overall Reduction | ~9.07 (top gear) |
Dimensions
| Overall Length | ~2,150 mm |
| Overall Width | ~870 mm |
| Overall Height | ~1,160 mm |
| Wheelbase | 1,400 mm |
| Ground Clearance | ~230 mm |
| Fuel Tank Capacity | ~9.5 L |
Chassis
| Frame Type | Steel double cradle |
| Caster Angle | ~28° |
| Trail | ~115 mm |
| Front Suspension | Telescopic forks |
| Rear Suspension | Twin shock swingarm |
| Front Suspension Travel | ~180 mm |
| Rear Suspension Travel | ~120 mm |
Brakes & Wheels
| Front Tire | 3.00-21 |
| Rear Tire | 4.00-18 |
| Front Brake | Drum |
| Rear Brake | Drum |
360cc Other Specs
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