| Year | 1983 |
| Bore x Stroke | 64 х 54 mm |
| Capacity | 347 cc / 21.1 cu-in |
| Clutch | Wet multiplate |
| Compression Ratio | 6.0 :1 |
| Consumption Average | 43 mpg |
| Cooling System | Liquid cooled |
| Dimensions | Length 2133.6 mm / 84 in Width 736.6 mm / 29 in |
| Dry Weight | 145 kg / 320 lbs |
| Engine | Two stroke, parallel twin cylinder with electronically actuated exhaust port valve |
| Final Drive | Chain |
| Frame | Welded steel tubular full loop |
| Front Brakes | 2x 267mm disc 1 piston caliper |
| Front Suspension | 32mm Stanchion tube telescopic forks |
| Front Tyre | 90/90-18 |
| Front Wheel Travel | 140mm / 5.5 in |
| Fuel Capacity | 16.6 Litres / 4.4 US gal |
| Ground Clearance | 171.4mm / 6.75 in |
| Ignition | Flywheel magneto CDI |
| Induction | 2x 26mm Mikuni slide-needle carburetor |
| Lubrication | Autolube |
| Max Power | 59 hp / 43.9 kW @ 9000 rpm |
| Max Torque | 47 Nm / 34.7 lb-ft / @ 8000 rpm |
| Model | Yamaha RD 350LC YPVS Kenny Roberts Signature |
| Rear Brakes | Single 267mm disc |
| Rear Suspension | Single shock cantilever 5-way adjustable spring preload |
| Rear Tyre | 110/80-18 |
| Rear Wheel Travel | 95 mm / 3.7 in |
| Road Test | Weekly |
| Seat Height | 800 mm / 31.5 in |
| Standing ¼ Mile | 13.5 sec / 99.4 mph |
| Starting | Kick |
| Top Speed | 188.2 km/h / 117 mph |
| Transmission | 6 Speed |
| Wet Weight | 149 kg / 328 lbs |
| Wheelbase | 1384.3 mm / 54.5 in |
