Yamaha XJ 650 Seca (1981) vs Yamaha RD 350LC / RZ 350LC YPVS (1983) vs Yamaha FJR 1300AE (2007)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha |
| Model: | XJ 650 Seca | RD 350LC / RZ 350LC YPVS | FJR 1300AE |
| Years: | 1981 | 1983 | 2007 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder, | Two stroke, parallel twin cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 653 cc / 39.8 cu-in | 347 cc / 21.1 cu-in | 1298 cc / 79.2 cu-in |
| Bore x Stroke: | 63 х 52.4 mm | 64 х 54 mm | 79 x 66.2 mm |
| Cooling System: | Air-cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 9.2:1 | 6.2 :1 | 10.8:1 |
| Induction: | 4x 32mm Hitachi carburetors | 2x 26mm Mikuni slide-needle carburetor | Electronic Fuel Injection |
| Ignition: | Transistorized | Flywheel magneto CDI | TCI (Transistor Controlled Ignition) |
| Starting: | Electric | Kick | Electric |
| Max Power: | 71 hp / 51.8 kW @ 9400 rpm | 59 hp / 43.9 kW @ 9000 rpm | 145 hp / 105.7 kW @ 8500 rpm |
| Max Torque: | 57 Nm / 42 lb-ft @ 7500 rpm | 40.2 Nm / 4.1 kgf-m / @ 8000 rpm | 125 Nm / 13.7kgf-m @ 6000 rpm |
| Clutch: | Wet Multiplate; 7 Steel 8 Friction | Wet multiplate | Wet, multiple discs, cable operated |
| Transmission: | 5 Speed | 6 Speed | 5 Speed Yamaha Chip-Controlled Shift (YCC-S) |
| Final Drive: | Shaft | Chain | Shaft |
| Frame: | Tubular steel dual cradle frame | Tubular mild steel, double front downtubes | Aluminium, twin spar |
| Front Suspension: | 36mm Kayaba forks | 32mm stanchion tube forks | 48mm upside-down telescopic fork w/adjustable preload, compression and rebound damping; |
| Rear Suspension: | Duel Kayaba shocks | Single shock cantilever 5-way adjustable spring preload | Single shock, link-type, w/adjustable preload and rebound damping; |
| Front Brakes: | 2x 268mm disc 1 piston calipers | 2x 267mm disc 1 piston caliper | 2x 320mm discs 4 piston calipers |
| Rear Brakes: | Drum | Drum | Single 283mm disc 2 piston caliper |
| Front Tyre: | 3.25-19 | 3.00-18 | 120/70 ZR17 |
| Rear Tyre: | 120/90-18 | 3.50-18 | 180/55 ZR17 |
| Wheelbase: | 1445 mm / 56.8 in | 1365 mm / 53.7 in | 1544.3 mm / 60.8 in |
| Seat Height: | 780 mm / 30.7 in | 785 mm / 30.9 in | 805 mm - 825.5 mm / 31.7 in - 32.5 in. |
| Ground Clearance: | 145 mm / 5.7 in | 165 mm / 6.4 in | 130 mm / 5.1 in. |
| Dry Weight: | 206 kg / 465 lbs | 143 kg / 315.2 lbs | 264 kg / 582 lbs |
| Fuel Capacity: | 19.5 Litres / 5.1 US gal | 16.5 Liters / 4.3 US gal | 25 Liters / 6.6 gal |
| Standing ¼ Mile: | 12.6 sec. / 171 km/h | 13.5 sec / 99.4 mph | 11.4 sec |