KTM RC 125 (2018-19) vs Yamaha XJ 650 Turbo (1982-84)
Comparison technical specifications
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| Make: | KTM | Yamaha |
| Model: | RC 125 | XJ 650 Turbo |
| Years: | 2018-19 | 1982-84 |
| Engine: | Four stroke, single cylinder. DOHC with finger followers, 4 Valve | Four stroke transverse four cylinder. turbocharged. DOHC, 2 valves per cylinder, |
| Capacity: | 124.7 cc / 7.6 cu-in | 653 cc / 39.8 cu-in |
| Bore x Stroke: | 58 x 47.2 mm | 63 х 52.4 mm |
| Cooling System: | Liquid Cooled | Air-cooled |
| Compression Ratio: | 14.5:1 | 8.2:1 |
| Induction: | Bosch Injection | 4x 30mm pressurized Mikuni CVs carburetors |
| Ignition: | Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment | CDI |
| Starting: | Electric | Electric |
| Max Power: | 15.hp / 10.9 kW @ 9500 rpm | 90 hp / 67.1 kW @ 9000 rpm　 |
| Max Torque: | 11.8 Nm / 8 lb•ft @ 8000 rpm | 8.33 kgf-m @ 7000 rpm |
| Clutch: | Wet multi-disc clutch / mechanically operated | Wet, multi-plate |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Chain 5/8 x 1/4” X‑Ring | Shaft |
| Front Suspension: | WP Suspension Up Side Down | 36mm Showa 140mm wheel travel, adjustments for air pressure |
| Rear Suspension: | WP Monoshock | Dual Showa dampers, 79mm wheel travel, adjustments for air pressure, rebound damping |
| Front Brakes: | Single 300mm disc | 2x 266mm discs |
| Rear Brakes: | Single 230mm disc | Single 200mm drum |
| Front Tyre: | 110/70 -17 | 3.25-19 |
| Rear Tyre: | 150/60 –17 | 120/90 V18 |
| Dry Weight: | 135 kg / 297.6 lbs | 235 kg / 518 lbs |
| Fuel Capacity: | 10 Liters / 2.6 US gal | 19.5 Litres / 5.0 US gal |