KTM 640 LC4 Supercomp (1999) vs Yamaha WR 250F (2022)
Comparison technical specifications
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| Make: | KTM | Yamaha |
| Model: | 640 LC4 Supercomp | WR 250F |
| Years: | 1999 | 2022 |
| Engine: | Four stroke, single Cylinder. SOHC, 4 valves, engine balancer | Four stroke, single cylinder, DOHC, 4 valve Titanium |
| Capacity: | 624.6 cc / 38.1 cu in | 249 cc / 15.2 cu-in |
| Bore x Stroke: | 101 x 78 mm | 77 x 53.6 mm |
| Compression Ratio: | 11.5:1 | 13.8:1 |
| Cooling System: | Liquid cooled | Liquid cooled |
| Lubrication: | 2 x Eaten oil pumps | Wet sump |
| Induction: | Mikuni BST 40 carburetor | Fuel Injection |
| Ignition: | Kokusan contactless DC-CDI ignition with advanced system | TCI: Transistor Controlled Ignition |
| Starting: | Electric & kick | Electric / Kick |
| Clutch: | Multi-disc in oil bath | Wet, multiple disc |
| Transmission: | 5 Speed | Synchronized, 6 speed |
| Final Drive: | Chain, O-ring 5/8 x 1/4" | Chain |
| Frame: | Central chrome-moly steel frame | Semi-double cradle |
| Front Suspension: | White Power – Up Side Down 4357 MXMA fork | Inverted fork, adjustable |
| Front Wheel Travel: | 275 mm / 10.8 in | 310 mm / 12.2 in |
| Rear Suspension: | Central shock absorber (WP BAVP3612) with PRO-LEVER linkage to rear- swing-arm with needle bearing | Swing Arm, Arm Link Suspension |
| Rear Wheel Travel: | 300 mm / 11.8 in | 317 mm / 12.4 in |
| Front Brakes: | Single 300 mm disc, 4 piston caliper | Single 270mm floating wave disc 2 piston caliper |
| Rear Brakes: | Single 220 mm disc, 1 piston caliper | Single 245mm disc 1 piston caliper |
| Front Tyre: | 90/90 - 21 | 90/90-21 54M |
| Rear Tyre: | 130/80 - 18 | 130/90-18 69M |
| Wheelbase: | 1510 mm / 59.4 in | 1480 mm / 58.2 in |
| Ground Clearance: | 310mm / 12.2 in | 320 mm / 12.5 in |
| Seat Height: | 925 mm / 36.4 in | 955 mm / 37.5 in |
| Fuel Capacity: | 11 L / 2.9 US gal / 2.3 Imp gal | 7.9 Litres / 2.1 gal |