| YAMAHA YZ250 | BMW R 12 |
|---|
| engine specs | |
| Type | |
|---|---|
| liquid-cooled 2-stroke reed-valve inducted | Water-cooled, 2-cylinder, four-stroke boxer engine with four valves per cylinder operated by cam followers and two overhead camshafts per cylinder |
| Displacement | |
| 249 cm3 | 1170 cm3 |
| Bore X Stroke | |
| 2.6x2.8 in OR 66 mm | 4.0x2.9 in OR 102 mm |
| Compression Ratio | |
| 9.2 – 10.9:1 | - |
| Horsepower | |
| - | 95/6500 KW(hp)/RPM |
| Torque | |
| 35/7500 lb-ft/RPM OR 47/7500 Nm/RPM | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
| Fuel System | |
| Keihin PWK38S carburetor | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 5 speed, manual | 6-speed |
| Clutch | |
| Multiplate wet clutch | - |
| Final Drive | |
| O-ring chain | Shaft |
| chassis specs | |
| Frame | |
|---|---|
| Aluminium semi-double-cradle | Tubular space frame in steel, engine self-supporting |
| Front Suspension | |
| 48mm Kayaba inverted cartridge fork, 11.8 in. travel, Speed-Sensitive System | USD telescopic forks, 45 mm |
| Rear Suspension | |
| Kayaba fully adjustable link monocross 315 mm (12.4 in.) travel | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
| Front Brake | |
| 250mm floating disc | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
| Rear Brake | |
| 245mm disc | Single disc brake, 265 mm, 2-piston floating caliper |
| dimension specs | |
| Overall Length | |
|---|---|
| 85.7 in OR 2177 mm | 86.6 in OR 2200 mm |
| Overall Width | |
| 32.6 in OR 828 mm | 32.7 in OR 831 mm |
| Seat Height | |
| 39.1 in OR 993 mm | 29.7 in OR 754 mm |
| Ground Clearance | |
| 15 in OR 381 mm | - |
| Weight | |
| 229 lbs OR 104 kg | 500 lbs OR 227 kg |
| Fuel Capacity | |
| 2.1 gallons OR 7.9 L | 3.7 gallons OR 14.0 L |
| Wheelbase | |
| 58.3 in OR 1481 mm | 59.8 in OR 1519 mm |
| tyres specs | |
| Front | |
|---|---|
| 80/100-21 51M | 100/90-19 |
| Rear | |
| 110/90-19 62M | 150/80-16 |
