| YAMAHA YZ125 | 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 | |
| 124 cm3 | 1170 cm3 |
| Bore X Stroke | |
| 2.1x2.1 in OR 53 mm | 4.0x2.9 in OR 102 mm |
| Compression Ratio | |
| 8.6 – 10.7:1 | - |
| Horsepower | |
| - | 95/6500 KW(hp)/RPM |
| Torque | |
| - | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
| Fuel System | |
| 38mm Mikuni TMX carburetor | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 6-speed, manual | 6-speed |
| Clutch | |
| Wet multi-disc, manual | - |
| Final Drive | |
| O-ring chain | Shaft |
| chassis specs | |
| Frame | |
|---|---|
| Aluminium | Tubular space frame in steel, engine self-supporting |
| Front Suspension | |
| Adjustable 48mm speed-sensitive system Kayaba inverted fork 11.8-in travel | USD telescopic forks, 45 mm |
| Rear Suspension | |
| Fully adjustable single shock 12.4-in travel | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
| Front Brake | |
| Hydraulic single disc brake, 250mm | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
| Rear Brake | |
| Hydraulic single disc brake, 245mm | Single disc brake, 265 mm, 2-piston floating caliper |
| dimension specs | |
| Overall Length | |
|---|---|
| 84.1 in OR 2136 mm | 86.6 in OR 2200 mm |
| Overall Width | |
| 32.6 in OR 828 mm | 32.7 in OR 831 mm |
| Seat Height | |
| 39.3 in OR 998 mm | 29.7 in OR 754 mm |
| Ground Clearance | |
| 15.2 in OR 386 mm | - |
| Weight | |
| 208 lbs OR 94 kg | 500 lbs OR 227 kg |
| Fuel Capacity | |
| 2.1 gallons OR 7.9 L | 3.7 gallons OR 14.0 L |
| Wheelbase | |
| 56.8 in OR 1443 mm | 59.8 in OR 1519 mm |
| tyres specs | |
| Front | |
|---|---|
| 80/100-21-51M | 100/90-19 |
| Rear | |
| 100/90-19-57M | 150/80-16 |
