| YAMAHA XT 660X | BMW R 12 |
|---|
| engine specs | |
| Type | |
|---|---|
| Single cylinder, liquid-cooled, 4-stroke, SOHC, 4-valves | Water-cooled, 2-cylinder, four-stroke boxer engine with four valves per cylinder operated by cam followers and two overhead camshafts per cylinder |
| Displacement | |
| 660 cm3 | 1170 cm3 |
| Bore X Stroke | |
| 3.9x3.3 in OR 99 mm | 4.0x2.9 in OR 102 mm |
| Compression Ratio | |
| 10.0:1 | - |
| Horsepower | |
| 48/6000 KW(hp)/RPM | 95/6500 KW(hp)/RPM |
| Torque | |
| 44/5250 lb-ft/RPM OR 60/5250 Nm/RPM | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
| Fuel System | |
| Electronic Injection | - |
| transmission specs | |
| Gearbox | |
|---|---|
| Constant Mesh, 5-speed | 6-speed |
| Clutch | |
| Wet multi-disc, manual | - |
| Final Drive | |
| Chain | Shaft |
| chassis specs | |
| Frame | |
|---|---|
| Steel tube diamond shaped | Tubular space frame in steel, engine self-supporting |
| Front Suspension | |
| Telescopic forks | USD telescopic forks, 45 mm |
| Rear Suspension | |
| Linked monoshock with spring preload adjustment | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
| Front Brake | |
| Hydraulic single disc, 320 mm | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
| Rear Brake | |
| Hydraulic single disc, 245 mm | Single disc brake, 265 mm, 2-piston floating caliper |
| dimension specs | |
| Overall Length | |
|---|---|
| 85.6 in OR 2174 mm | 86.6 in OR 2200 mm |
| Overall Width | |
| 33.9 in OR 861 mm | 32.7 in OR 831 mm |
| Seat Height | |
| 34.4 in OR 874 mm | 29.7 in OR 754 mm |
| Ground Clearance | |
| 8.3 in OR 211 mm | - |
| Weight | |
| 410 lbs OR 186 kg | 500 lbs OR 227 kg |
| Fuel Capacity | |
| 4 gallons OR 15.1 L | 3.7 gallons OR 14.0 L |
| Wheelbase | |
| 59.3 in OR 1506 mm | 59.8 in OR 1519 mm |
| tyres specs | |
| Front | |
|---|---|
| 120/70R 17M/C | 100/90-19 |
| Rear | |
| 160/60R 17M/C | 150/80-16 |
