| YAMAHA XJ 750 Seca | BMW R 12 |
|---|
| engine specs | |
| Type | |
|---|---|
| Yamaha lunched in 1981 one of the most technically advanced motorcycles of its time. Yamaha built the big XJ 750 Seca around a sweetheart of an engine, an enlarged version of 1980’s cruiser surprise, the 650 Maxim. The 750 version of the Seca was understr | Water-cooled, 2-cylinder, four-stroke boxer engine with four valves per cylinder operated by cam followers and two overhead camshafts per cylinder |
| Displacement | |
| 749 cm3 | 1170 cm3 |
| Bore X Stroke | |
| 2.5x2.2 in OR 64 mm | 4.0x2.9 in OR 102 mm |
| Compression Ratio | |
| 9.2:1 | - |
| Horsepower | |
| 76/9000 KW(hp)/RPM | 95/6500 KW(hp)/RPM |
| Torque | |
| 49/7500 lb-ft/RPM OR 66/7500 Nm/RPM | 81/6000 lb-ft/RPM OR 110/6000 Nm/RPM |
| Fuel System | |
| 4x34mm Mikuni Carburetors | - |
| transmission specs | |
| Gearbox | |
|---|---|
| 5-Speed | 6-speed |
| Clutch | |
| Wet multi-plate | - |
| Final Drive | |
| Shaft | Shaft |
| chassis specs | |
| Frame | |
|---|---|
| Double cradle | Tubular space frame in steel, engine self-supporting |
| Front Suspension | |
| Telescopic Forks | USD telescopic forks, 45 mm |
| Rear Suspension | |
| Swing Arm | Aluminium Paralever swinging arm, directly linked WAD spring strut, spring base and rebound damping adjustable |
| Front Brake | |
| Single 269mm Disc | Twin disc brake, floating brake discs, 310 mm, 4-piston monobloc fixed calipers |
| Rear Brake | |
| Drum | Single disc brake, 265 mm, 2-piston floating caliper |
| dimension specs | |
| Overall Length | |
|---|---|
| 86.4 in OR 2195 mm | 86.6 in OR 2200 mm |
| Overall Width | |
| - | 32.7 in OR 831 mm |
| Seat Height | |
| - | 29.7 in OR 754 mm |
| Weelbase | |
| 56.9 in OR 1445 mm | - |
| Weight | |
| 531 lbs OR 241 kg | 500 lbs OR 227 kg |
| Fuel Capacity | |
| 5 gallons OR 18.9 L | 3.7 gallons OR 14.0 L |
| Wheelbase | |
| 56.9 in OR 1445 mm | 59.8 in OR 1519 mm |
| tyres specs | |
| Front | |
|---|---|
| 3.25-19 | 100/90-19 |
| Rear | |
| 120/90-18 | 150/80-16 |
