| Specifications - Note: These specs only apply to the '03 VTX 1300S Retro | |||
| General | |||
| Engine | |||
| Cylinder arrangement | 2 cylinders 52° V transverse | ||
| Bore and stroke | 3.52 x 4.11 inches | ||
| Displacement | 80.0 cubic inches (1312 cm) | ||
| Compression ratio | 9.2 : 1 | ||
| Valve train | Silent cam chain driven, Overhead Cam | ||
| Intake valve | Opens | 0° BTDC (at 1 mm lift) | |
| Intake valve | Closes | 50° ABDC (at 1mm lift) | |
| Exhaust valve | FRONT Opens | 46° BBDC (at 1 mm lift) | |
| Exhaust valve | REAR Opens | 54° BBDC (at 1 mm lift) | |
| Exhaust valve | FRONT Closes | 4° ATDC (at 1 mm lift) | |
| Exhaust valve | REAR Closes | -4° ATDC (at 1 mm lift) | |
| Lubrication system | Forced pressure and wet sump | ||
| Oil pump type | Trochoid | ||
| Cooling system | Liquid cooled | ||
| Air filtration | Viscous paper element | ||
| Engine dry weight | 239.8 Lbs | ||
| Firing order | Front - 308° - Rear -412° - Front | ||