There were little changes in the 2004 model year. Minor updates such as an upgraded muffler with larger internal piping and changes to the fuel mapping and ignition curves. It also uses newer versions of the Dunlop tires.
| SPECIFICATIONS | |
| Model Information | YZF-R6S (USA) |
| YZF-R6SC (California) | |
| Weight | 357 lbs (dry) |
| 401 lbs (wet) | |
| Engine Type | Liquid-cooled, 4 stroke, DOHC |
| Piston Arrangement | In-line 4 |
| Displacement | 600cc |
| Horsepower | . |
| Torque | . |
| Power to Weight Ratio | . |
| . | |
| Bore and Stroke | 65.5 x 44.5 mm |
| Redline | 15,500 rpm |
| Carburation | 38mm flatside FI throttle bodies |
| Compression Ratio | 12.4:1 |
| Oil Capacity | 2.85 qts |
| Fuel Capacity | 4.5 gal |
| 0.92 gal reserve | |
| Radiator Capacity | 2.27 qts |
| Primary Gears | 86/44 (1.955) |
| Secondary Gears | 48/16 (3.00) |
| Chain Size | . |
| Clutch Friction Plates | 8 |
| Clutch Steel Plates | 7 |
| Clutch Springs | 6 |
| Wheel Base | 54.3" |
| Overall Length | 79.7" |
| Overall Width | 27.2" |
| Overall Height | 42.9" |
| Seat Height | 32.3" |
| Lean Angle | . |
| Ground Clearance | . |
| Rake | 24 degrees |
| Trail | 86 mm (3.4") |
| Swingarm Length | . |
| Front Fork | 43 mm Diameter |
| Front Spring Rate | . |
| Rear Spring Rate | . |
| Front Wheel Travel | 4.7" |
| Rear Wheel Travel | 4.7" |
| Front Wheel | 17x3.50 Aluminium 5-spoke |
| Front Tire | 120/60ZR-17 |
| Rear Wheel | 17X5.50 Aluminium 5-spoke |
| Rear Tire | 180/55ZR-17 |
| Front Caliper | 2-pot per side |
| Front Disc | 298x5 mm per side |
| Rear Caliper | 1-pot |
| Rear Disc | 220x5 mm |
