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.

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