Specifications: 2005 Yamaha YZF-R6

Engine Configuration Inline Four, 4-Stroke
Engine Displacement 599 cc
Engine Cooling System Liquid
Compression Ratio 12.4:1
Combustion Chamber Design Pentroof
Valves Per Cylinder 4
Intake Valves Per Cylinder
2
Exhaust Valves Per Cylinder
2
Bore x Stroke 65.5 x 44.5 mm
Measured Peak Horsepower 105.3 bhp @ 13,000 rpm
Measured Peak Torque 43.6 lbs.-ft. @ 10,150 rpm
Measured Horsepower-to-weight Ratio  4.00 lbs. per horsepower
Engine Redline 15,500 rpm
Valve Angle (Included) 14.0 degrees intake/ 14.0 degrees exhaust (28.0 degrees)
Combustion Chamber Volume 10.6 cc
Valve Train Type DOHC, Link Plate Chain Drive, Bucket Followers, Shim-under-bucket
Lash Adjustment
Valve Adjustment Interval 26,600 miles
Intake Valve Diameter 25.0 mm
Exhaust Valve Diameter 22.0 mm
Intake Valve Stem Diameter 4.0 mm
Exhaust Valve Stem Diameter 4.0 mm
Intake Valve Maximum Lift 8.5 mm
Exhaust Valve Maximum Lift 7.6 mm
Intake Valve Timing  
Open BTDC
39 degrees
Close ABDC
69 degrees
  Duration
288 degrees
Exhaust Valve Timing  
  Open BBDC
66 degrees
  Close ATDC
34 degrees
  Duration
280 degrees
Valve Timing Measuring Point Intake, 0.15 mm; Exhaust, 0.25mm
Fuel Delivery System Mikuni Fuel Injection
Throttle Body Venturi Size 40 mm
Air Filter Type Wet Elements
Exhaust System Type 4-2-1
Ignition System Digital Electric
Lubrication System Wet Sump
Oil Capacity 3.6 quarts (3.4 liters)
Fuel Capacity 4.5 gallons (17.0 liters)
Transmission Type 6-speed, Constant Mesh
Clutch Type Multi-plate, Wet
Clutch Actuation System
Cable
Clutch Spring Type
Coil
Number Of Clutch Springs
6
 Number of Clutch Plates
15
Drive Plates
8
Driven Plates
7
Primary Drive Gear
Primary Drive Gear Teeth (Ratio) 86/44 (1.955:1)
Final Drive Sprocket Teeth (Ratio) 48/16 (3.000:1)
Transmission Gear Teeth (Ratios)  

6th
26/24 (1.083:1)

5th
25.21 (1.190:1)

4th
32/24 (1.333:1)

3rd
28/18 (1.556:1)

2nd
37/19 (1.947:1)

1st
37/13 (2.846:1)
Transmission Overall Ratios

  6th
6.352:1

  5th
6.979:1

  4th
7.818:1

  3rd
9.126:1

  2nd
11.419:1

  1st
16.692:1