2009 Yamaha YZF-R6

 Engine Configuration Inline Four, 4-Stroke
Engine Displacement 599cc
 Engine Cooling System  Liquid
 Compression Ratio  13.1:1
 Combustion Chamber Design  Pentroof
 Valves Per Cylinder  4
 Intake Valves Per Cylinder
 2 (Titanium)
 Exhaust Valves Per Cylinder
 2 (Titanium)
Bore x Stroke  67 x 42.5 mm
 Connecting Rod Length (center-to-center) 90.5 mm (3.56 Inches)
Connecting Rod Material  Steel
 Measured Peak Horsepower  100.00 bhp @ 13,500 rpm
 Measured Peak Torque  40.77 lbs. - ft. @ 11,000 rpm
 Claimed Engine Redline  16,000 rpm
Valve Angle (Included)  11.5 degrees Intake / 12.25 degrees Exhaust (23.75 degrees)
 Combustion Chamber Volume  12.38 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  27.0 mm
 Exhaust Valve Diameter  23.0 mm
 Intake Valve Stem Diameter  4.5 mm
 Exhaust Valve Stem Diameter  4.5 mm
 Intake Valve Maximum Lift  8.5 mm
 Exhaust Valve Maximum Lift  7.7 mm
 Intake Valve Timing  
 Open BTDC
 39 degrees
 Close ABDC
 65 degrees
 Duration
 284 degrees
 Exhaust Valve Timing  
 Open BBDC
 64 degrees
 Close ATDC
 24 degrees
 Duration
 268 degrees
 Valve Timing Measuring Point  Intake 0.15 mm, Exhaust 0.25 mm (lift)
 Fuel Delivery System  Mikuni Fuel Injection
 Throttle Body Venturi Size  41 mm
 Air Filter Type  Pleated Paper
 Exhaust System Type  4-2-1
 Ignition System  Digital
 Lubrication System  Wet Sump
 Oil Capacity  3.6 quarts
 Fuel Capacity  4.6 gallons
 Transmission Type  6-speed, Constant Mesh
 Clutch Type  Multi-plate, Wet, Back-torque, limiting
  Clutch Actuation System
 Cable
 Clutch Spring Type
 Coil
  Number Of Clutch Springs
 6
 Number of Clutch Plates  17
 Drive Plates
 9
  Driven Plates
 8
 Primary Drive  Gear (Straight-cut)
 Primary Drive Gear Teeth (Ratio)  85/ 41 (2.073:1)
 Final Drive Sprocket Teeth (Ratio)  45/ 16 (2.813:1)
 Transmission Gear Teeth (Ratios)  
 6th
 23/ 20 (1.150:1)
 5th
 27/ 21 (1.286:1)
 4th
 26/ 18 (1.444:1)
 3rd
 30/ 18 (1.667:1)
 2nd
 32/ 16 (2.000:1)
 1st
 31/ 12 (2.583:1)
 Transmission Overall Ratios  
 6th
 6.706:1
 5th
 7.499:1
 4th
 8.420:1
 3rd
 9.721:1
 2nd
 11.663:1
 1st
 15.062:1