2007 Yamaha YZF-R1

http://www.yamahazone.biz/

 Engine Configuration Inline Four, 4-stroke
Engine Displacement 998 cc
 Engine Cooling System  Liquid
 Compression Ratio  12.7:1
 Combustion Chamber Design Pentroof
 Valves Per Cylinder  4
 Intake Valves Per Cylinder
 2 (Titanium)
 Exhaust Valves Per Cylinder
 2 (Steel)
Bore x Stroke  77 mm x 53.6 mm
Claimed Peak Horsepower 178 bhp @ 12,500 rpm
Claimed Peak Torque 82 lbs. - ft. @ 10,000
 Measured Peak Horsepower  158.90 bhp @ 12,050 rpm
 Measured Peak Torque  76.45 lbs. - ft. @ 9,550 rpm
 Measured Horsepower-to-weight Ratio  2.89 pounds per horsepower
 Engine Redline  13,750 rpm
Valve Angle (Included)  11.5 degrees intake, 12.5 degrees exhaust (24 degrees)
 Combustion Chamber Volume  22.6 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  31 mm
 Exhaust Valve Diameter  25 mm
 Intake Valve Stem Diameter  5 mm
 Exhaust Valve Stem Diameter  4.5 mm
 Intake Valve Maximum Lift  9.2 mm
 Exhaust Valve Maximum Lift  8.3 mm
 Intake Valve Timing  
 Open BTDC
 37 degrees
 Close ABDC
 67 degrees
 Duration
 284 degrees
 Exhaust Valve Timing  
 Open BBDC
 69 degrees
 Close ATDC
 33 degrees
 Duration
 282 degrees
 Valve Timing Measuring Point  0.2 mm Intake, 0.3 mm Exhaust
 Fuel Delivery System  Mikuni Fuel Injection
 Throttle Body Venturi Size  45 mm
 Air Filter Type  Pleated Paper
 Exhaust System Type  4-1-2
 Ignition System  Digital
 Lubrication System  Wet Sump
 Oil Capacity  4 quarts
 Fuel Capacity  4.8 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)  65/ 43 (1.512:1)
 Final Drive Sprocket Teeth (Ratio)  45/ 17 (2.647:1)
 Transmission Gear Teeth (Ratios)  
 6th
 33/ 26 (1.269:1)
 5th
 30/ 22 (1.364:1)
 4th
 35/ 23 (1.522:1)
 3rd
 37/ 21 (1.762:1)
 2nd
 33/ 16 (2.063:1)
 1st
 38/ 15 (2.533:1)
 Transmission Overall Ratios  
 6th
 5.079:1
 5th
 5.459:1
 4th
 6.091:1
 3rd
 7.052:1
 2nd
 8.257:1
 1st
 10.138:1