2012 Yamaha YZF-R1

Engine Configuration Inline four-stroke, with crossplane crankshaft
Engine Displacement 998 cc
Engine Cooling 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 (Stainless Steel)
Bore x Stroke 78.0 mm x 52.2 mm
Conecting Rod Length
Connecting Rod Material Chrome-molly Steel
Claimed Peak Horsepower 178 bhp @ 12,500 rpm
Claimed Peak Torque 84.45 lbs. - ft. @ 10,000 rpm
Engine Redline 13,750 rpm
Valve Angle (Included) 12.0 degrees Intake/ 12.5 degrees Exhaust (24.5 degrees)
Combustion Chamber Volume 23.02cc
Valve Train Type DOHC, Link-plate Chain Drive, Bucketr Followers,Shim-Under-Bucket Lash Adjustment
Valve Adjustment Interval 26,600 miles
Intake Valve Diameter 31.0 mm
Exhaust Valve Diameter 25.0 mm
Intake Valve Stem Diameter 5.0 mm
Exhaust Valve Stem Diameter 4.5mm
Intake Valve Maximum Lift 9..1 mm
Exhaust Valve Maximum Lift 8.2mm
Intake Valve Timing  
Open BTDC 37 degrees
Close ABDC 67 degrees
Duration 284 degrees
Exhaust Valve Timing  
Open BTDC 61 degrees
Close ABDC 31 degrees
Duration 272 degrees
Valve Timing Measuring Point 0.15mm (Intake), 0.25mm (Exhaust) (lift)
Fuel Delivery System Mikuni Fuel Injection
Throttle Body Venturi Size 45 mm
Air Filter Type Pleated Paper Element
Exhaust System Type 4-1-2 (Stainless Steel/Titanium)
Ignition System Digital
Lubrication System Wet Sump
Oil Capacity 4.0 quarts (3.8 liters)
Fuel Capacity 4.8 gallons (18.0 liters)
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) 47/17 (2.765:1)
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 5.305:1
5th 5.702:1
4th 6.636:1
3rd 7.366:1
2nd 8.652:1
1st 10.589:1