'04 YZFR1

 Engine Configuration  Inline Four, 4-Stroke, DOHC
 Engine Displacement 998 cc
 Engine Cooling System  Liquid
 Compression Ratio 12.4: 1
 Combustion Chamber Design N.A.
 Valves Per Cylinder 5
Intake Valves Per Cylinder
3

  Exhaust Valves Per Cylinder
 2
 Bore x Stroke 77.0 mm x 53.6 mm (3.0 inches x 2.1 inches)
 Claimed Peak Horsepower 180 bhp @ 12,500 rpm
 Claimed Peak Torque 81.2 lbs. - ft. @ 10,500 rpm
 Engine Redline 13, 750 rpm
 Valve Angle (Included) 8.75 degrees intake, 15.75 degrees Exhaust (24.25 degrees)
 Combustion Chamber Volume 13 cc
 Valve Train Type Link-plate Chain Drive,
Bucket Followers, Shim-under-bucket
Lash Adjustment
 Valve Adjustment Interval 26,600 miles
 Intake Valve Diameter 23.6 mm
 Exhaust Valve Diameter 25.1 mm
 Intake Valve Stem Diameter 4 mm
 Exhaust Valve Stem Diameter 4.5 mm
 Intake Valve Maximum Lift 7.6 mm
 Exhaust Valve Maximum Lift 7.5 mm
 Intake Valve Timing
Open BTDC
41 degrees
Close ABDC
 71 degrees
Duration
292 degrees
 Exhaust Valve Timing
Open BBDC
67 degrees
Close ATDC
37 degrees
Duration
284 degrees
 Valve Timing Measuring Point 0.2 mm Intake ; 0.3 mm Exhaust
 Fuel Delivery System Fuel Injection
Throttle Body Venturi Size 45 mm
 Air Filter Type Paper Element
 Exhaust System Type 4-1
 Ignition System Digital Electronic
 Lubrication System Wet Sump
 Oil Capacity 4.1 quarts (3.8 liters)
 Fuel Capacity 4.8 gallons (18.0 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 17
 Drive Plates
9
 Driven Plates
8
 Primary Drive Gear
 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
 Theoretical Speed in Gears at Redline  

6th
197 mph

5th
183 mph

4th
164 mph

3rd
142 mph

2nd
121 mph

1st
99 mph