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2017 Yamaha YZF-R1

Engine Configuration Crossplane Inline Four, 4-Stroke
Engine Displacement 998 cc
Engine Cooling
Compression Ratio 13.0:1
Combustion Chamber Design
Valves Per Cylinder 4
Intake Valves Per Cylinder
Exhaust Valves Per Cylinder
Bore x Stroke 79.0 mm x 50.9 mm
Conecting Rod Length
(center-to-center)
102 mm
Connecting Rod Material Titanium
Claimed Peak Horsepower
Claimed Peak Torque
Engine Redline "Claimed" 14,600 rpm
Valve Angle (Included) 11.5 degrees intake/ 13.0 degrees exhaust (24.5 degrees)
Combustion Chamber Volume 20.8 cc
Valve Train Type DOHC, Gear/Link-plate Chain Drive, Finger Followers, Shim-in-retainer Adjustment
Valve Adjustment Interval
Intake Valve Diameter 33.0 mm (titanium)
Exhaust Valve Diameter 26.5 mm (stainless steel)
Intake Valve Stem Diameter
Exhaust Valve Stem Diameter
Intake Valve Maximum Lift 9.7 mm
Exhaust Valve Maximum Lift 8.8 mm
Intake Valve Timing
Open BTDC 34 degrees
Close ABDC 70 degrees
Duration 284 degrees
Exhaust Valve Timing
Open BTDC 70 degrees
Close ABDC 30 degrees
Duration 280degrees
Valve Timing Measuring Point 0.15mm (Intake) 0.25mm (Exhaust) (lift)
Fuel Delivery System
Throttle Body Venturi Size 45mm
Air Filter Type
Exhaust System Type 4-2-1 (titanium/stainless steel)
Ignition System
Lubrication System
Oil Capacity
Fuel Capacity
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
Number of Clutch Plates
Drive Plates
Driven Plates
Primary Drive Gear (straight cut)
Primary Drive Gear Teeth (Ratio) 67/41 (1.634:1)
Final Drive Sprocket Teeth (Ratio) 41/16 (2.563:1)
Transmission Gear Teeth (Ratios)
6th 30/24 (1.250:1)
5th 29/21 (1.381:1)
4th 30/19 (1.579:1)
3rd 35/19 (1.842:1)
2nd 37/17 (2.176:1)
1st 39/15 (2.600:1)
Transmission Overall Ratios
6th
5th
4th
3rd
2nd
1st