Yamaha R6
121 hp, 600 cc, 401 lbs2003 - 2004
Kawasaki ZX-9R
143 hp, 899 cc, 448 lbs2000
EngineYamaha R6Kawasaki ZX-9R
Displacement600 cc899 cc
Max power121 hp (@13 000 RPM)143 hp (@11 000 RPM)
Max torque44 lb ft (@12 000 RPM)74 lb ft (@9 000 RPM)
Redline15 500 RPM12 000 RPM
Idling speed1 100 RPM
ManagementFuel InjectionCarburetor
LayoutDOHC Inline-4DOHC Inline-4
Compression12.40:111.50:1
Oil capacity3.22 quart
Oil type10W40, Motul 300V 10W40, Shell Rotella 10W40
Spark plug typeNGK CR9EK, NGK CR10EKNGK CR9EK, ND U24ETR
CoolingLiquidLiquid
Valves1616
Bore65.5 mm75.0 mm
Stroke44.5 mm50.9 mm
Throttle bore38.0 mm43.0 mm
Weight to power3.32 lbs/hp3.13 lbs/hp
Power to weight753 hp/2500lbs798 hp/2500lbs
Battery type12 V 8 Ah, GT9B-4
GearboxYamaha R6Kawasaki ZX-9R
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type
Gears count66
Primary ratio1.9551.714
Final drive3.02.563
1. gear2.846 (68 mph)2.571 (78 mph)
2. gear1.947 (100 mph)1.941 (102 mph)
3. gear1.556 (125 mph)1.556 (128 mph)
4. gear1.333 (146 mph)1.333 (149 mph)
5. gear1.19 (164 mph)1.2 (166 mph)
6. gear1.083 (180 mph)1.095 (181 mph)
ChasisYamaha R6Kawasaki ZX-9R
Frame typeDiamondAluminum twin-spar
Front susp.Telescopic fork USD, 4.72 in travel46mm USD, 4.72 in travel
Rear susp.Swingarm link, spring/gas-oil damperMonoshock, 5.31 in travel