Yamaha R6
121 hp, 600 cc, 401 lbs2003 - 2004
Kawasaki Z900RS
110 hp, 948 cc, 474 lbs2018 - 2020
EngineYamaha R6Kawasaki Z900RS
Displacement600 cc948 cc
Max power121 hp (@13 000 RPM)110 hp (@8 500 RPM)
Max torque44 lb ft (@12 000 RPM)72 lb ft (@7 700 RPM)
Redline15 500 RPM10 000 RPM
Idling speed1 200 RPM
ManagementFuel InjectionFuel Injection
LayoutDOHC Inline-4DOHC Inline-4
Compression12.40:110.80:1
Oil capacity3.22 quart
Oil type10W40, Motul 300V 10W40, Shell Rotella 10W40
Spark plug typeNGK CR9EK, NGK CR10EK
CoolingLiquidLiquid
Valves1616
Bore65.5 mm73.4 mm
Stroke44.5 mm56.0 mm
Throttle bore38.0 mm36.0 mm
Weight to power3.32 lbs/hp4.31 lbs/hp
Power to weight753 hp/2500lbs580 hp/2500lbs
Battery type12 V 8 Ah, GT9B-4
GearboxYamaha R6Kawasaki Z900RS
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type
Gears count66
Primary ratio1.9551.627
Final drive3.02.8
1. gear2.846 (68 mph)2.917 (55 mph)
2. gear1.947 (100 mph)2.059 (79 mph)
3. gear1.556 (125 mph)1.65 (98 mph)
4. gear1.333 (146 mph)1.409 (115 mph)
5. gear1.19 (164 mph)1.222 (132 mph)
6. gear1.083 (180 mph)0.967 (167 mph)
ChasisYamaha R6Kawasaki Z900RS
Frame typeDiamondSteel trellis frame
Front susp.Telescopic fork USD, 4.72 in travel41mm USD, 4.72 in travel
Rear susp.Swingarm link, spring/gas-oil damperMonoshock, 5.51 in travel