Yamaha R6
121 hp, 600 cc, 401 lbs2003 - 2004
Kawasaki Z750
106 hp, 748 cc, 498 lbs2007 - 2012
EngineYamaha R6Kawasaki Z750
Engine code5VX8
Displacement600 cc748 cc
Max power121 hp (@13 000 RPM)106 hp (@10 500 RPM)
Max torque44 lb ft (@12 000 RPM)57 lb ft (@8 300 RPM)
Redline15 500 RPM12 100 RPM
Idling speed1 100 RPM
ManagementFuel InjectionFuel Injection
LayoutDOHC Inline-4DOHC Inline-4
Compression12.40:111.30:1
Oil capacity3.22 quart3.22 quart
Oil type10W40, Motul 300V 10W40, Shell Rotella 10W4010W40, motul 300v 10w40, shell rotella 10w40
Spark plug typeNGK CR9EK, NGK CR10EKNGK CR9EK, NGK CR9EIX
CoolingLiquidLiquid
Valves1616
Bore65.5 mm68.4 mm
Stroke44.5 mm50.9 mm
Throttle bore38.0 mm32.0 mm
Weight to power3.32 lbs/hp4.70 lbs/hp
Power to weight753 hp/2500lbs531 hp/2500lbs
Battery type12 V 8 Ah, GT9B-412V 8Ah
GearboxYamaha R6Kawasaki Z750
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type525
Gears count66
Primary ratio1.9551.714
Final drive3.02.867
1. gear2.846 (68 mph)2.571 (71 mph)
2. gear1.947 (100 mph)1.941 (94 mph)
3. gear1.556 (125 mph)1.556 (117 mph)
4. gear1.333 (146 mph)1.333 (136 mph)
5. gear1.19 (164 mph)1.2 (152 mph)
6. gear1.083 (180 mph)1.095 (166 mph)
ChasisYamaha R6Kawasaki Z750
Frame typeDiamondTubular steel, diamond
Front susp.Telescopic fork USD, 4.72 in travelTelescopic fork, 4.72 in travel
Rear susp.Swingarm link, spring/gas-oil damperSwinagarm, uni-trak, 4.92 in travel