Yamaha R1
170 hp, 998 cc, 428 lbs2004
Kawasaki Z750
106 hp, 748 cc, 498 lbs2007 - 2012
EngineYamaha R1Kawasaki Z750
Engine code5VX8
Displacement998 cc748 cc
Max power170 hp (@12 500 RPM)106 hp (@10 500 RPM)
Max torque78 lb ft (@10 500 RPM)57 lb ft (@8 300 RPM)
Redline13 500 RPM12 100 RPM
Idling speed1 100 RPM
ManagementFuel InjectionFuel Injection
LayoutDOHC Inline-4DOHC Inline-4
Compression12.40:111.30:1
Oil capacity3.60 quart3.22 quart
Oil type15W50, Motul 300V 15W50, Liqui Moly 15W5010W40, motul 300v 10w40, shell rotella 10w40
Spark plug typeNGK CR9EKNGK CR9EK, NGK CR9EIX
CoolingLiquidLiquid
Valves1616
Bore77.0 mm68.4 mm
Stroke53.6 mm50.9 mm
Throttle bore32.0 mm
Weight to power2.52 lbs/hp4.70 lbs/hp
Power to weight993 hp/2500lbs531 hp/2500lbs
Battery type12V 8Ah
GearboxYamaha R1Kawasaki Z750
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type525
Gears count66
Primary ratio1.5121.714
Final drive2.6472.867
1. gear2.533 (97 mph)2.571 (71 mph)
2. gear2.063 (119 mph)1.941 (94 mph)
3. gear1.762 (139 mph)1.556 (117 mph)
4. gear1.522 (161 mph)1.333 (136 mph)
5. gear1.364 (180 mph)1.2 (152 mph)
6. gear1.269 (194 mph)1.095 (166 mph)
ChasisYamaha R1Kawasaki Z750
Frame typeDiamondTubular steel, diamond
Front susp.Telescopic fork - Coil spring/oil damper (120 mm travel)Telescopic fork, 4.72 in travel
Rear susp.Swingarm (link suspension) - Coil spring/gas-oil damperSwinagarm, uni-trak, 4.92 in travel