Kawasaki ZX-25R
45 hp, 249 cc2020
Yamaha R6
123 hp, 599 cc, 417 lbs2015 - 2016
EngineKawasaki ZX-25RYamaha R6
Displacement249 cc599 cc
Max power45 hp (@12 000 RPM)123 hp (@14 500 RPM)
Max torque24 lb ft (@9 000 RPM)47 lb ft (@10 500 RPM)
Redline17 000 RPM16 000 RPM
Idling speed1 200 RPM1 200 RPM
ManagementFuel InjectionFuel Injection
LayoutDOHC Inline-4DOHC Inline-4
Compression13.10:1
Oil capacity3.22 quart
Oil type10W40, Yamalube 10W40, Shell Rotella 10W40
Spark plug typeNGK CR10EK
CoolingLiquidLiquid
Valves16
Bore67.0 mm
Stroke42.5 mm
Weight to power3.39 lbs/hp
Power to weight737 hp/2500lbs
Battery typeYTZ10S
GearboxKawasaki ZX-25RYamaha R6
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type
Gears count06
Primary ratio2.073
Final drive2.813
1. gear2.583 (78 mph)
2. gear2.0 (101 mph)
3. gear1.667 (121 mph)
4. gear1.444 (140 mph)
5. gear1.286 (157 mph)
6. gear1.15 (176 mph)
ChasisKawasaki ZX-25RYamaha R6
Frame typeAluminium Deltabox
Front susp.USD, dia 41mm, 4.53 in travel
Rear susp.4.72 in travel