Torquepedia
ZX-4R

ZX-4R

Kawasaki

Engine typeLiquid-cooled, 4-stroke, in-line four
Compression ratio12.3:1
Valve systemDOHC, 16 valves
Bore x stroke57.0 mm x 39.1 mm / 2.24 in x 1.54 in
Displacement399 cm³ / 24.35 in³
Fuel systemFuel injection: 34 mm x 4
LubricationForced lubrication, wet sump
Starting systemElectric
Ignition systemDigital
Maximum power57.0 kW {77 PS} / 14,500 rpm
Maximum power with ram air58.7 kW {80 PS} / 14,500 rpm
Maximum torque39.0 N•m {4.0 kgf•m} / 13,000 rpm / 28.77 lb-ft
Co2 emission120 g/km
Fuel consumption5.1 l/100km / 46.1 mpg
Transmission6-speed, return shift
ClutchWet, multi disc
Primary reduction ratio2.029 (69/34)
Gear ratios1st: 2.929 (41/14), 2nd: 2.056 (37/18), 3rd: 1.619 (34/21), 4th: 1.333 (32/24), 5th: 1.154 (30/26), 6th: 1.037 (28/27)
Final driveSealed chain
Final reduction ratio3.429 (48/14)
Frame typeTrellis, high-tensile steel
Trail97 mm / 3.82 in
Wheel travel front120 mm / 4.72 in
Wheel travel rear112 mm / 4.41 in
Tyre front120/70 ZR17 M/C (58W)
Tyre rear160/60 ZR17 M/C (69W)
Dimensions l w h1,990 mm x 765 mm x 1,110 mm / 78.35 in x 30.12 in x 43.70 in
Steering angle35° / 35°
Wheel base1,380 mm / 54.33 in
Ground clearance135 mm / 5.31 in
Fuel capacity15.0 litres / 3.96 gal
Seat height800 mm / 31.50 in
Curb mass189 kg / 416.67 lbs
Front brake typeDual semi-floating discs
Front brake diameterØ 290 mm / 11.42 in
Front brake caliper typeRadial-mount, monobloc, opposed 4-piston
Rear brake typeSingle disc
Rear brake diameterØ 220 mm / 8.66 in
Rear brake caliper typeSingle-piston
Front suspension typeInverted Separate Function fork (SFF-BP) with top-out springs
Front suspension diameterØ 37 mm / 1.46 in
Rear suspension typeHorizontal Back-link, gas-charged shock with spring preload adjustability

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