Kawasaki W 400


Make Model

Kawasaki W 400


2006 - 07


Four stroke, parallel twin cylinder, SOHC, 4 valve per cylinder


399 cc / 24.3 cu-in
Bore x Stroke

72 x 49 mm

Cooling System Air cooled
Compression Ratio



2x Keihin CVK30 carburetors


Digital with K-TRIC

Starting Electric

Max Power

29 hp / 21.6 kW @ 7500 rpm
Max Torque 29 Nm / 21.4 lb-ft @ 6000 rpm
Transmission 5 Speed

Final  Drive

Gear Ratio 1st 2.733, 2nd 1.947, 3rd 1.435, 4th 1.154, 5th 0.969
Frame Double cradle

Front Suspension

39 mm telescopic fork

Front Wheel Travel 130 mm / 5.1 in

Rear Suspension

Twin shocks with 5-way spring preload adjustment

Rear Wheel Travel 105 mm /

Front Brakes

Single 300mm disc 2 piston caliper

Rear Brakes

160mm drum

Front Tyre


Rear Tyre


Wheelbase 1460 mm / 57.5 in
Seat Height 765 mm / 30.1 in
Ground Clearance 125 mm / 4.9 in

Dry Weight

193 kg / 425.5 lbs

Fuel Capacity 

14 Litres / 3.7 US gal

The W4000 is one of Kawasaki's most recent designs. it uses the retro styling of Kawasaki's Wl, first built in the 1960s. Its air-cooled parallel twin engine has rounded cases and fins designed to recreate 30-year-old styling, and uses a bevel drive shaft to operate the overhead cam. The rest of the bike also harks back to the past. The fuel tank wears rubber kneepads, the low-slung silencers use a classic peashooter design, and the rubber fork gaitors and kickstart would almost convince the casual observer that this was indeed a bike from the 1960s. The W400 isn't totally devoid of modern components though. The engine has electric start, and the front disc brake is decidedly up-to-date.