| MODEL | KAWASAKI W 400 2006 - 2007 |
| Year | 2006 - 2007 |
| Engine Type | Four-stroke, parallel twin, SOHC, 4 valves per cylinder |
| Displacement / Capacity | 399 cc / 24.3 cu in |
| Bore X Stroke | 72 x 49 mm |
| Compression Ratio | 8.5:1 |
| Cooling System | Air-cooled |
| Max Power | 21.6 kW / 29 hp @ 7500 rpm |
| Max Torque | 29 Nm / 21.4 lb-ft @ 6000 rpm |
| Ignition | Digital with K-TRIC |
| Induction | 2 x Keihin CVK30 carburetors |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5-speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Double cradle |
| Front Suspension | 39 mm telescopic fork, 130 mm / 5.1 in travel |
| Rear Suspension | Twin shocks with 5-way spring preload adjustment, 105 mm travel |
| Front Brakes | Single 300 mm disc, 2-piston caliper |
| Rear Brakes | 160 mm drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 765 mm / 30.1 in |
| Wheelbase | 1460 mm / 57.5 in |
| Ground Clearance | 125 mm / 4.9 in |
| Dry Weight | 193 kg / 425.5 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 100/90-19 |
| Rear Tyre | 130/80-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 14 Litres / 3.7 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The W 400 is a 400 cc parallel twin with retro styling that reflects the 1960s W1, using rounded engine cases and fins and a bevel-driven overhead cam. Period details include rubber tank knee pads, low peashooter silencers and rubber fork gaiters, while electric start and a front disc brake are modern additions.
