| MODEL | KTM 400 EXC 2009 - 2010 |
| Year | 2009 - 2010 |
| Engine Type | Four stroke, single cylinder, SOHC, 4 valves |
| Displacement / Capacity | 393 cc / 24.0 cu in |
| Bore X Stroke | 95 x 55.5 mm |
| Compression Ratio | 11.1:1 |
| Cooling System | Liquid cooled |
| Max Power | 32.1 kW / 44 hp @ 8000 rpm |
| Max Torque | — |
| Ignition | Kokusan contactless DC-CDI with digital advanced system |
| Induction | Keihin MX-FCR 3900D |
| Start System | Electric & kick |
| TRANSMISSION SPECS | |
| Lubrication | Engine oil capacity 0.6 Litres / 0.6 US qt / 0.5 Imp qt |
| Gear Box | 6 speed; primary 33:76; 1st 14:36, 2nd 17:32, 3rd 19:28, 4th 22:26, 5th 24:23, 6th 26:21 |
| Clutch | Wet, multiplate |
| Final Drive | Chain, X-ring 5/8 x 1/4 in; final drive ratio 15:45 |
| CHASSIS SPECS | |
| Frame | Central tube chrome-moly main frame, aluminium swingarm; steering head 63.5 deg |
| Front Suspension | WP 4860 MXMA PA upside-down fork, 300 mm / 11.8 in travel |
| Rear Suspension | Fully adjustable WP PDS 5018 DCC shock, 335 mm / 13.2 in travel |
| Front Brakes | Single 260 mm disc, Brembo double piston floating caliper, sintered pad |
| Rear Brakes | Single 220 mm disc, Brembo single piston floating caliper, organic pad |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 985 mm / 38.8 in |
| Wheelbase | 1475 mm / 57.1 in |
| Ground Clearance | 380 mm / 15.0 in |
| Dry Weight | 114 kg / 251 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 90/90 - 21 Metzeler MCE 6 Days Extreme |
| Rear Tyre | 140/80 - 18 Metzeler MCE 6 Days Extreme |
| FUEL SYSTEM | |
| Fuel Capacity | 9 Litres / 2.4 US gal / 2.0 Imp gal (2 Litres reserve) |
| Fuel Consumption | — |
| Top Speed | — |
The 2009 update of the 400 EXC enduro moved to a short-stroke engine, which the source presents as the best all-round dirt bike in KTM's range, combining motocross performance with enduro rideability. Changes listed include titanium valves, a magnesium cylinder-head cover and a new hot-start system to make restarting after a fall easier.
