Suzuki drz 400E Service Manual

FUEL AND LUBRICATION SYSTEM 4-7
MAIN SYSTEM
As the piston valve 1 is opened, engine speed rises and vacuum in the venturi A is increased.
The fuel in the float chamber 2 is metered by the main jet 3. The metered fuel enters the needle jet 4,
mixes with the air admitted through the main air jet 5, and then forms an emulsion.
The emulsified fuel then passes through the clearance between the needle jet 4 and jet needle 6, and is
discharged into the venturi A, in which it meets the main air stream being drawn by the engine.
Mixture proportioning is accomplished in the needle jet 4. The clearance through which the emulsified fuel
must flow depends ultimately on the throttle position.

Suzuki drz 400E Specifications

General

Displacement	398 cc
Compression Ratio	12.2:1
Ignition	Electronic ignition (CDI)
Transmission	5-speed constant mesh
Rear Suspension	Link type, coil spring, oil damped
Front Tire	80/100-21
Rear Tire	110/100-18
Engine Type	4-stroke, DOHC
Bore x Stroke	90.0 mm x 62.6 mm
Fuel System	Mikuni BSR36 carburetor
Front Brakes	Disc
Rear Brakes	Disc
Fuel Tank Capacity	10.0 L (2.6 US gallons)
Overall Width	825mm (32.5 inches)
Ground Clearance	315 mm (12.4 in)
Seat Height	935 mm (36.8 in.)
Curb Weight	138 kg (304 lbs)
Dry Weight	119 kg (262 lbs.)