Suzuki drz 400 2002 Service Manual

4-10 FUEL AND LUBRICATION SYSTEM
CLEANING
A WARNING
Some carburetor cleaning chemicals , especially dip-
type soaking solutions , are very corrosive and must
be handled carefully . Always follow the chemical
manufacturer 's instructions for proper use, handling
and storage.
• Clean a ll jels wilh a spray-Iype carburelor cleaner and dry
them using compressed air.
• Clean all circuits 01 the carburetor Ihoroughly-nol just the
perceived problem area.
Clean the circuils in Ihe carburelor
body wilh a spray-type cleaner.
If necessary, soak each cir-
cuit in a dip-type cleaning solution to loosen dirl and varnish.
Dry
Ihe carburetor body using compressed air.
_A CAUTION ]
Do not use wire to clean the passageways, valve seat,
and jets . If the GUIIIJJulI~nl:s c~nnot be cleaned with a
spray-type cleaner it may be necessary to soak them
in a dip-type cleaning solution. Always follow the chemi-
cal
manufacturer 's instructions for proper use and
cleaning of the carburetor components.
• After cleaning, reassemble Ihe carburetor with new O-rings.
[A CAUTION ]
Replace the removed O-rings with new ones .
INSPECTION
Check Ihe following ilems for any damage or clogging. If any
u""'''Y'''' "'" fuurru , '''fJ1",,,,, tI,,, u"lTIaged parts with new ones.
* Pilol jel * Valve seat
* Main jet * Jel needle
* Main air jel * Piston valve
* Pilol air jel * Starler (enricher) jet
* Needle jet air bleeding hoi * O-ring
* Float * Throttle valve
* Needle valve * Diaphragm
* Pilol outlet and bypass ports
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Suzuki drz 400 2002 Specifications

General

Displacement	398 cc
Bore x Stroke	90.0 mm x 62.6 mm
Compression Ratio	11.3:1
Cooling System	Liquid-cooled
Fuel System	Mikuni BSR36 carburetor
Starter	Electric
Transmission	5-speed constant mesh
Final Drive	Chain
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Front Tire	80/100-21
Seat Height	935 mm (36.8 in)
Ground Clearance	300 mm (11.8 in)
Wheelbase	1, 485 mm (58.5 in)
Dry Weight	119 kg (262 lbs)
Engine Type	4-stroke, single cylinder, DOHC
Ignition	CDI
Front Brakes	Disc
Rear Brakes	Disc
Rear Tire	120/90-18
Fuel Capacity	10.0 L (2.6 US gal)