Suzuki drz 400 2002 Service Manual

3-66 ENGINE
REED VALVE
Inspect the reed valve for carbon deposits. If carbon deposits
are found
in the reed valve, replace the reed valve with a new
one.
PAIR VALVE
Inspect that air flOWS through the PAIH (air supply) valve air inlet
port ® to the ai r outlet parts ®. If air does not flow out, replace
the PAIR (air supply) va lve with a new one.
• Connect the vacuum pump gauge to the vacuum port 01 the
PAl R valve as shown in the photograph.
• Apply negative pressure sluwly tu II", PAIR (air supply) valve
and inspect the air flow.
• If air does not Ilow out within the specified range, the PAIR
(air supply) valve is in normal condition.
• If the PAIR (air supply) valve does not function within the speci-
fied range, replace the PAIR (air supply) valve with a new
one.
a Negative pressure range:
J7.J - 60.0 kPa (280 - 450 mmHg)
am 09917-47010: Vacuum pump gauge
I A CAUTION I
Use a hand operated vacuum pump to prevent PAIR
(air supply) valve damage.
REMOUNTING
Remount the PAIR (air supply) valve assembly in the reverse
order of
removal.
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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)