2002 YAMAHA DT125R suspension

3-12
INSTRUMENT AND CONTROL FUNCTIONS
3
EAU00261
Helmet holderTo open the helmet holder, insert the
key into the lock, and then turn the
key as shown.
To lock the helmet holder, turn the
key to the original position, and then
remove it.
EW000030
wNever ride with a helmet attached
to the helmet holder, since the hel-
met may hit objects, causing loss
of control and possibly an acci-
dent.
1
1. Open.
EAU03591
Adjusting the shock
absorber assemblyThis shock absorber assembly is
equipped with a spring preload
adjusting nut.
EC000015
cCNever attempt to turn an adjusting
mechanism beyond the maximum
or minimum settings.
b
a21
1. Locknut
2. Adjusting nutAdjust the spring preload as follows.
1. Loosen the locknut.
2. To increase the spring preload
and thereby harden the suspen-
sion, turn the adjusting nut in
direction a. To decrease the
spring preload and thereby soft-
en the suspension, turn the
adjusting nut in direction b.
3MB-9-E8 6/13/01 10:55 AM Page 24

6-3
PERIODIC MAINTENANCE AND MINOR REPAIR
6
9
*Wheels•Check runout, spoke tightness and for damage.
•Tighten spokes if necessary.√√√√
10*Tires•Check tread depth and for damage.
•Replace if necessary.
•Check air pressure.
•Correct if necessary.√√√√ √
11*Wheel bearings•Check bearing for looseness or damage.√√√√
12*Swingarm•Check operation and for excessive play.√√√√
13 Drive chain•Check chain slack.
•Make sure that the rear wheel is properly aligned.
•Clean and lubricate.Every 500 km and after washing
the motorcycle or riding in the rain.
14*Steering bearings•Check bearing play and steering for roughness.√√√√√
•Lubricate with lithium-soap-based grease.Every 24,000 km
15*Chassis fasteners•Make sure that all nuts, bolts and screws are properly tightened.√√√√ √
16 Sidestand•Check operation.
•Lubricate.√√√√ √
17*Sidestand switch•Check operation.√√√√√ √
18*Front fork•Check operation and for oil leakage.√√√√
19*Shock absorber
assembly•Check operation and shock absorber for oil leakage.√√√√
20*Rear suspension relay
arm and connecting arm
pivoting points•Check operation.√√√√
•Lubricate with lithium-soap-based grease.√√ NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1,000 km)
ANNUAL
CHECK
1 6 12 18 24
3MB-9-E8 6/13/01 10:55 AM Page 40

6-19
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU04259
TiresTo maximize the performance, dura-
bility, and safe operation of your
motorcycle, note the following points
regarding the specified tires.
Tire air pressure
The tire air pressure should be
checked and, if necessary, adjusted
before each ride.
EW000082
w8The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the tempera-
ture of the tires equals the
ambient temperature).
8The tire air pressure must be
adjusted in accordance with
the riding speed and with the
total weight of rider, passen-
ger, cargo, and accessories
approved for this model.
8NEVER OVERLOAD THE
MOTORCYCLE! Operation of
an overloaded motorcycle may
result in tire damage, loss of
control, or severe injury. Make
sure that the total weight of
rider, passenger, cargo, and
accessories does not exceed
the specified maximum load
for the vehicle.
8Do not carry along loosely
packed items, which can shift
during a ride.
8Securely pack the heaviest
items close to the center of the
motorcycle and distribute the
weight evenly on both sides.
8Adjust the suspension and tire
air pressure with regard to the
load.
8Check the tire condition and
air pressure before each ride.
EWA00012
wBecause loading has an enormous
impact on the handling, braking,
performance and safety character-
istics of your motorcycle, you
should keep the following precau-
tions in mind.
Tire air pressure
(measured on cold tires)
Load* Front Rear
Up to 90 kg125 kPa
(1.25 kgf/cm
2,
1.25 bar)150 kPa
(1.50 kgf/cm
2,
1.50 bar)
90 kg–
maximum150 kPa
(1.50 kgf/cm
2,
1.50 bar175 kPa
(1.75 kgf/cm
2,
1.75 bar)
Off-road riding125 kPa
(1.25 kgf/cm
2,
1.25 bar)150 kPa
(1.50 kgf/cm
2,
1.50 bar)
Maximum load*180 kg
178 kg (CH, A only)
* Total weight of rider, passenger, cargo and
accessories
3MB-9-E8 6/13/01 10:55 AM Page 56

8-3
SPECIFICATIONS
8
90 kg load–maximum
load*
Front150 kPa (1.50 kgf/cm
2, 1.50 bar)
Rear 175 kPa (1.75 kgf/cm2, 1.75 bar)
Off-road riding
Front125 kPa (1.25 kgf/cm2, 1.25 bar)
Rear 150 kPa (1.50 kgf/cm2, 1.50 bar)
*Total weight of rider, passenger, cargo and accessories
Wheels
Front
Type Spoke wheel
Size 1.60 ×21
Rear
Type Spoke wheel
Size 1.85 ×18
Brakes
Front
Type Single disc brake
Operation Right hand operation
Fluid DOT 4Rear
Type Single disc brake
Operation Right foot operation
Fluid DOT 4
Suspension
Front Telescopic fork
Rear Swingarm (link suspension)
Shock absorber
Front Coil spring/oil damper
Rear Coil-gas spring/oil damper
Wheel travel
Front 270 mm
Rear 260 mm
Electrical
Ignition system C.D.I.
Charging system
Type A.C. magneto
Standard output 14V, 100W @ 5,000 r/min
3MB-9-E8 6/13/01 10:55 AM Page 90