Tuning - Yamaha YZ125X 2023 Owner's Manual

ENGINE ............................................................................................................8-1
CARBURETOR SETTING..........................................................................8-1
ATMOSPHERIC CONDITIONS AND CARBURETOR SETTINGS ............8-1
TEST RUN..................................................................................................8-1
EFFECTS OF THE SETTING PARTS ON THE THROTTLE VALVE
OPENING ..................................................................................................8-2
MAIN JET ADJUSTMENT ..........................................................................8-2
PILOT AIR SCREW ADJUSTMENT...........................................................8-2
PILOT JET ADJUSTMENT.........................................................................8-2
JET NEEDLE ADJUSTMENT.....................................................................8-3
JET NEEDLE GROOVE POSITION ADJUSTMENT..................................8-3
RELATIONSHIP WITH THROTTLE OPENING .........................................8-4
CARBURETOR SETTING PARTS.............................................................8-4
ROAD CONDITION AND EXAMPLES OF CARBURETOR SETTING ......8-6
EXAMPLES OF CARBURETOR SETTING DEPENDING ON
SYMPTOM ................................................................................................8-6
CHANGE OF THE HEAT RANGE OF SPARK PLUGS .............................8-8
CHASSIS ..........................................................................................................8-9
SELECTION OF THE SECONDARY REDUCTION RATIO
(SPROCKET) ............................................................................................8-9
DRIVE AND REAR WHEEL SPROCKETS SETTING PARTS ..................8-9
TIRE PRESSURE.......................................................................................8-9
FRONT FORK SETTING..........................................................................8-10
CHANGE IN AMOUNT AND CHARACTERISTICS OF FORK OIL..........8-10
SETTING OF SPRING AFTER REPLACEMENT ....................................8-10
FRONT FORK SETTING PARTS.............................................................8-11
REAR SUSPENSION SETTING ..............................................................8-11
CHOOSING SET LENGTH ......................................................................8-11
SETTING OF SPRING AFTER REPLACEMENT ....................................8-12
REAR SHOCK ABSORBER SETTING PARTS .......................................8-12
SUSPENSION SETTING (FRONT FORK)...............................................8-14
SUSPENSION SETTING (REAR SHOCK ABSORBER) .........................8-15

TUNING

1
2
3
4
5
6
7
8
9
10