Page 14 of 396

Cooling system ...................................8-23
Spark plug inspection .........................8-39
Air filter cleaning .................................8-43
Carburetor settings .............................8-51
Idle speed adjustment ........................8-67
Throttle lever adjustment ....................8-71
Front and rear brake pad
inspection .........................................8-73
Brake fluid level check ........................8-75
Brake fluid replacement ......................8-79
Front brake lever free play .................8-81
Brake pedal height adjustment ...........8-83
Parking brake adjustment ...................8-85
Adjusting the rear brake light switch ...8-89
Clutch adjustment ...............................8-91
Drive chain slack check ......................8-91
Drive chain slack adjustment ..............8-93
Lubricating the drive chain .................8-95
Cable inspection and lubrication ........8-99Brake and shift pedal/brake and
clutch lever lubrication ....................8-101
Front upper and lower arm pivot
lubrication .......................................8-101
Rear arm pivot lubrication ................8-103
Wheel removal .................................8-105
Wheel installation .............................8-105
Replacing the headlight bulb ............8-107
Headlight beam adjustment ..............8-109
Tail/brake light bulb replacement .....8-111
Troubleshooting ................................8-113
Troubleshooting chart .......................8-117
CLEANING AND STORAGE ...................9-1
A. Cleaning ...........................................9-1
B. Storage ............................................9-7
SPECIFICATIONS .................................10-1
10
9
Page 48 of 396
3-1
EBU00032
DESCRIPTION AND MACHINE
IDENTIFICATION
1. Tail/brake light 13. Rear wheel
2. Seat 14. Starter (choke)
3. Kick starter 15. Shift pedal
4. Fuel tank cap 16. Clutch lever
5. Headlight 17. Parking brake
6. Brake pedal 18. Main switch
7. Rear brake light switch 19. Front brake lever
8. Front wheel 20. Throttle lever
9. Front shock absorber 21. Handlebar switch
10. Radiator
11. Fuel cock
12. Rear shock absorber
NOTE:
The machine you have purchased may differ
slightly from those shown in the figures of this
manual.
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Page 96 of 396
5-1
EBU00113
PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brakes9Check operation, free play, fluid level and fluid leakage. 5-5–5-9
9Fill with DOT 4 brake fluid if necessary. 8-73–8-83
Clutch9Check operation, condition and lever free play. 8-91
Parking brake9Check operation, condition and free play. 8-85–8-87
Fuel9Check fuel level.
9Fill with fuel if necessary.5-11–5-13
Transmission oil9Check oil level.
9Fill with oil if necessary.5-17, 8-17–8-23
Coolant reservoir 9Check coolant level.
9Fill with coolant if necessary.8-23–8-37
Drive chain9Check chain slack and condition.
9Adjust if necessary.5-21, 8-91–8-97
Throttle9Check for proper throttle cable operation. 5-21, 8-71
Wheels and tires9Check tire pressure, wear and damage. 5-25–5-31, 8-105
Fittings and Fasteners9Check all fittings and fasteners. 5-21
Lights and switches9Check for proper operation. 5-23, 8-107–8-111
Page 118 of 396
5-23
EBU10030
Lights
Check the headlights and tail/brake light to make
sure they are in working condition. Repair as
necessary for proper operation.
EBU11700
Switches
Check the operation of all switches. Have a
Yamaha dealer repair as necessary for proper
operation.
Page 136 of 396
6-9
EBU00180
Starting a warm engine
To start a warm engine, refer to the “Starting a
cold engine” section. The starter (choke) should
not be used. The throttle should be opened
slightly.
EBU00538
Warming up
To get maximum engine life, always warm up
the engine before starting off. Never accelerate
hard with a cold engine! To see whether or not
the engine is warm, check if it responds to the
throttle normally with the starter (choke) turned
off.
NOTE:
When the parking brake is used, engine speed
is limited to 2,300 r/min. Be sure the parking
brake is released before moving the throttle
lever. Otherwise, the engine will misfire, pre-
venting normal operation.
Page 334 of 396
8-89
EBU00833
Adjusting the rear brake light switch
The rear brake light switch, which is activated by
the brake pedal and brake lever, is properly
adjusted when the brake light comes on just
before braking takes effect. If necessary, adjust
the brake light switch as follows.
Turn the adjusting nut while holding the rear
brake light switch in place. To make the brake
light come on earlier, turn the adjusting nut in
directiona. To make the brake light come on
later, turn the adjusting nut in direction b.1
2
a
b
1. Rear brake light switch
2. Adjusting nut
1. Contacteur de feu stop sur frein arrière
2. Écrou de réglage
1. Interruptor de la luz de freno trasero
2. Tuerca de ajuste
Page 356 of 396
8-111
EBU00861
Tail/brake light bulb replacement
1. Remove the bulb holder (together with the
bulb) by turning it counterclockwise.
2. Remove the defective bulb from the bulb
holder by pushing it inward and turning it
counterclockwise.
3. Install a new bulb in the bulb holder by
pushing it inward and turning it clockwise.
4. Install the bulb holder (together with the
bulb).
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1. Bulb holder
1. Fixation d’ampoule
1. Portabombillas
1. Bulb holder 2. Bulb
1. Fixation d’ampoule 2. Ampoule
1. Portabombillas 2. Bombilla
Page 382 of 396
10-5
Model YFZ350
Suspension:
Front suspension Double wishbone
Rear suspension Swingarm (link suspension)
Shock absorber:
Front shock absorber Coil spring/Oil damper
Rear shock absorber Coil spring/Gas-oil damper
Wheel travel:
Front wheel travel 230 mm
Rear wheel travel 220 mm
Electrical:
Ignition system C.D.I.
Generator system A.C. magneto
Headlight type: Krypton bulb
Bulb voltage, wattage ×quantity:
Headlight 12V, 30 W/30 W ×2
Tail/brake light 12V, 5 W/21 W ×1