2001 YAMAHA YFM400F oil

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CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ....................... 1-1
SAFETY INFORMATION ........................ 2-1
DESCRIPTION AND MACHINE
IDENTIFICATION .................................... 3-1
Identification number records ........... 3-3
Key identification number ................. 3-5
Vehicle identification number ........... 3-5
Model label ......................................... 3-7
CONTROL FUNCTIONS ......................... 4-1
Main switch......................................... 4-1
Indicator lights .................................... 4-3
Coolant temperature indicator light
checking method .............................. 4-7
Speedometer .................................... 4-11
Fuel gauge ........................................ 4-13
Handlebar switches .......................... 4-15
Throttle lever .................................... 4-21
Speed limiter .................................... 4-23
Front brake lever .............................. 4-25Rear brake pedal and lever.............. 4-27
Drive select lever .............................. 4-29
Recoil starter..................................... 4-29
Fuel tank cap..................................... 4-31
Fuel cock ........................................... 4-33
Starter (choke) “ ” ........................ 4-35
Seat ................................................... 4-37
Storage box ...................................... 4-39
Front carrier ...................................... 4-39
Rear carrier ....................................... 4-39
Front shock absorber
adjustment...................................... 4-41
Rear shock absorber
adjustment...................................... 4-45
Auxiliary DC jack .............................. 4-49
PRE-OPERATION CHECKS .................... 5-1
Front and rear brakes......................... 5-7
Fuel .................................................... 5-11
Engine oil .......................................... 5-15
Final gear oil ..................................... 5-19
Differential gear oil .......................... 5-21
Throttle lever .................................... 5-21
Fittings and Fasteners...................... 5-21
1234
5

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Lights ................................................ 5-23
Switches ........................................... 5-23
Tires .................................................. 5-25
How to measure tire pressure ........ 5-29
Tire wear limit .................................. 5-31
OPERATION ........................................... 6-1
Starting a cold engine ....................... 6-3
Starting a warm engine ..................... 6-9
Warming up ........................................ 6-9
Drive select lever operation and
reverse driving ............................... 6-11
Engine break-in ................................ 6-17
Parking .............................................. 6-19
Parking on a slope ........................... 6-21
Accessories and loading ................. 6-23
RIDING YOUR ATV ................................ 7-1
Getting to know your ATV ................. 7-3
Ride with care and good
judgement ........................................ 7-5
Be careful where you ride ............... 7-27
Turning your ATV ............................ 7-39
Climbing uphill ................................. 7-45
Riding downhill ................................ 7-55
Crossing a slope ............................... 7-59Crossing through shallow
water ............................................... 7-63
Riding over rough terrain ................ 7-69
Sliding and skidding ........................ 7-71
What to do if ..................................... 7-75
What to do... ..................................... 7-75
PERIODIC MAINTENANCE AND
ADJUSTMENT ....................................... 8-1
Owner’s manual and tool kit ............. 8-3
Periodic maintenance/
lubrication ........................................ 8-7
Panel removal and installation ....... 8-15
Engine oil .......................................... 8-31
Final gear oil ..................................... 8-41
Differential gear oil .......................... 8-47
Cooling system ................................ 8-53
Changing the coolant ...................... 8-57
Front axle boots ............................... 8-63
Spark plug ........................................ 8-65
Air filter cleaning.............................. 8-71
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3-1
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DESCRIPTION AND MACHINE
IDENTIFICATION
1. Rear spring preload
adjusting ring
2. Storage box and tool kit
3. Spark plug
4. Rear brake fluid
reservoir
5. Radiator cap
6. Front spring preload
adjusting ring
7. V-belt case
8. Rear brake pedal
9. Front spring preload
adjusting ring
10. Fuel cock
11. Air filter case
12. Fuses13. V-belt cooling duct
check hose
14. Coolant reservoir
15. Oil filter cartridge
16. Engine oil dipstick
17. Rear brake lever
18. Left handlebar switches
19. Starter (choke)
20. Horn switch
21. Drive select lever
22. Speedometer
23. Main switch
24. Fuel tank cap
25. Auxiliary DC jack
26. Right handlebar switch
27. Throttle lever
28. Front brake lever
NOTE:

The machine you have purchased may differ
slightly from those shown in the figures of this
manual.

4-29
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Drive select lever
The drive select lever is used to shift your ma-
chine into the low, high, neutral, reverse and
park positions. (Refer to pages 6-11 ~ 6-15 for
the drive select lever operation.)
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Recoil starter
Firmly grasp the handle and pull slightly until
engagement can be felt. Then pull forcefully,
being careful not to pull the rope all the way
out.
WARNING
Shift the transmission in neutral or set the
shift lever to the park position before starting
the engine or the ATV could start to move un-expectedly, which could cause an accident.
1. Drive select lever
1. Levier de présélection
1. Palanca de selección de marcha1. Recoil starter
1. Lanceur à réenroulement
1. Arranque por tracción de cable

5-1
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PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brakes
• Check operation, free play, fluid level and fluid leakage.
• Fill with DOT 4 brake fluid if necessary.5-7 ~ 5-9,
8-91 ~ 8-95
Fuel
• Check fuel level.
• Fill with fuel if necessary.5-11 ~ 5-13
Engine oil
• Check oil level.
• Fill with oil if necessary.5-15 ~ 5-17,
8-31 ~ 8-41
Coolant reservoir
• Check coolant level.
• Fill with coolant if necessary.8-53 ~ 8-63
Final gear oil/
Differential gear oil
• Check for leakage. 5-19, 8-41 ~ 8-51
Throttle
• Check for proper throttle cable operation. 5-21, 8-87
Wheels and tires
• Check tire pressure, wear and damage.5-25 ~ 5-31,
8-107 ~ 8-109
Fittings and Fasteners
• Check all fittings and fasteners. 5-21
Lights
• Check for proper operation. 5-23, 8-121 ~ 8-127
Front axle boots
• Check for damage. 8-63

5-15
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Engine oil
Make sure the engine oil is at the specified lev-
el. Fill with oil as necessary. (See pages 8-31 ~
8-41 for details.)
-20°
-10°0°10°20°30°40°
50°C
5W/30
10W/30
10W/40
20W/50
15W/4020W/40
Recommended oil:
Recommended engine oil classification:
API Service SE, SF, SG type or higher

5-17
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CAUTION:

Be sure to use motor oils that do not contain
anti-friction modifiers. Passenger car motor
oils (often labeled “Energy Conserving”) con-
tain anti-friction additives which will cause
clutch and/or starter clutch slippage, resulting
in reduced component life and poor engine
performance.
Oil quantity:
Total amount:
2.6 L
Periodic oil change:
2.3 L
With oil filter replacement:
2.4 L

5-19
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Final gear oil
Make sure the final gear oil is at the specified
level. Add oil as necessary. (See pages 8-41 ~
8-45 for details.)
If desired, an SAE 80W90 hypoid gear oil may
be used for all conditions.
NOTE:

GL-4 is a quality and additive rating, GL-5 or
GL-6 rated hypoid gear oils may also be used.Recommended oil:
SAE 80 API GL-4 Hypoid gear oil