2001 YAMAHA YFM660R engine oil

Yuki_DATA2:HM00G210_YFM660R-60:YFM350TOC-E.frame
EL
EBU00015
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 and warning lights ............. 4-3
Handlebar switches.......................... 4-11
Throttle lever .................................... 4-15
Speed limiter .................................... 4-17
Clutch lever ....................................... 4-19
Front brake lever .............................. 4-19
Rear brake pedal .............................. 4-21
Parking brake .................................... 4-23
Shift pedal......................................... 4-27Reverse knob .....................................4-27
Fuel tank cap .....................................4-29
Fuel cock ............................................4-29
Starter (choke) ...................................4-31
Seat ....................................................4-33
Front shock absorber adjustment....4-35
Rear shock absorber adjustment .....4-37
PRE-OPERATION CHECKS .....................5-1
Front and rear brakes .........................5-5
Fuel.......................................................5-9
Engine oil ...........................................5-13
Coolant...............................................5-17
Chain ..................................................5-19
Throttle lever .....................................5-21
Fittings and Fasteners ......................5-21
Lights .................................................5-21
Switches ............................................5-21
Tires ...................................................5-23
How to measure tire pressure .........5-27
Tire wear limit ...................................5-291
2
3
4
5

ER
Yuki_DATA2:HM00G210_YFM660R-60:YFM350TOC-E.frame
OPERATION ........................................... 6-1
Starting a cold engine ....................... 6-3
Starting a warm engine ..................... 6-9
Warming up ........................................ 6-9
Reverse knob operation and
reverse driving ............................... 6-11
Shifting ............................................. 6-15
To start out and accelerate .............. 6-17
To decelerate .................................... 6-21
Engine break-in ................................ 6-23
Parking .............................................. 6-27
Parking on a slope ........................... 6-29
Accessories and loading ................. 6-31
Accessories....................................... 6-31
Loading ............................................. 6-33
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 ............................... 7-59
Crossing through shallow water .... 7-63
Riding over rough terrain ................ 7-67
Sliding and skidding ........................ 7-69What to do if... .................................. 7-73
What to do... ..................................... 7-73
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 and oil filter cartridge .... 8-17
Cooling system ................................ 8-31
Changing the coolant ...................... 8-33
Spark plug inspection ...................... 8-41
Air filter element cleaning ............... 8-45
Carburetor adjustment .................... 8-51
Idle speed adjustment ..................... 8-53
Valve clearance adjustment ............ 8-55
Reverse lock release cable
adjustment ..................................... 8-55
Throttle lever adjustment ................ 8-57
Front and rear brake pad
inspection ....................................... 8-59
Brake fluid level inspection ............. 8-61
Brake fluid replacement .................. 8-65
Front brake adjustment ................... 8-67
Rear brake adjustment .................... 8-69
Parking brake adjustment ............... 8-71
Clutch lever free play adjustment .... 8-756
7
8

3-1
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-3.frameEL
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DESCRIPTION AND MACHINE
IDENTIFICATION
1. Seat
2. Fuel tank cap
3. Engine oil tank
4. Rear brake pedal
5. Headlight
6. Fuel cock
7. Throttle stop screw
8. Coolant reservoir
9. Tail/brake light10. Shift pedal
11. Clutch lever
12. Handlebar switches
13. Parking brake
14. Main switch
15. Reverse knob
16. Throttle lever
17. Front brake lever
NOTE:
The machine you have purchased may differ
slightly from those shown in the figures of this
manual.

5-1
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-5.frameEL
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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.5-5 ~ 5-7,
8-59 ~ 8-69
Clutch• Check operation, condition and lever free play. 8-75
Parking brake• Check operation, condition and cable slack. 8-71 ~ 8-73
Fuel• Check fuel level.
• Fill with fuel if necessary.5-9 ~ 5-11
Engine oil• Check oil level.
• Fill with oil if necessary.5-13 ~ 5-15,
8-17 ~ 8-29
Coolant reservoir• Check coolant level.
• Fill with coolant if necessary.5-17, 8-31
Drive chain• Check chain slack and condition.
• Adjust if necessary.5-19, 8-77 ~ 8-83
Throttle• Check for proper throttle cable operation. 5-21, 8-57
Wheels and tires• Check tire pressure, wear and damage.5-23 ~ 5-29,
8-93 ~ 8-95
Fittings and Fasteners• Check all fittings and fasteners. 5-21
Lights• Check for proper operation. 5-21, 8-105 ~ 8-115

5-13
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-5.frameEL
EBU00485
Engine oil
Make sure the engine oil is at the specified lev-
el. Fill with oil as necessary. (See pages 8-17 ~
8-29 for details.)
Te m p .
-20°-10°0°10°20°30°40°50°C
5W/30
10W/30
10W/40
20W/50
15W/40
20W/40
Recommended oil:
Recommended engine oil classification:
API Service SE, SF, SG type or higher

5-15
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-5.frameEL
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:
2.3 L
With oil filter cartridge replacement:
1.95 L
Periodic oil change:
1.9 L

8-7
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-8.frameEL
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PERIODIC MAINTENANCE/LUBRICATION
ITEM ROUTINEINITIAL EVERY
1
month3
months6
months6
months1
year
Valves*• Check valve clearance.
• Adjust if necessary.
Cooling system• Check coolant leakage.
• Repair if necessary.
• Replace coolant every 24 months.
Spark plug• Check condition.
• Adjust gap and clean.
• Replace if necessary.
Air filter element• Clean.
• Replace if necessary.Every 20~40 hours
(More often in wet or dusty areas.)
Carburetor*• Check and adjust idle speed/starter operation.
• Adjust if necessary.
Crankcase breather
system*• Check breather hose for cracks or damage.
• Replace if necessary.
Exhaust system*• Check for leakage.
• Retighten if necessary.
• Replace gasket if necessary.
Fuel line*• Check fuel hose for cracks or damage.
• Replace if necessary.
Engine oil• Replace (Warm engine before draining.)
Engine oil filter cartridge• Replace if necessary.
Drive chain• Check and adjust slack/alignment/clean/lube.
Brakes*• Check operation/fluid leakage/See NOTE Page 8-8.
• Correct if necessary.
Clutch*• Check operation.
• Adjust if necessary.

8-17
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-8.frameEL
1. Engine oil tank
2. Engine oil filler cap
3. Maximum level mark
4. Minimum level mark
1. Réservoir d’huile de moteur
2. Bouchon de remplissage de l’huile de moteur
3. Repère de niveau maximum
4. Repère de niveau minimum
1. Depósito de aceite de motor
2. Tapa de relleno de aceite de motor
3. Marca de nivel máximo
4. Marca de nivel mínimo
EBU00812
Engine oil and oil filter cartridge
The engine oil level should be checked before
each ride. In addition, the oil must be changed
and the oil filter cartridge replaced at the inter-
vals specified in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the ATV on a level surface.
2. Start the engine, warm it up until the en-
gine oil has reached a normal tempera-
ture of 60˚C, let it continue to idle for ten
seconds, and then turn the engine off.
NOTE:
To achieve the proper engine oil temperature
for an accurate oil level reading, the engine
must have first completely cooled down, and
then warmed up again for several minutes to
normal operating temperature.
3. Wait a few minutes until the oil settles, re-
move the engine oil tank filler cap, wipe
the dipstick clean, insert it back into the
filler hole (without screwing it in), and
then remove it again to check the oil level.