EBU17421
TABLE OF CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS .............................. 1-1
SAFETY INFORMATION ................................ 2-1
DESCRIPTION................................................ 3-1Left view ...................................................... 3-1
Right view.................................................... 3-2
Controls and instruments............................ 3-3
INSTRUMENT AND CONTROL
FUNCTIONS ................................................... 4-1 Main switch ................................................. 4-1
Indicator lights and warning lights .............. 4-2
Self-diagnosis device .................................. 4-3
Handlebar switches .................................... 4-4
Throttle lever ............................................... 4-4
Speed limiter ............................................... 4-5
Clutch lever ................................................. 4-6
Brake lever .................................................. 4-6
Brake pedal ................................................. 4-7
Parking brake lever ..................................... 4-8
Shift pedal ................................................... 4-9
Reverse knob “REV” ................................... 4-9 Fuel tank cap ............................................ 4-10
Fuel ........................................................... 4-10
Seat .......................................................... 4-12
Adjusting the front shock absorber
assemblies (YFM70RSBH) ..................... 4-13
Adjusting the front shock absorber assemblies (YFM70RSSH/
YFM70RSXH) .......................................... 4-15
Adjusting the rear shock absorber assembly (YFM70RSBH) ........................ 4-20
Adjusting the rear shock absorber assembly (YFM70RSSH/
YFM70RSXH) .......................................... 4-22
PRE-OPERATION CHECKS .......................... 5-1 Fuel ............................................................. 5-4
Engine oil .................................................... 5-4
Coolant ....................................................... 5-4
Front and rear brakes ................................. 5-4
Throttle lever ............................................... 5-5
Drive chain .................................................. 5-5
Tires ............................................................ 5-5
Chassis fasteners ....................................... 5-7
Instruments, lights and switches ................ 5-8U2LS62E0.book Page 1 Thursday, February 25, 2016 8:44 AM
OPERATION ................................................... 6-1Starting the engine ...................................... 6-1
Shifting ........................................................ 6-2
Operating the reverse knob and driving in reverse ...................................................... 6-4
Engine break-in ........................................... 6-5
Parking ........................................................ 6-5
Parking on a slope ...................................... 6-6
Accessories and loading ............................. 6-6
RIDING YOUR ATV ........................................ 7-1 GETTING TO KNOW YOUR ATV ................ 7-2
RIDE WITH CARE AND GOOD JUDGMENT .............................................. 7-2
BE CAREFUL WHERE YOU RIDE ............... 7-8
TURNING YOUR ATV................................ 7-11
CLIMBING UPHILL ................................... 7-13
RIDING DOWNHILL .................................. 7-16
CROSSING A SLOPE................................ 7-17
CROSSING THROUGH SHALLOW WATER .................................................... 7-18
RIDING OVER ROUGH TERRAIN ............. 7-20
SLIDING AND SKIDDING.......................... 7-20
WHAT TO DO IF... ..................................... 7-21
WHAT TO DO... ......................................... 7-22 PERIODIC MAINTENANCE AND
ADJUSTMENT ............................................... 8-1
Owner’s manual and tool kit ....................... 8-2
Periodic maintenance chart for the emission control system ........................... 8-3
General maintenance and lubrication chart.......................................................... 8-5
Removing and installing the panel............ 8-10
Checking the spark plug........................... 8-10
Engine oil and oil filter element................. 8-13
Coolant ..................................................... 8-17
Cleaning the air filter element ................... 8-21
Cleaning the spark arrester ...................... 8-25
Adjusting the engine idling speed ............ 8-27
Adjusting the throttle lever free play ......... 8-28
Valve clearance......................................... 8-29
Adjusting the reverse lock release cable ....................................................... 8-29
Brakes....................................................... 8-29
Checking the front and rear brake pads... 8-29
Checking the brake fluid level .................. 8-31
Changing the brake fluid .......................... 8-33
Checking the front brake lever free play... 8-33
Checking the brake pedal height.............. 8-34
Adjusting the parking brake free play ....... 8-34
Brake light switches ................................. 8-36
Adjusting the clutch lever free play .......... 8-36U2LS62E0.book Page 2 Thursday, February 25, 2016 8:44 AM
Drive chain slack ....................................... 8-38
Lubricating the drive chain........................ 8-40
Checking and lubricating the cables......... 8-40
Checking and lubricating the brake and clutch levers ............................................ 8-41
Checking the shift pedal ........................... 8-41
Checking and lubricating the brake pedal ....................................................... 8-41
Checking the wheel hub bearings............. 8-42
Lubricating the swingarm pivots ............... 8-42
Lubricating the rear suspension relay arm and connecting arm pivoting points ....... 8-43
Lubricating the upper and lower arm pivots ...................................................... 8-44
Lubricating the steering shaft ................... 8-45
Battery....................................................... 8-45
Replacing a fuse ....................................... 8-48
Replacing a headlight bulb ....................... 8-50
Adjusting a headlight beam ...................... 8-51
Tail/brake light........................................... 8-52
Removing a wheel ..................................... 8-52
Installing a wheel....................................... 8-52
Troubleshooting ........................................ 8-53
Troubleshooting charts ............................. 8-54
CLEANING AND STORAGE ........................... 9-1 Cleaning ...................................................... 9-1 Storage ....................................................... 9-2
SPECIFICATIONS ........................................ 10-1
CONSUMER INFORMATION....................... 11-1 Identification numbers .............................. 11-1
INDEX .......................................................... 12-1
U2LS62E0.book Page 3 Thursday, February 25, 2016 8:44 AM
3-3
3
EBU17714Controls and instruments
TIPThe ATV you have purchased may differ slightly
from the figures shown in this manual.
1. Clutch lever
2. Parking brake lever
3. Main switch
4. Front brake fluid reservoir
5. Brake lever
6. Throttle lever
7. Reverse knob
8. Handlebar switches
12 3
4
5
67
8
U2LS62E0.book Page 3 Thursday, February 25, 2016 8:44 AM
4-6
43. Tighten the locknut.
EBU18383Clutch leverThe clutch lever is located on the left handlebar
and the ignition circuit cut-off system is incorpo-
rated in the clutch lever holder. To disengage the
clutch, pull the clutch lever toward the handlebar
grip. To engage the clutch, release the clutch le-
ver. The clutch lever should be pulled rapidly and
released slowly for smooth clutch operation. (See
page 6-1 for a description of the ignition circuit
cut-off system.)
EBU31001Brake leverYFM70RSBH
The brake lever is located on the right handlebar.
To apply the front brake, pull the brake lever to-
ward the handlebar grip.
1. Locknut
2. Adjusting screw
3. No more than 12 mm (0.47 in)
3 12
(a)
(b)
1. Clutch lever
U2LS62E0.book Page 6 Thursday, February 25, 2016 8:44 AM
4-9
4
WARNING
EWB00221Always set the parking brake before starting
the engine. The ATV could start moving un-
expectedly if the parking brake is not ap-
plied. This could cause loss of control or a
collision.
Always be sure you have released the park-
ing brake before you begin to ride. The brake
could overheat if you ride the ATV without re-
leasing the parking brake. You could lose
braking performance which could cause an
accident. You could also wear out the brakes
prematurely. EBU18541Shift pedalThis ATV is equipped with a constant-mesh 5-
speed forward and 1-speed reverse transmission.
The shift pedal is located on the left side of the en-
gine and is used in combination with the clutch
when shifting.
EBU18642Reverse knob “REV”The reverse knob is used to shift into reverse. See
the “Operating the reverse knob and driving in re-
verse” section on page 6-4 before operating this
ATV in reverse.1. Shift pedal
1
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5-2
5
Front brake• Check operation. If soft or spongy, have Yamaha dealer bleed hy-
draulic system.
• Check brake pads for wear, and replace if necessary.
• Check brake fluid level in reservoir, and add specified brake fluid to specified level if necessary.
• Check hydraulic system for leakage. Correct if necessary. 5-4, 8-29, 8-31, 8-33
Rear brake • Check operation. If soft or spongy, have Yamaha dealer bleed hy-
draulic system.
• Check brake pads for wear, and replace if necessary.
• Check brake fluid level in reservoir, and add specified brake fluid to specified level if necessary.
• Check hydraulic system for leakage. Correct if necessary. 5-4, 8-29, 8-31, 8-34
Clutch • Check operation, and correct if necessary.
• Lubricate cable if necessary.
• Check lever free play, and adjust if necessary. 8-36
Throttle lever • Make sure that operation is smooth. Lubricate cable and lever
housing if necessary.
• Check lever free play, and adjust if necessary. 5-5, 8-28
Control cables • Make sure that operation is smooth. Lubricate if necessary. 8-40
Drive chain • Check chain slack, and adjust if necessary.
• Check chain condition. Lubricate if necessary. 5-5, 8-38, 8-40
Wheels and tires • Check wheel condition, and replace if damaged.
• Check tire condition and tread depth. Replace if necessary.
• Check air pressure. Correct if necessary. 5-5
Shift pedal • Make sure that operation is smooth.
• Correct if necessary.
8-41
Brake pedal • Make sure that operation is smooth. Lubricate pedal pivoting point
if necessary. 8-41
ITEM ROUTINE PAGEU2LS62E0.book Page 2 Thursday, February 25, 2016 8:44 AM
5-3
5
Brake and clutch levers• Make sure that operation is smooth. Lubricate lever pivoting points
if necessary. 8-41
Chassis fasteners • Make sure that all nuts, bolts and screws are properly tightened. 5-7
Instruments, lights and
switches • Check operation, and correct if necessary. 5-8
ITEM ROUTINE PAGE
U2LS62E0.book Page 3 Thursday, February 25, 2016 8:44 AM