lock YAMAHA GRIZZLY 250 2010 User Guide

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8 3. Check the engine idling speed and, if neces-
sary, adjust it to specification by turning the
throttle stop screw at the carburetor. To in-
crease the engine idling speed, turn the throt-
tle stop screw in direction (a), and to decrease
it, turn the screw in direction (b).
TIPIf the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.EBU24045Adjusting the throttle cable free play The throttle cable free play should be checked
and, if necessary, adjusted at the intervals speci-
fied in the periodic maintenance and lubrication
chart.
The throttle cable free play should measure 3.0–
5.0 mm (0.12–0.20 in) at the throttle lever. Period-
ically check the throttle cable free play and, if nec-
essary, adjust it as follows.TIPThe engine idling speed must be checked, and ad-
justed if necessary, before adjusting the throttle ca-
ble free play.1. Slide the rubber cover back.
2. Loosen the locknut.
3. To increase the throttle cable free play, turn
the throttle cable free play adjusting bolt in di-
rection (a). To decrease the throttle cable free
play, turn the adjusting bolt in direction (b).
1. Throttle stop screwEngine idling speed:
1400–1500 r/min
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8
4. Tighten the locknut.
5. Slide the rubber cover to its original position.
EBU24060Valve clearance The valve clearance changes with use, resulting in
improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance and lu-
brication chart.
EBU24071Adjusting the drive select lever safety
system cable The drive select lever safety system cable stretch-
es with use, which can result in improper function.
Therefore, the safety system cable should be
checked and adjusted by a Yamaha dealer at the
intervals specified in the periodic maintenance and
lubrication chart.EBU29601Brakes Replacement of brake components requires pro-
fessional knowledge. Brake service should be per-
formed by a Yamaha dealer.
WARNING
EWB02571Operating with improperly serviced or adjust-
ed brakes could lead to a loss in braking ability
and an accident.EBU24120Checking the front brake pads and rear
brake shoes The front brake pads and the rear brake shoes
must be checked for wear at the intervals specified
in the periodic maintenance and lubrication chart.
1. Rubber cover
2. Locknut
3. Throttle cable free play adjusting bolt
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8
EBU29840Checking the brake fluid level Insufficient brake fluid may allow air to enter the
brake system, possibly causing it to become inef-
fective.
Before riding, check that the brake fluid is above
the minimum level mark and replenish if neces-
sary. A low brake fluid level may indicate worn
brake pads and/or brake system leakage. If the
brake fluid level is low, be sure to check the brake
pads for wear and the brake system for leakage.
Observe these precautions:
When checking the fluid level, make sure that
the top of the brake fluid reservoir is level.

Use only the recommended quality brake fluid,
otherwise the rubber seals may deteriorate,
causing leakage and poor braking performance.
Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reaction
and lead to poor braking performance.
Be careful that water does not enter the brake
fluid reservoir when refilling. Water will signifi-
cantly lower the boiling point of the fluid and may
result in vapor lock.
Brake fluid may deteriorate painted surfaces or
plastic parts. Always clean up spilled fluid imme-
diately.
As the brake pads wear, it is normal for the brake
fluid level to gradually go down. However, if the
brake fluid level goes down suddenly, have a
Yamaha dealer check the cause.EBU24281Changing the brake fluid Have a Yamaha dealer change the brake fluid at
the intervals specified in the TIP after the periodic
maintenance and lubrication chart. In addition,
1. Minimum level mark
Recommended brake fluid:
DOT 4
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8a. Remove the footboard. (See “Engine oil”
on page 8-11 for removal and installation
procedures.)
b. Loosen the locknuts at the brake pedal.
c. Turn the brake pedal position adjusting
bolt at the brake pedal in direction (a) to
raise the brake pedal, and in direction (b)
to lower it.
d. Tighten the locknuts at the brake pedal.
2.Adjusting the brake pedal free playThe brake pedal free play should measure
20.0–30.0 mm (0.79–1.18 in) as shown. If the
free play is incorrect, adjust it as follows.
a. Fully loosen the brake lever free play ad-
justing nut on the brake cable at the rear
wheel hub.
b. Turn the brake pedal free play adjusting
nut on the brake rod at the rear wheel hub
in direction (a) to increase the free play,
and in direction (b) to decrease it.
1. Locknut
2. Brake pedal position adjusting bolt
3. Brake pedal position
1. Brake pedal free play
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8 3.Adjusting the brake lever free play
The brake lever free play should measure
5.0–7.0 mm (0.20–0.28 in) as shown. If the
free play is incorrect, adjust it as follows.a. Loosen the locknut at the brake lever and
fully turn in the brake lever free play adjust-
ing bolt.
b. Turn the brake lever free play adjusting nut
on the brake cable at the rear wheel hub so
that the distance between the brake cam-
shaft lever and the pin, gap “A”, measures
0–1 mm (0–0.04 in).
1. Brake lever free play adjusting nut
2. Brake pedal free play adjusting nut
1. Brake lever free play
2. Locknut
3. Brake lever free play adjusting bolt
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8
c. Turn the brake lever free play adjusting
bolt at the brake lever in direction (a) to in-
crease the free play, and in direction (b) to
decrease it.d. Tighten the locknut at the brake lever.
e. Install the footboard.
TIPWhen adjusting the rear brake lever free play:
Be sure not to step on the brake pedal.
Make sure the brake pedal does not move.EBU24762Brake light switches The brake light, which is activated by the brake
pedal and brake levers, should come on just be-
fore braking takes effect.
1. Brake lever free play adjusting nut
2. Brake camshaft lever
3. Pin
4. Gap “A”
2 31 4
1. Locknut
2. Brake lever free play adjusting bolt
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8 The brake light switch for the brake pedal can be
adjusted as follows, but the other brake light
switches should be adjusted by a Yamaha dealer.
1. Remove the footboard. (See “Engine oil” on
page 8-11 for removal and installation proce-
dures.)
2. Turn the adjusting nut while holding the brake
light switch in place. To make the brake light
come on earlier, turn the adjusting nut in direc-
tion (a). To make the brake light come on lat-
er, turn the adjusting nut in direction (b).
3. Install the footboard.
EBU24803Adjusting the clutch free play The clutch free play must be adjusted periodically.
Adjust the free play as follows.
1. Remove the footboard. (See “Engine oil” on
page 8-11 for removal and installation proce-
dures.)
2. Loosen the locknut.
3. Slowly turn the clutch adjusting screw in direc-
tion (a) until resistance is felt, and then turn it
1/8 turn in direction (b).
1. Brake light switch
2. Rear brake light switch adjusting nut
1. Locknut
2. Clutch adjusting screw
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8
TIPTurning the clutch adjusting screw in direction (a)
decreases clutch free play and turning it in direc-
tion (b) increases clutch free play.4. Tighten the locknut to the specified torque.TIPWhen tightening the locknut, hold the clutch ad-
justing screw with a screwdriver so that it does not
turn together with the locknut.5. Install the footboard.EBU24901Checking and lubricating the cables The operation and the condition of all control ca-
bles should be checked before each ride, and the
cables and cable ends should be lubricated if nec-
essary. If a cable is damaged or does not move
smoothly, have a Yamaha dealer check or replace
it.
WARNING
EWB02581
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the cable
sheaths become damaged, and cables can
also become frayed or kinked, which could
restrict the operation of controls and lead to
an accident or injury.
Always make sure all control cables work
smoothly before you begin riding in cold
weather. If the control cables are frozen or do
not work smoothly, you could be unable to
control the ATV, which could lead to an acci-
dent or collision.EBU28711Checking and lubricating the front and
rear brake levers The operation of the front and rear brake levers
should be checked before each ride, and the lever
pivots should be lubricated if necessary. Tightening torque:
Locknut:
15 Nm (1.5 m·kgf, 11 ft·lbf)Recommended lubricant:
Engine oil
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82. Remove the headlight bulb holder cover by
pulling it off.3. Remove the headlight bulb holder by pushing
it in and turning it counterclockwise.
4. Remove the burnt-out bulb by pulling it out.
5. Insert a new headlight bulb into the bulb hold-
er by pushing it in. NOTICE: Do not touch
the glass part of the headlight bulb to keep
it free from oil, otherwise the transparency
of the glass, the luminosity of the bulb, and
the bulb life will be adversely affected.
Thoroughly clean off any dirt and finger-
prints on the headlight bulb using a cloth
moistened with alcohol or thinner.
[ECB00651]
1. Cover at the rear of the headlight
1. Headlight bulb holder cover
1. Headlight bulb holder
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8 6. Install the bulb holder by pushing it in and turn-
ing it clockwise.
7. Install the bulb holder cover and the cover at
the rear of the headlight. NOTICE: Make sure
the headlight bulb holder cover is securely
fitted over the bulb holder and seated
properly.
[ECB00671]
8. Adjust the headlight beam if necessary.
EBU25551Adjusting a headlight beam NOTICEECB00690It is advisable to have a Yamaha dealer make
this adjustment.To raise a headlight beam, turn the headlight beam
adjusting screw in direction (a).
To lower a headlight beam, turn the adjusting
screw in direction (b).
1. Do not touch the glass part of the bulb.
1. Headlight beam adjusting screw
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