Page 141 of 180

8-45
8
Insufficient brake fluid may allow air to enter
the brake system, reducing braking perfor-
mance.
Clean the filler cap before removing. Use
only DOT 4 brake fluid from a sealed contain-
er.
Use only the specified brake fluid; otherwise,
the rubber seals may deteriorate, causing
leakage.
Refill with the same type of brake fluid. Add-
ing a brake fluid other than DOT 4 may result
in a harmful chemical reaction.
Be careful that water does not enter the
brake fluid reservoir when refilling. Water will
significantly lower the boiling point of the flu-
id and may result in vapor lock.
NOTICEECB01161Brake fluid may damage painted surfaces or
plastic parts. Always clean up spilled fluid im-
mediately. As the brake pads wear, it is normal for the brake
fluid level to gradually go down. A low brake fluid
level may indicate worn brake pads and/or brake
system leakage; therefore, be sure to check the brake pads for wear and the brake system for
leakage. If the brake fluid level goes down sud-
denly, have a Yamaha dealer check the cause be-
fore further riding.
EBU24283Changing the brake fluidHave a Yamaha dealer change the brake fluid at
the intervals specified in the periodic maintenance
and lubrication chart. In addition, have the oil seals
of the brake master cylinder and calipers as well
as the brake hoses replaced at the intervals listed
below or whenever they are damaged or leaking.
Oil seals: Replace every two years.
Brake hoses: Replace every four years.EBU24395Checking the front brake lever free
playThe brake lever free play must be checked at the
intervals specified in the periodic maintenance
and lubrication chart. The brake lever should have
no free play as shown. If there is free play, have a
Yamaha dealer check the brake system.
UB1660E0.book Page 45 Thursday, February 26, 2015 4:01 PM
Page 142 of 180
8-46
8
EBU34242Adjusting the rear brake lever and
brake pedal free playThe rear brake lever and brake pedal free play
must be checked and, if necessary, adjusted at
the intervals specified in the periodic maintenance
and lubrication chart.
Adjusting the brake lever free play
The brake lever free play should measure 6.0–7.0
mm (0.24–0.28 in). If the free play is incorrect, ad-
just it as follows.1. Loosen the locknut at the brake lever.1. No brake lever free play
1. Brake lever free play
1. Locknut
2. Brake lever free play adjusting bolt
1
(a)
(b)
12
UB1660E0.book Page 46 Thursday, February 26, 2015 4:01 PM
Page 143 of 180

8-47
8
2. To increase the brake lever free play, turn the
brake lever free play adjusting bolt in direction
(a). To decrease the brake lever free play, turn
the adjusting bolt in direction (b).
TIPIf the specified brake lever free play could be ob-
tained as described above, skip steps 3–8. 3. Fully turn the adjusting bolt in direction (a) toloosen the brake cable.
4. Slide the rubber cover back.
5. Loosen the brake cable adjuster locknut. 6. To increase the brake lever free play, turn the
brake lever free play adjusting nut in direction
(a). To decrease the brake lever free play, turn
the adjusting nut in direction (b).
7. Tighten the brake cable adjuster locknut.
8. Slide the rubber cover to its original position.
9. Tighten the locknut at the brake lever.
Adjusting the brake pedal free play
The brake pedal free play should measure 12.0–
17.0 mm (0.47–0.67 in). If the free play is incorrect,
adjust it as follows.
1. Remove panel G.
2. Loosen the locknut.1. Brake cable adjuster locknut
2. Brake lever free play adjusting nut
3. Rubber cover
2
3
1
(a)(b)
1. Brake pedal free play
1
UB1660E0.book Page 47 Thursday, February 26, 2015 4:01 PM
Page 144 of 180
8-48
83. To increase the brake pedal free play, turn the
brake pedal free play adjusting nut in direc-
tion (a). To decrease the brake pedal free
play, turn the adjusting nut in direction (b).
4. Tighten the locknut.
5. Install the panel.
EBU24231Axle bootsThe axle boots must be checked for damage at
the intervals specified in the periodic maintenance
and lubrication chart. Check the axle boots for
tears or damage. If any damage is found, have
them replaced by a Yamaha dealer.
1. Brake pedal free play adjusting nut
2. Locknut
2
(a)
(b)
1
1. Front axle boot (each side)
1
1
UB1660E0.book Page 48 Thursday, February 26, 2015 4:01 PM
Page 156 of 180
8-60
83. Remove the headlight bulb holder by pushing
it in and turning it counterclockwise. 4. Remove the burnt-out bulb by pulling it out.
5. Place a new headlight bulb into position.
NOTICE: Do not touch the glass part of the
headlight bulb to keep it free from oil, oth-
erwise the transparency of the glass, the
luminosity of the bulb, and the bulb life will
be adversely affected. Thoroughly clean
off any dirt and fingerprints on the head-
light bulb using a cloth moistened with al-
cohol or thinner.
[ECB00652]
6. Install the bulb holder by pushing it in and turning it clockwise.
1. Headlight bulb holder cover
1. Headlight bulb holder
1
1
1. Do not touch the glass part of the bulb.
UB1660E0.book Page 60 Thursday, February 26, 2015 4:01 PM
Page 157 of 180
8-61
8
7. Install the bulb holder cover and the cover at
the rear of the headlight. NOTICE: Make
sure the headlight bulb holder cover is se-
curely fitted over the bulb holder and seat-
ed properly.
[ECB00672]
8. Adjust the headlight beam if necessary.
Center headlight bulb (YFM70KPXG /
YFM70KPHG / YFM70KPSG) 1. Remove the headlight cover by removing the quick fasteners.
2. Remove the headlight bulb holder cover by pulling it off. 3. Remove the headlight bulb holder by pushing
it in and turning it counterclockwise.1. Headlight cover
2. Quick fastener
1
2
2
1. Headlight bulb holder cover
1. Headlight bulb holder
1
1
UB1660E0.book Page 61 Thursday, February 26, 2015 4:01 PM
Page 158 of 180

8-62
84. Remove the burnt-out bulb by pulling it out.
5. Place a new headlight bulb into position.
NOTICE: Do not touch the glass part of the
headlight bulb to keep it free from oil, oth-
erwise the transparency of the glass, the
luminosity of the bulb, and the bulb life will
be adversely affected. Thoroughly clean
off any dirt and fingerprints on the head-
light bulb using a cloth moistened with al-
cohol or thinner.
[ECB00652]
6. Install the bulb holder by pushing it in and turning it clockwise. 7. Install the bulb holder cover.
NOTICE: Make
sure the headlight bulb holder cover is se-
curely fitted over the bulb holder and seat-
ed properly.
[ECB00672]
8. Install the headlight cover as shown, and then install the quick fasteners.
9. Adjust the headlight beam if necessary.EBU25553Adjusting a headlight beamNOTICEECB00691It is advisable to have a Yamaha dealer make
this adjustment.
1. Do not touch the glass part of the bulb.
1. Headlight cover
1
UB1660E0.book Page 62 Thursday, February 26, 2015 4:01 PM
Page 159 of 180
8-63
8
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).
YFM70KPXG / YFM70KPHG / YFM70KPSG
EBU25614Replacing the tail/brake light bulbIf the tail/brake light bulb burns out, replace it as
follows.
1. Remove the tail/brake light bulb holder (to- gether with the bulb) by turning it counter-
clockwise.
1. Headlight beam adjusting screw
(b)
(a)
1
1. Headlight beam adjusting screw
(b)
(a)
1
UB1660E0.book Page 63 Thursday, February 26, 2015 4:01 PM