Yamaha YFM660 01 User Manual

3 - 35
CHK
ADJADJUSTING THE PARKING BRAKE/
CHECKING THE BRAKE FLUID LEVEL
WARNING
After this adjustment is performed, lift the
rear wheels off the ground by placing a
block under the engine, and spin the rear
wheels to ensure there is no brake drag. If
any brake drag is noticed perform the
above steps again.
***********************************************
CHECKING THE BRAKE FLUID LEVEL
1.Place the machine on a level surface.
NOTE:
When inspecting the brake fluid level, make
sure that the top of the brake...

3 - 36
CHK
ADJCHECKING THE FRONT BRAKE PAD/
CHECKING THE REAR BRAKE PAD/
ADJUSTING THE REAR BRAKE LIGHT SWITCH
CHECKING THE FRONT BRAKE PAD
1.Remove:

Front wheels
2.Check:

Brake pad
Wear indicators 1
 almost in contact with the
brake disc →
 Replace the brake pads as a
set.
Refer to “FRONT AND REAR BRAKES” in
CHAPTER 4.
3.Operate the brake lever.
4.Install:

Front wheels
Brake pad wear limit a:
1 mm (0.04 in)
CHECKING THE REAR BRAKE PAD
1.Check:

Brake pad
Wear indicators 1
 almost in contact with the...

3 - 37
CHK
ADJADJUSTING THE REAR BRAKE LIGHT SWITCH/
CHECKING THE BRAKE HOSE
1.Check:

Rear brake light operation timing 
Incorrect →
 Adjust.
2.Adjust:

Rear brake light operation timing
***********************************************

Hold the main body 1
 of the rear brake light
switch so that it does not rotate and turn the
adjusting nut 2
 in direction a
 or b
 until the
rear brake light comes on at the proper time.
***********************************************
Direction a Brake light comes on...

3 - 38
CHK
ADJCHECKING THE BRAKE HOSE/
BLEEDING THE HYDRAULIC BRAKE SYSTEM
6.Install:

Front fender

Seat
Refer to “SEAT, FENDERS AND FUEL
TANK”.
BLEEDING THE HYDRAULIC BRAKE 
SYSTEM
WARNING
Bleed the brake system if:

The system has been disassembled.

A brake hose or brake pipe have been
loosened or removed.

The brake fluid has been very low.

The brake operation has been faulty.
A loss of braking performance may occur if
the brake system is not properly bled.
1.Bleed:

Brake system...

3 - 39
CHK
ADJ
j. Tighten the bleed screw.
NOTE:
If bleeding is difficult, it may be necessary to
let the brake fluid settle for a few hours.
Repeat the bleeding procedure when the tiny
bubbles in the system have disappeared.
k. Add brake fluid to the proper level.
Refer to “CHECKING THE BRAKE FLUID
LEVEL”.
WARNING
Check the operation of the brake after
bleeding the brake system.
***********************************************
T R..
Bleed screw:
6 Nm (0.6 m  kg, 4.3 ft  lb)
ADJUSTING THE SHIFT PEDAL...

3 - 40
CHK
ADJADJUSTING THE REVERSE CONTROL CABLE/
ADJUSTING THE DRIVE CHAIN SLACK
ADJUSTING THE REVERSE CONTROL 
CABLE
1.Check:

Reverse knob free play a
 
Out of specification →
 Adjust.
Reverse knob free play:
0 mm (0 in)
2.Adjust:
***********************************************
Adjustment steps:

Pull the boots 1
 and 2
 off.

Loosen the locknut 3
.

Turn the adjusting nut 4
 until the reverse
control cable 5
 is taut or the length a
 is
135 mm (5.31 in).
NOTE:
Be sure to hold the reverse shift lever...

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CHK
ADJ
ADJUSTING THE DRIVE CHAIN SLACK
3.Measure:

Drive chain slack a
 
Out of specification →
 Adjust.
Drive chain slack:
30 ~ 45 mm (1.18 ~ 1.77 in)
4.Adjust:

Drive chain slack
***********************************************
Adjustment steps:

Loosen the hub nuts 1
.

Loosen the locknuts 2
.

Turn both adjusting bolts 3
 in direction a
 or
b
 until the specified drive chain slack is
obtained.
NOTE:
To maintain the proper axle alignment, adjust
both sides evenly. (There are marks c
 on
each...

3 - 42
CHK
ADJCHECKING THE STEERING SYSTEM/
ADJUSTING THE TOE-IN
CHECKING THE STEERING SYSTEM
1.Place the machine on a level surface.
2.Check:

Steering assembly bushings
Move the handlebar up and down, and/or
back and forth.
Excessive play →
 Replace the steering stem
bushings.
3.Check:

Tie-rod ends
Turn the handlebar to the left and/or right
until it stops completely, then move the han-
dlebar from the left to the right slightly. Tie-
rod end has any vertical play →
 Replace the
tie-rod end(s)....

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CHK
ADJ
***********************************************
Toe-in measurement steps:
NOTE:
Before measuring the toe-in, make sure that
the tire pressure is correct.

Mark both front tire tread centers.

Raise the front end of the machine so that
there is no weight on the front tires.

Face the handlebar straight ahead.

Measure the width È
 between the marks.

Rotate the front tires 180° until the marks are
exactly opposite one another.

Measure the width É
 between the marks.

Calculate the toe-in...

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CHK
ADJ
***********************************************
Adjustment steps:

Mark both tie-rods ends.
This reference point will be needed during
adjustment.

Loosen the locknuts (tie-rod end) 1
 of both
tie-rods.

The same number of turns should be given
to both the right and left tie-rods 2
 until the
specified toe-in is obtained. This is to keep
the length of the rods the same.

Tighten the rod end locknuts of both tie rods.
NOTE:
Adjust the rod ends so that A and B are equal....