2000 YAMAHA YZ426F brake

5 - 22
CHAS

FRONT BRAKE AND REAR BRAKE
2. Install:
l
Brake lever
1

l
Bolt (brake lever)
2

l
Nut (brake lever)
3

NOTE:

Apply the lithium soap base grease on the bolt.
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)

3. Install:
l
Locknut
1

l
Circlip
2

NOTE:

l
Make sure the circlip is installed into the
groove
a
of the push rod.
l
After installing, check the brake lever posi-
tion. Refer to “FRONT BRAKE ADJUST-
MENT” section in the CHAPTER 3.
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
New
EC5A5400
Rear master cylinder
1. Install:
lReservoir hose 1
lReservoir tank 2
2. Install:
lMaster cylinder 1
lBolt (master cylinder) 2

5 - 23
CHASFRONT BRAKE AND REAR BRAKE
3. Install:
lSpring 1
lBrake pedal 2
lO-ring 3
lBolt (brake pedal) 4
lClip 5
NOTE:
lApply the lithium soap base grease on the
bolt, O-ring and brake pedal bracket.
lInstall the clip with its stopper portion a fac-
ing inward.
New
T R..19 Nm (1.9 m · kg, 13 ft · lb)
4. Install:
lPin 1
lPlain washer 2
lCotter pin 3
NOTE:
After installing, check the brake pedal height.
Refer to “REAR BRAKE ADJUSTMENT” sec-
tion in the CHAPTER 3.
New
EC5A5900
Front brake hose
1. Install:
lBrake hose 1
To brake hose holder 2.
NOTE:
Before tightening the bolt (brake hose holder),
pass the brake hose in front of the axle boss
a, then fit it into the hose groove b so that the
brake hose does not contact the nut (wheel
axle).
2. Install:
lHose cover 1
lPlain washer 2
lBolt [hose cover (M8)] 3
lBolt [hose cover (M6)] 4
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..16 Nm (1.6 m · kg, 11 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)

5 - 24
CHASFRONT BRAKE AND REAR BRAKE
3. Pass the brake hose through the cable
guide 1, then through the guide a on
the protector 2.
4. Install:
lCopper washer 1
lBrake hose 2
lUnion bolt 3
WARNING
Always use new copper washers.
ACHTUNG:CAUTION:
Install the brake hose so that its pipe por-
tion a directs as show and lightly touches
the projection b on the master cylinder.
New
T R..30 Nm (3.0 m · kg, 22 ft · lb)
EC5A5500
Rear brake hose
1. Install:
lCopper washer 1
lBrake hose 2
lCopper washer 3
lUnion bolt 4
WARNING
Always use new copper washers.
ACHTUNG:CAUTION:
When installing the brake hose, first align
the tooth a on the copper washer 1 with
the projection b on the master cylinder.
Then, align the pipe portion on the end of
the brake hose with the tooth c on the cop-
per washer 1 and tighten the union bolt.
New
New
T R..30 Nm (3.0 m · kg, 22 ft · lb)

5 - 25
CHASFRONT BRAKE AND REAR BRAKE
2. Install:
lBrake hose holder 1
lScrew (brake hose holder) 2
ACHTUNG:CAUTION:
After installing the brake hose holders,
make sure the brake hose does not contact
the spring (rear shock absorber). If it does,
correct its twist.
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
EC5A5600
Brake fluid
1. Fill:
lBrake fluid
Until the fluid level reaches “LOWER”
level line a.
WARNING
lUse only the designated quality brake
fluid:
otherwise, the rubber seals may deterio-
rate, causing leakage and poor brake per-
formance.
lRefill with the same type of brake fluid;
mixing fluids may result in a harmful chem-
ical reaction and lead to poor performance.
lBe careful that water does not enter the
master cylinder when refilling. Water will
significantly lower the boiling point of the
fluid and may result in vapor lock.
ACHTUNG:CAUTION:
Brake fluid may erode painted surfaces or
plastic parts. Always clean up spilled fluid
immediately.
Front
õRear
Recommended brake fluid:
DOT #4

õ

5 - 26
CHASFRONT BRAKE AND REAR BRAKE
2. Air bleed:
lBrake system
Refer to “BRAKE SYSTEM AIR
BLEEDING” section in the CHAPTER
3.
3. Inspect:
lBrake fluid level
Fluid at lower level ® Fill up.
Refer to “BRAKE FLUID LEVEL
INSPECTION” section in the CHAP-
TER 3.
4. Install:
[Front]
lDiaphragm
lMaster cylinder cap 1
lScrew (master cylinder cap) 2
[Rear]
lDiaphragm
lReservoir tank cap 1
lMaster cylinder guard
ACHTUNG:CAUTION:
After installation, while pulling the lever in
or pushing down on the pedal, check
whether there is any brake fluid leaking
where the union bolts are installed respec-
tively at the master cylinder and caliper.
Front
õRear
5. Install: (rear brake only)
lCaliper protector 1
lBolt (protector) 2

T R..2 Nm (0.2 m · kg, 1.4 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)õ
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)

5 - 27
CHASFRONT FORK
EC550000
FRONT FORK
Extent of removal:1 Front fork removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalFRONT FORK REMOVAL
Hold the machine by placing the
suitable stand under the engine.
Front wheel Refer to “FRONT WHEEL AND REAR
WHEEL” section.
Front caliper Refer to “FRONT BRAKE AND REAR
BRAKE” section.
Number plate
1 Protector 1
2 Brake hose holder 2
3 Pinch bolt (handle crown) 2 Only loosening.
4 Cap bolt 1Loosen when disassembling the front fork.
5 Pinch bolt (under bracket) 2 Only loosening.
6 Front fork 1
WARNING
Support the machine securely so there is nodanger of it falling over.
1

5 - 39
CHASFRONT FORK
4. Tighten:
lPinch bolt (handle crown) 1
lPinch bolt (under bracket) 2
ACHTUNG:CAUTION:
Tighten the under bracket to specified
torque. If torqued too much, it may cause
the front fork to malfunction.
5. Install:
lBrake hose holder 1
lCaliper 2
lBolt (caliper) 3
NOTE:
Fit the brake hose holder cut a over the pro-
jection b on the front fork and clamp the brake
hose.
6. Install:
lBrake hose holder 1
lBolt (brake hose holder) 2
lProtector 3
lBolt (protector) 4
NOTE:
When installing the brake hose holder, pass
the brake hose 5 in front of the axle boss a,
then fit it into the hose groove b so that the
brake hose does not contact the nut (wheel
axle).
T R..23 Nm (2.3 m · kg, 17 ft · lb)
T R..20 Nm (2.0 m · kg, 14 ft · lb)
T R..23 Nm (2.3 m · kg, 17 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
7. Adjust:
lRebound damping force
NOTE:
Turn in the damping adjuster 1 finger-tight
and then turn out to the originally set position.

5 - 41
CHAS

EC5B3000
REMOVAL POINTS
EC5B3100
Master cylinder
1. Remove:
l
Master cylinder bracket
1

l
Master cylinder
2

ACHTUNG:CAUTION:

l
Do not let the master cylinder hang on the
brake hose.
l
Keep the master cylinder cap side hori-
zontal to prevent air from coming in.
EC5B3200
Grip
1. Remove:
l
Grip
1

NOTE:

Blow in air between the handlebar or tube
guide and the grip. Then remove the grip
which has become loose.
EC5B4000
INSPECTION
EC5B4100
Handlebar
1. Inspect:
l
Handlebar
1

Bends/cracks/damage
®
Replace.
WARNING

Do not attempt to straighten a bent handle-
bar as this may dangerously weaken the
handlebar.
EC5B5000
ASSEMBLY AND INSTALLATION
1. Install:
l
Handlebar
1

l
Handlebar holder
2

l
Bolt (handlebar holder)
3

NOTE:

l
The upper handlebar holder should be
installed with the punched mark
a
forward.
l
First tighten the bolts on the front side of the
handlebar holder, and then tighten the bolts
on the rear side.
T R..23 Nm (2.3 m · kg, 17 ft · lb)

HANDLEBAR