brake YAMAHA YZ85 2002 Service Manual

5 - 18
CHAS
2. Install:
lPin boot 1
On brake caliper 2.
NOTE:
Apply the lithium soap base grease on the pin
boot inner surface.
5PA50500
3. Install:
lBrake caliper bracket 1
lBolt (brake caliper bracket) 2
lBrake pad 3
5PA50510
T R..30 Nm (3.0 m · kg, 22 ft · lb)
4. Install:
lBrake caliper 1
NOTE:
lApply the lithium soap base grease on the
guide pin 2.
lInstall the brake caliper into the guide pin
and turn it clockwise.
5PA50520
5. Install:
lBrake caliper support bolt 1
NOTE:
Apply the lithium soap base grease on the
brake caliper support bolt.
Rear brake caliper
1. Install:
lPad support 1
lBrake pad 2
lPad pin 3
NOTE:
lInstall the brake pad fitted with brake pad
shim 4 on the brake caliper piston side.
lTemporarily tighten the pad pins at this point.
5PA50530
T R..23 Nm (2.3 m · kg, 17 ft · lb)
5PA50540
FRONT BRAKE AND REAR BRAKE

5 - 19
CHAS
2. Install:
lBrake caliper 1
lBolt (brake caliper front side) 2
lBolt (brake caliper rear side) 3
lPlate
lProtector 4
lBolt (protector) 5
3. Tighten
lPad pin 6
Brake master cylinder kit
1. Clean:
lBrake master cylinder
lBrake master cylinder kit
Clean them with brake fluid.
5PA50550
T R..23 Nm (2.3 m · kg, 17 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..18 Nm (1.8 m · kg, 13 ft · lb)
2. Install:
lBrake master cylinder cup (primary) 1
lBrake master cylinder cup (secondary) 2
To brake master cylinder piston 3.
NOTE:
Apply the brake fluid on the brake master cylin-
der cup.
WARNING
After installing, cylinder cup should be
installed as shown direction. Wrong instal-
lation cause improper brake performance.
ÈFront
ÉRear
ÈÉ
5PA50560
ÈÉ
5PA50570
3. Install:
lSpring 1
To brake master cylinder piston 2.
NOTE:
Install the spring at the smaller dia. side.
ÈFront
ÉRear
ÈÉ
5PA50580
FRONT BRAKE AND REAR BRAKE

5 - 20
CHAS
4. Install:
[Front]
lBrake master cylinder kit 1
lWasher 2
lCirclip 3
lBrake master cylinder boot 4
To brake master cylinder 5.
[Rear]
lBrake master cylinder kit 1
lPush rod 2
lCirclip 3
lBrake master cylinder boot 4
To brake master cylinder 5.
NOTE:
lApply the brake fluid on the brake master cyl-
inder kit.
lApply the lithium soap base grease on the tip
of the push rod.
lWhen installing the circlip, use a long nose
circlip pliers.
ÈFront
ÉRear
È
5PA50590
É
5PA50600
Front brake master cylinder
1. Install:
lBrake master cylinder 1
lBrake master cylinder bracket 2
lBolt (brake master cylinder bracket) 3
NOTE:
lInstall the bracket so that the arrow mark
a
face upward.
lFirst tighten the bolts on the upper side of the
brake master cylinder bracket, and then
tighten the bolts on the lower side.
T R..9 Nm (0.9 m · kg, 6.5 ft · lb)
5PA50610
FRONT BRAKE AND REAR BRAKE

5 - 21
CHAS
2. Install:
lBrake lever 1
lBolt (brake lever) 2
lNut (brake lever) 3
NOTE:
Apply the lithium soap base grease on the
brake lever sliding surface, bolt and contacting
surface of the brake master cylinder piston.
Rear brake master cylinder
1. Install:
lReservoir hose 1
lReservoir tank 2
5PA50620
T R..6 Nm (0.6 m · kg, 4.3 ft · lb)
T R..6 Nm (0.6 m · kg, 4.3 ft · lb)
5PA50630
2. Install:
lBrake master cylinder 1
lBolt (brake master cylinder) 2
5PA50640
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
3. Install:
lBrake pedal 1
lSpring 2
lO-ring 3
lWasher 4
lCotter pin 5
NOTE:
Apply the lithium soap base grease on the
brake pedal shaft and O-rings.5PA50650
4. Install:
lPin 1
lWasher 2
lCotter pin 3
NOTE:
After installing, check the brake pedal height.
Refer to “REAR BRAKE ADJUSTMENT” sec-
tion in the CHAPTER 3.
5PA50655
FRONT BRAKE AND REAR BRAKE

5 - 22
CHAS
Front brake hose
1. Install:
lCopper washer 1
lBrake hose 2
lUnion bolt 3
WARNING
Always use new copper washers.
CAUTION:
Install the brake hose so that its pipe por-
tion a directs as show and lightly touches
the projection b on the brake master cylin-
der.
5PA50660
T R..30 Nm (3.0 m · kg, 22 ft · lb)
5PA50670
2. Install:
lProtector 1
lBolt (protector) 2
NOTE:
Fit the brake hose into the guides a of the pro-
tector.
5PA50680
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
3. Install:
lBrake hose holder 1
lBolt (brake hose holder) 2
NOTE:
lAlign the brake hose holder with the projec-
tion a on the front fork and clamp the brake
hose.
lPass the brake hose behind the rib b on the
front fork.
5PA50690
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
FRONT BRAKE AND REAR BRAKE

5 - 23
CHAS
4. Install:
lCopper washer 1
lBrake hose 2
lUnion bolt 3
WARNING
Always use new copper washers.
CAUTION:
Install the brake hose so that its pipe por-
tion a lightly touches the projection b on
the brake caliper.
5PA50700
5PA50710
T R..26 Nm (2.6 m · kg, 19 ft · lb)
Rear brake hose
1. Install:
lCopper washer 1
lBrake hose 2
lUnion bolt 3
WARNING
Always use new copper washers.
CAUTION:
Install the brake hose so that its pipe por-
tion a directs as show and lightly touches
the projection b on the brake master cylin-
der.
5PA50720
5PA50730
T R..26 Nm (2.6 m · kg, 19 ft · lb)
FRONT BRAKE AND REAR BRAKE

5 - 24
CHAS
2. Install:
lCopper washer 1
lBrake hose 2
lUnion bolt 3
WARNING
Always use new copper washers.
CAUTION:
Install the brake hose so that its pipe por-
tion a lightly touches the projection b on
the brake caliper.
5PA50740
5PA50750
T R..26 Nm (2.6 m · kg, 19 ft · lb)
3. Install:
lBrake hose holder 1
lScrew (brake hose holder) 2
5PA50760
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
FRONT BRAKE AND REAR BRAKE

5 - 25
CHAS
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
chemical reaction and lead to poor perfor-
mance.
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.
CAUTION:
Brake fluid may erode painted surfaces or
plastic parts. Always clean up spilled fluid
immediately.
ÈFront
ÉRear
2. Air bleed:
lBrake system
Refer to “BRAKE SYSTEM AIR BLEED-
ING” section in the CHAPTER 3.
Recommended brake fluid:
DOT #4
È
5PA50770
É
5PA50780
3. Inspect:
lBrake fluid level
Fluid at lower level ® Fill up.
Refer to “BRAKE FLUID LEVEL INSPEC-
TION” section in the CHAPTER 3.
FRONT BRAKE AND REAR BRAKE

5 - 26
CHAS
4. Install:
[Front]
lDiaphragm
lBrake master cylinder cap 1
lScrew (brake master cylinder cap) 2
[Rear]
lDiaphragm
lReservoir tank cap 1
lBolt (reservoir tank) 2
CAUTION:
After installation, while pulling the brake
lever in or pushing down on the brake
pedal, check whether there is any brake
fluid leaking where the union bolts are
installed respectively at the brake master
cylinder and brake caliper.
ÈFront
ÉRear
È
5PA50800
T R..2 Nm (0.2 m · kg, 1.4 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)É
5PA50810
FRONT BRAKE AND REAR BRAKE

5 - 27
CHASFRONT FORK
EC550000
FRONT FORK
5PA50820
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.
WARNING
Support the machine securely so there is nodanger of it falling over.
Front wheel Refer to “FRONT WHEEL AND REAR
WHEEL” section.
Front brake caliper Refer to “FRONT BRAKE AND REAR
BRAKE” section.
Number plate
Handlebar Refer to “HANDLEBAR” section.
1 Protector 1
2 Brake hose holder 1
3 Pinch bolt (upper bracket) 1 Only loosening.
4 Cap bolt 1 Loosen when disassembling the front fork.
5 Pinch bolt (lower bracket) 2 Only loosening.
6 Front fork 1
1