2001 YAMAHA WR 400F boot

IMPORTANT NOTICE
THIS MACHINE IS DESIGNED STRICTLY
FOR COMPETITION USE, ONLY ON A
CLOSED COURSE. It is illegal for this
machine to be operated on any public street,
road, or highway. Off-road use on public lands
may also be illegal. Please check local regula-
tions before riding.
1. THIS MACHINE IS TO BE OPERATED
BY AN EXPERIENCED RIDER ONLY.
Do not attempt to operate this
machine at maximum power until you
are totally familiar with its character-
istics.
2. THIS MACHINE IS DESIGNED TO BE
RIDDEN BY THE OPERATOR ONLY.
Do not carry passengers on this
machine.
3. ALWAYS WEAR PROTECTIVE
APPAREL.
When operating this machine, always
wear an approved helmet with gog-
gles or a face shield. Also wear heavy
boots, gloves, and protective cloth-
ing. Always wear proper fitting cloth-
ing that will not be caught in any of
the moving parts or controls of the
machine.
4. ALWAYS MAINTAIN YOUR MACHINE
IN PROPER WORKING ORDER.
For safety and reliability, the machine
must be properly maintained. Always
perform the pre-operation checks
indicated in this manual. Correcting a
mechanical problem before you ride
may prevent an accident.
SAFETY INFORMATION

2 - 40
SPECCABLE ROUTING DIAGRAM
1Coolant reservoir tank
breather hose
2Clamp
3Ignition coil
4High tension cord
5CDI unit
6CDI unit band
7Radiator (left)
8Radiator (right)
9Decompression cable
0CDI unit stay (frame)Fasten the coolant reservoir tank
breather hose and carburetor
breather hose together with a
plastic locking tie.
õFasten the ignition coil lead to the
frame with a plastic band.
‚Pass the ignition coil lead (in the
sub wire harness) so that it does
not contact the carburetor and
rear shock absorber and connect
it with the lead from the ignition
coil on the inside of the frame.
ëFasten the ignition coil and
ground lead to the frame with the
bolt.
äPass the throttle cables over the
high tension cord.ìPass the throttle cables along the
outer side of the CDI unit leads.
íUsing a plastic locking tie, clamp
to the frame the CDI unit leads at
their protecting tubes.
îFit the boot over the coupler.
éPass the throttle cables between
the top radiator mounting boss
and middle radiator mounting
boss.
ïPass the CDI unit leads over the
top radiator mounting boss.
ðCross the pull and return throttle
cables before the radiator.
ñPass the throttle cables through
the cable guide.
÷Insert the CDI unit band over the
CDI unit stay (frame) as far as
possible.

5 - 14
CHASFRONT BRAKE AND REAR BRAKE
EC5A8300
MASTER CYLINDER DISASSEMBLY
Front
õRear
Extent of removal:1 Front master cylinder disassembly2 Rear master cylinder disassembly
Extent of removal Order Part name Q’ty Remarks
MASTER CYLINDER DISAS-
SEMBLY
1 Master cylinder cap 1
2 Diaphragm 1
3 Master cylinder boot 1
4 Circlip 1 Use a long nose circlip pliers.
5 Plain washer 1
6 Push rod 1
7 Master cylinder kit
1
12
21

5 - 22
CHASFRONT BRAKE AND REAR BRAKE
4. Install:
[Front]
lMaster cylinder kit 1
lPlain washer 2
lCirclip 3
lMaster cylinder boot 4
To master cylinder 5.
[Rear]
lMaster cylinder kit 1
lPush rod 2
lCirclip 3
lMaster cylinder boot 4
To master cylinder 5.
NOTE:
lApply the brake fluid on the master cylinder
kit.
lApply the lithium soap base grease on the tip
of the push rod.
lWhen installing the circlip, use a long nose
circlip pliers.
Front
õRear

õ
EC5A5310
Front master cylinder
1. Install:
lMaster cylinder 1
lMaster cylinder bracket 2
lBolt (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
master cylinder bracket, and then tighten the
bolts on the lower side.
T R..9 Nm (0.9 m · kg, 6.5 ft · lb)