2003 YAMAHA YFM350R brake

8-8 * It is recommended that these items be serviced by a Yamaha dealer.
** Lithium-soap-based grease
NOTE:

Recommended brake fluid: DOT 4


Brake fluid replacement:
1. When disassembling the master cylinders or calipers, replace the brake fluid. Normally check the
brake fluid level and add fluid as required.
2. On the inner parts of the master cylinders and calipers, replace the oil seals every two years.
3. Replace the brake hoses every four years, or if cracked or damaged.
Wheel bearings*•Check bearing assemblies for looseness/damage.
•Replace if damaged.Steering system*•Check operation.
•Repair if damaged.
•Check toe-in.
•Adjust if necessary.Front and rear
suspension*•Check operation.
•Correct if necessary.Upper and lower arm
pivot and steering shaft*•Lubricate every 6 months.**Rear arm pivot*
•Lubricate every 6 months.**Fittings and fasteners*•Check all chassis fittings and fasteners.
•Correct if necessary.Battery*•Check specific gravity.
•Check breather hose for proper routing.
•Correct if necessary.Lights and switches*•Check operation.
•Adjust headlight beam.
ITEM ROUTINEINITIAL EVERY
1
month3
months6
months6
months1
year
U5NF62.book Page 8 Wednesday, May 8, 2002 1:40 PM

8-41 1. Wear indicator groove
1. Rainure d’indication d’usure
1. Ranura indicadora de desgaste
Front
Avant
Delantero1. Wear indicator groove
1. Rainure d’indication d’usure
1. Ranura indicadora de desgasteRear
Arrière
Trasero
EBU01027
Front and rear brake pad inspection
Each brake pad is provided with a wear indicator
groove. The indicators allow checking of brake
pad wear without disassembling the brake. Apply
the brake and inspect the wear indicator grooves.
If the pad is worn to the point that the wear indica-
tor grooves are almost in contact with the disc
plate, ask a Yamaha dealer to replace the pads.
U5NF62.book Page 41 Wednesday, May 8, 2002 1:40 PM

8-43 1. Minimum level mark
1. Repère de niveau minimum
1. Marca de nivel mínimo
Front
Avant
Delantero1. Minimum level mark
1. Repère de niveau minimum
1. Marca de nivel mínimoRear
Arrière
Trasero
EBU01185
Brake fluid level check
Insufficient brake fluid may let air enter the brake
system, possibly causing the brakes to become in-
effective.
Before riding, check that the brake fluid is above
the minimum level mark and replenish if neces-
sary. A low brake fluid level may indicate worn
brake pads and/or brake system leakage. If the
brake fluid level is low, be sure to check the brake
pads for wear and the brake system for leakage.
Observe these precautions:

When checking the fluid level, make sure the
top of the brake fluid reservoir is level by turn-
ing the handlebars.


Use only the designated quality brake fluid.
Otherwise, the rubber seals may deteriorate,
causing leakage and poor brake performance.
Recommended brake fluid: DOT 4
U5NF62.book Page 43 Wednesday, May 8, 2002 1:40 PM

8-45

Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reaction
and lead to poor brake performance.


Be careful that water does not enter the brake
fluid reservoir when refilling. Water will signifi-
cantly lower the boiling point of the fluid and
may result in vapor lock.


Brake fluid may deteriorate painted surfaces or
plastic parts. Always clean up spilled fluid im-
mediately.


Have a Yamaha dealer check the cause if the
brake fluid level goes down.
U5NF62.book Page 45 Wednesday, May 8, 2002 1:40 PM

8-47
EBU01186
Brake fluid replacement
Complete fluid replacement should be done only
by trained Yamaha service personnel. Have a
Yamaha dealer replace the following components
during periodic maintenance or when they are
damaged or leaking.

Replace the oil seals every two years.


Replace the brake hoses every four years.
U5NF62.book Page 47 Wednesday, May 8, 2002 1:40 PM

8-49 a. Brake lever free play
a. Jeu du levier de frein
a. Juego libre de la palanca de freno
EBU01188
Front brake lever free play
The front brake lever should have a free play of
zero mm at the lever end. If not, have a Yamaha
dealer check the brake system.
WARNING
_ Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability
which could lead to an accident.
After servicing:

Make sure the brakes operate smoothly
and that the free play is correct.


Make sure the brakes do not drag.


Make sure the brakes are not spongy. All
air must be bled from the brake system.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
_
U5NF62.book Page 49 Wednesday, May 8, 2002 1:40 PM

8-51 a. Brake pedal position
a. Position de la pédale de frein
a. Posición del pedal de freno
EBU01079
Brake pedal height adjustment
The top of the brake pedal should be positioned
10 mm below the top of the footrest. If not, have a
Yamaha dealer adjust it.
WARNING
_ Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability,
which could lead to an accident. After servic-
ing:

Make sure the brakes operate smoothly
and that the brake pedal position is cor-
rect.


Make sure the brakes do not drag.


Make sure the brakes are not spongy. All
air must be bled from the brake system.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
_
U5NF62.book Page 51 Wednesday, May 8, 2002 1:40 PM

8-53 A. Cable length
A. Longueur de câble
A. Longitud del cable
EBU01192
Parking brake adjustment
Parking brake adjustment may be required if the
parking brake does not hold properly. The cable
length
A should be adjusted to 46–50 mm.
1. Fully loosen the locknut and the adjusting bolt
at the clutch lever.
2. Loosen the locknut and the adjusting bolt at
the rear brake caliper.
3. Turn the adjusting bolt at the clutch lever in
direction
a to increase the cable length or in
direction
b to decrease the cable length.NOTE:_ If the cable cannot be adjusted to specification,
consult a Yamaha dealer. _
U5NF62.book Page 53 Wednesday, May 8, 2002 1:40 PM