2004 YAMAHA BIG BEAR PRO 400 brake pads

5-7
Brake fluid leakage (front brake)
Check to see if any brake fluid is leaking out of the
hose, joint or brake fluid reservoir of the front
brake. Apply the brake firmly for one minute. If the
lever moves slowly inward, there may be a leak in
the brake system. If there is any leakage, the
brake system should be inspected by a Yamaha
dealer.
Brake operation
Test the brakes at slow speed after starting out to
make sure they are working properly. If the brakes
do not provide proper braking performance, in-
spect the brake pads and shoes for wear. (See
pages 8-55–8-57.)
WARNING
_ Always check the brakes at the start of every
ride. Do not ride the ATV if you find any prob-
lem with the brakes or you could lose braking
ability, which could lead to an accident. If a
problem cannot be corrected by the adjust-
ment procedures provided in this manual,
have a Yamaha dealer check for the cause. _
U4SH6B.book Page 7 Tuesday, May 27, 2003 4:39 PM

8-55 1. Adjusting bolt 2. Locknut
a. Throttle lever free play
1. Boulon de réglage 2. Contre-écrou
a. Jeu du levier d’accélération
1. Perno de ajuste 2. Contratuerca
a. Juego libre de la palanca del acelerador
1. Brake pad a. Wear limit
1. Plaquette de frein a. Limite d’usure
1. Pastillas del freno a. Límite de desgaste
EBU00307
Throttle lever adjustmentNOTE:Adjust the engine idling speed before adjusting the
throttle lever free play.1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle lever
free play is 3.0–5.0 mm.
3. Tighten the locknut.
EBU13770
Front brake pad check
Check the brake pads for damage and wear. If a
brake pad thickness is less than 1 mm, have a
Yamaha dealer replace the pads as a set.NOTE:_ The wheels need to be removed to check the
brake pads. (See page 8-79 for removal and in-
stallation procedures.) _
U4SH6B.book Page 55 Tuesday, May 27, 2003 4:39 PM

8-57 1. Wear indicator 2. Wear limit
1. Indicateur d’usure 2. Limite d’usure
1. Indicador de desgaste 2. Límite de desgaste
1. Minimum level mark
1. Repère de niveau minimum
1. Marca de nivel mínimo
EBU00313
Rear brake shoe inspection
A wear indicator is provided on the rear brake.
This indicator allows checking of brake shoe wear
without disassembling the brake.
Apply the rear brake and check the position of the
indicator. If the indicator reaches the wear limit
line, ask a Yamaha dealer to replace shoes as a
set.
EBU13040
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.
U4SH6B.book Page 57 Tuesday, May 27, 2003 4:39 PM