2004 YAMAHA WOLVERINE 450 brake

7-71
SLIDING AND SKIDDING
Care should be used when riding on loose or slip-
pery surfaces since the ATV may slide. If unex-
pected and uncorrected, sliding could lead to an
accident.
To reduce the tendency for the front wheels to
slide in loose or slippery conditions, positioning
your weight over the front wheels will sometimes
help.
If the rear wheels of your ATV start to slide side-
ways, control can usually be regained (if there is
room to do so) by steering in the direction of the
slide. Applying the brakes or accelerating is not
recommended until you have corrected the slide.
U5ND61.book Page 71 Thursday, June 5, 2003 7:02 PM

7-75
WHAT TO DO IF ...
This section is designed to be a reference guide
only. Be sure to read each section on riding tech-
niques completely.
WHAT TO DO ...

If your ATV doesn’t turn when you want it to:
Bring the ATV to a stop and practice the turning
maneuvers again. Be sure you are putting your
weight on the footboard to the outside of the
turn. Position your weight over the front wheels
for better control. (See pages 7-39–7-43.)


If your ATV begins to tip while turning:
Lean more into the turn to regain balance. If
necessary, gradually let off the throttle and/or
steer to the outside of the turn. (See pages
7-39–7-43.)


If your ATV starts to slide sideways:
Steer in the direction of the slide if you have the
room. Applying the brakes or accelerating is
not recommended until you have corrected the
slide. (See pages 7-71–7-73.)
U5ND61.book Page 75 Thursday, June 5, 2003 7:02 PM

7-77

If your ATV can’t make it up a hill you are trying
to climb:
Turn the ATV around if you still have forward
speed. If not, stop, dismount on the uphill side
of the ATV and physically turn the ATV around.
If the ATV starts to slip backwards DO NOT
USE THE REAR BRAKE - the ATV may tip
over on top of you. Dismount the ATV on the
uphill side. (See pages 7-45–7-53.)


If your ATV is traversing a sloping surface:
Be sure to ride with your weight positioned to-
wards the uphill side of the ATV to maintain
proper balance. If the ATV starts to tip, steer
down the hill (if there are no obstacles in your
way) to regain balance. If you discover that the
ATV is going to tip over, dismount on the uphill
side. (See pages 7-59–7-61.)
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7-79

If your ATV encounters shallow water:
Ride slowly and carefully through slow moving
water, watching for obstacles. Be sure to let
water drain from the ATV and CHECK YOUR
BRAKES FOR PROPER OPERATION when
you come out of the water. Do not continue to
ride your ATV until you have regained ade-
quate braking ability. (See pages 7-63–7-67.)
U5ND61.book Page 79 Thursday, June 5, 2003 7:02 PM

8-7
EBU00262
PERIODIC MAINTENANCE/LUBRICATION
ITEM ROUTINEWhichever
comes firstINITIAL EVERY
km 320 1,200 2,400 2,400 4,800
hours 20 75 150 150 300
Valves*Check valve clearance.
Adjust if necessary.
Cooling systemCheck coolant leakage.
Repair if necessary.
Replace coolant every 24 months.Spark plugCheck condition.
Adjust gap and clean.
Replace if necessary.Air filter elementClean.
Replace if necessary.Every 20–40 hours
(More often in wet or dusty areas.)
Carburetor*Check and adjust idle speed/starter operation.
Adjust if necessary.Crankcase breather
system*Check breather hose for cracks or damage.
Replace if necessary.Exhaust system*Check for leakage.
Retighten if necessary.
Replace gasket(s) if necessary.Fuel line*Check fuel hose for cracks or damage.
Replace if necessary.Engine oil
Replace. (Warm engine before draining.)Engine oil filter cartridge
Replace.Engine oil strainer*
Clean.Final gear oil
Check oil level/oil leakage.
Replace every 12 month.Differential gear oil
Front brake*Check operation/fluid leakage. (See NOTE page 8-8.)
Correct if necessary.Rear brake*Check operation/fluid leakage.(See NOTE page 8-8.)
Correct if necessary.U5ND61.book Page 7 Thursday, June 5, 2003 7:02 PM

8-8
* Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service.NOTE:

Recommended brake fluid: DOT 4


Brake fluid replacement:
When disassembling the master cylinders or caliper cylinders, replace the brake fluid. Normally
check the brake fluid level and add fluid as required.
On the inner parts of the master cylinders and caliper cylinders, replace the oil seals every two years.
Replace the brake hoses every four years, or if cracked or damaged.
V-belt*Check operation.
Check for cracks or damage.Wheels*Check balance/damage/runout.
Repair if necessary.Wheel bearing*Check bearing assemblies for looseness/damage.
Replace if damaged.Front and rear
suspension*Check operation.
Correct if necessary.Steering system*Check operation./Replace if damaged.
Check toe-in./Adjust if necessary.Drive shaft universal
joint*Lubricate with lithium-soap-based grease.Engine mount*
Check for cracks or damage.Axle boots*Check operation.
Replace if damaged.Fittings and fasteners*Check all chassis fittings and fasteners.
Correct if necessary.Lights and switches*Check operation.
Adjust headlight beams.
ITEM ROUTINEWhichever
comes firstINITIAL EVERY
km 320 1,200 2,400 2,400 4,800
hours 20 75 150 150 300
U5ND61.book Page 8 Thursday, June 5, 2003 7:02 PM

8-89 a. Brake pad thickness
a.Épaisseur de plaquette de frein
a. Espesor de la pastilla del freno
EBU13770
Front brake pad check
Check the brake pads for damage and wear. If a
brake pad thickness is less than 1.0 mm, have a
Yamaha dealer replace the pads as a set.NOTE:_ The wheels need to be removed to check the
brake pads. (See pages 8-111–8-113 for removal
and installation procedures.) _
U5ND61.book Page 89 Thursday, June 5, 2003 7:02 PM

8-91 1. Brake pad wear indicator groove
1. Rainure d’indication d’usure de plaquette de frein
1. Ranura del indicador de desgaste de la pastilla del freno
EBU06212
Rear brake pad check
Check the brake pads for damage or wear. Wear
indicator grooves are provided on the brake pads.
These indicators allow checking of brake pad wear
without disassembling the brake. Check the wear
indicator grooves. If a brake pad has worn to the
point that the wear indicator grooves have almost
disappeared, ask a Yamaha dealer to replace the
pads as a set.NOTE:_ The wheels need to be removed to check the
brake pads. (See pages 8-111–8-113 for wheel re-
moval and installation procedures.) _
U5ND61.book Page 91 Thursday, June 5, 2003 7:02 PM