2003 YAMAHA BEAR TRACKER 250 air filter

OPERATION ...........................................6-1
Starting a cold engine ...........................6-3
Starting a warm engine ........................6-9
Warming up ..........................................6-9
Drive select lever operation and
reverse driving .................................6-11
Shifting ...............................................6-15
To start out and accelerate: ................6-17
To decelerate: ....................................6-19
Engine break-in ..................................6-21
Parking ...............................................6-23
Parking on a slope .............................6-25
Accessories and loading ....................6-27
RIDING YOUR ATV..................................7-1
Getting to know your ATV .....................7-3
Ride with care and good
judgement ...........................................7-5
Be careful where you ride ...................7-27
Turning your ATV ................................7-41
Climbing uphill.....................................7-47
Riding downhill ....................................7-57
Crossing a slope .................................7-61
Crossing through shallow water ..........7-65
Riding over rough terrain ....................7-69
Sliding and skidding ............................7-71
67
What to do if ....................................... 7-75
What to do .......................................... 7-75
PERIODIC MAINTENANCE AND
ADJUSTMENT ......................................... 8-1
Owner’s manual and tool kit ................. 8-3
Periodic maintenance/lubrication ......... 8-7
Engine oil ............................................ 8-13
Final gear oil ....................................... 8-21
Spark plug inspection ......................... 8-27
Air filter cleaning ................................. 8-31
Carburetor adjustment ....................... 8-37
Idle speed adjustment ....................... 8-39
Valve clearance adjustment .............. 8-41
Throttle lever adjustment ................... 8-41
Front brake pad inspection ................ 8-43
Rear brake shoe inspection ............... 8-43
Brake fluid level inspection ................ 8-45
Brake fluid replacement ...................... 8-47
Front brake adjustment ...................... 8-49
Rear brake adjustment ....................... 8-51
Adjusting the rear brake light switch ... 8-57
Clutch adjustment .............................. 8-59
Cable inspection and lubrication......... 8-61
Brake lever and brake pedal
lubrication ........................................ 8-63
Steering shaft lubrication ................... 8-63
8
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7-67
1. Check hose
1. Flexible de contrôle
1. Manguito de retención
Test your brakes after leaving the water. Do not
continue to ride your ATV without verifying that
you have regained proper braking ability.CAUTION:
After riding your ATV in water, be sure to drain
the trapped water by removing the check hose
at the bottom of the air filter case. Wash the
ATV in fresh water if it has been operated in
salt water or muddy conditions.
U4XE64.book Page 67 Thursday, May 30, 2002 1:49 PM

8-7
EBU00262
PERIODIC MAINTENANCE/LUBRICATION
ITEM ROUTINEINITIAL EVERY
1
month3
months6
months6
months1
year
Valves*•Check valve clearance.
•Adjust if necessary.
Spark plug•Check condition.
•Adjust gap and clean.
•Replace if necessary.Air filter•Clean.
•Replace if necessary.Every 20–40 hours
(More often in wet or dusty areas.)
Carburetor*•Check idle speed/starter operation.
•Adjust if necessary.Cylinder head breather
system*•Check breather hose for cracks or damage.
•Replace if necessary.Exhaust system*•Check for leakage.
•Retighten if necessary.
•Replace gasket if necessary.Fuel line*•Check fuel hose for cracks or damage.
•Replace if necessary.Engine oil
•Replace (Warm engine before draining).Engine oil filter
•Clean.Engine oil strainer
•Clean.Final gear oil•Check oil level/oil leakage.
•Replace.Front brake*•Check operation/fluid leakage/see NOTE page 8-8.
•Correct if necessary.Rear brake*•Check operation.
•Adjust if necessary.Clutch*•Check operation.
•Adjust if necessary.U4XE64.book Page 7 Thursday, May 30, 2002 1:49 PM

8-31 1. Check hose
1. Flexible de contrôle
1. Manguito de comprobación
1. Air filter case cover
1. Couvercle du boîtier de filtre à air
1. Tapa de la caja del filtro de aire
EBU01086
Air filter cleaningNOTE:There is a check hose at the bottom of the air filter
case. If dust or water collects in this hose, empty
the hose and clean the air filter element and air fil-
ter case. 1. Remove the seat. (Refer to page 4-27 for
seat removal and installation procedures.)
2. Remove the air filter case cover.
U4XE64.book Page 31 Thursday, May 30, 2002 1:49 PM

8-33
1. Air filter element 2. Foam cover
1.Élément du filtre à air 2. Cache en mousse
1. Elemento del filtro de aire 2. Forro de espuma
3. Pull out the air filter element.
4. Separate the foam cover from the air filter el-
ement.
5. Tap the air filter element lightly to remove
most of the dust and dirt. Blow out the re-
maining dirt with compressed air. If the air fil-
ter element is damaged, replace it.
6. Wash the foam cover gently but thoroughly in
water or solvent.
WARNING
When using solvent to clean the foam cover,
always use parts cleaning solvent. Never use
low flash point solvents or gasoline to clean
the foam cover because the engine could
catch fire or explode. 7. Squeeze the excess solvent out of the foam
cover and let it dry.CAUTION:

Do not twist the foam cover when squeez-
ing it.


Do not apply oil to the foam cover.
8. Inspect the foam cover. If damaged, replace
it.
U4XE64.book Page 33 Thursday, May 30, 2002 1:49 PM

8-35
9. Install the foam cover onto the air filter ele-
ment.
10. Install the air filter assembly and parts re-
moved for access.NOTE:The air filter element should be cleaned every 20–
40 hours. It should be cleaned more often if the
machine is operated in extremely dusty areas.
Each time filter element maintenance is per-
formed, check the air inlet to the filter case for ob-
structions. Check the air cleaner rubber joint to the
carburetor and manifold fittings for an airtight seal.
Tighten all fittings securely to avoid the possibility
of unfiltered air entering the engine. CAUTION:
Never operate the engine with the air filter ele-
ment removed. This will allow unfiltered air to
enter, causing rapid engine wear and possible
engine damage. Additionally, operation with-
out the filter element will affect carburetor jet-
ting with subsequent poor performance and
possible engine overheating.
U4XE64.book Page 35 Thursday, May 30, 2002 1:49 PM

10-2
10
Engine:
Type Air-cooled 4-stroke, SOHC
Cylinder arrangement Single cylinder, forward-inclined
Displacement 229.6 cm
3
Bore
× stroke 71
× 58 mm
Compression ratio 8.7:1
Starting system Electric starter and recoil starter
Lubrication system Wet sump
Engine oil:
Type
Quantity:
Periodic oil change (engine oil)
Periodic oil change
(engine oil with oil filter replacement)
Total amountSee page 5-13
1.5 L
1.6 L
1.8 L
Final gear oil:
Type SAE 80 API “GL-4” Hypoid Gear Oil
Quantity
Total amount 0.27 LModel YFM250X
E-10-E.fm Page 2 Monday, June 3, 2002 11:25 AM

10-3
Air filter: Dry type element
Fuel:
Type For Europe: Regular unleaded gasoline only
For Australia: Unleaded gasoline only
Tank capacity 12 L
Reserve amount 1.6 L
Carburetor:
Type / manufacturer BST34/1/MIKUNI
Spark plug:
Type / manufacturer DR7EA / NGK
Gap 0.6–0.7 mm
Clutch type: Wet, centrifugal automatic
Transmission:
Primary reduction system Spur gear
Primary reduction ratio 73/22 (3.318)
Secondary reduction system Shaft drive
Secondary reduction ratio 19/18
× 46/11 (4.414)
Transmission type Constant mesh, 5-speed forward, 1-speed reverse
Operation Left foot operationModel YFM250X
U4XE64.book Page 3 Thursday, May 30, 2002 1:49 PM