2005 YAMAHA YZ250LC engine oil

2-1
GENERAL SPECIFICATIONSSPEC
Model name: YZ250T1 (USA, CDN)
YZ250 (EUROPE, ZA)
YZ250T (AUS, NZ)
Model code number: 1P81 (USA, CDN, ZA)
1P82 (EUROPE)
1P84 (AUS, NZ)
Dimensions:USA, ZAAUS, NZ EUROPE CDN
Overall length 2,179 mm←2,188 mm 2,186 mm
(85.8 in) (86.1 in) (86.1 in)
Overall width 827 mm←←←
(32.6 in)
Overall height 1,306 mm←1,310 mm 1,309 mm
(51.4 in) (51.6 in) (51.5 in)
Seat height 989 mm←992 mm←
(38.9 in) (39.1 in)
Wheelbase 1,481 mm←1,485 mm←
(58.3 in) (58.5 in)
Minimum ground clearance 383 mm←386 mm←
(15.1 in) (15.2 in)
Dry weight:
Without oil and fuel 96.0 kg (211.6 lb)
Engine:
Engine type Liquid cooled 2-stroke, gasoline
Cylinder arrangement Single cylinder, forward inclined
Displacement 249 cm
3(8.76 lmp oz, 8.42 US oz)
Bore ×Stroke 66.4 ×72 mm (2.614 ×2.835 in)
Compression ratio 9.1~10.9 : 1 (Expect for EUROPE)
9.0~10.6 : 1 (For EUROPE)
Starting system Kick starter
Lubrication system: Premix (30 : 1)(Yamalube 2-R)
Oil type or grade (2-Cycle):
Transmission oil Yamalube 4 (10W-30) or SAE 10W-30 type SE
motor oil
Periodic oil change 0.75 L (0.66 Imp qt, 0.79 US qt)
Total amount 0.80 L (0.70 Imp qt, 0.85 US qt)
Coolant capacity (including all routes): 1.20 L (1.06 Imp qt, 1.27 US qt)
Air filter: Wet type element
Fuel:
Type Premium unleaded gasoline
only with a research octane
number of 95 or higher
Tank capacity 8.0 L (1.76 Imp gal, 2.11 US gal)
EC200000
SPECIFICATIONSEC211000
GENERAL SPECIFICATIONS
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2-14
CABLE ROUTING DIAGRAMSPEC
EC240000
CABLE ROUTING DIAGRAM
1Radiator hose
2Throttle cable
3Clutch cable
4“ENGINE STOP” button lead
5Radiator breather hose
6C.D.I. magneto lead
7Ignition coil leadAPass the clutch cable on the out-
side of the throttle cable and
“ENGINE STOP” button lead.
BPass through the cable guide the
throttle cable, “ENGINE STOP”
button lead and clutch cable.
CAlign the throttle cable locating
tape with the cable guide.
DPass above the radiator hose the
throttle cable, “ENGINE STOP”
button lead and clutch cable.
EClamp the “ENGINE STOP” but-
ton lead to the frame.
FClamp to the frame the throttle
cable, clutch cable, TPS (throttle
position sensor) lead and sole-
noid valve lead.
GClamp to the frame the throttle
cable, TPS (throttle position sen-
sor) lead and solenoid valve
lead.HPass the clutch cable in front of
the center of the cylinder head
tightening nut.
IPass the air vent hose, overflow
hose and crankcase breather
hose between the frame and
connecting rod.
JLocate the clamp ends in the
arrowed range.
1P8-9-30-2 16/6/04 11:47 AM Page 54

2-15
CABLE ROUTING DIAGRAMSPEC
1Clamp
2Radiator hose
3Solenoid valve lead
4TPS (throttle position sensor)
lead
5Air vent hose (left)
6Crankcase breather hose
7Overflow hose
8Air vent hose (right)AInsert the tip of the fuel tank
breather hose into the hole in
the steering shaft cap.
BPass the radiator breather hose,
ignition coil lead and C.D.I.
magneto lead between the
frame and the left of the radia-
tor.
CClamp the C.D.I. magneto lead
and ignition coil lead to the
frame.
DInstall the side core and ignition
coil together to the frame.
EPass the radiator breather hose
from the outside of the engine
bracket to the inside of the
downtube. Pass the radiator
breather hose on the inside of
the C.D.I. magneto lead.
FClamp the C.D.I. magneto lead,
radiator breather hose and
Y.P.V.S. breather hose. GClamp to the frame the radiator
breather hose and C.D.I. mag-
neto lead.
HPass the C.D.I. magneto lead
and radiator breather hose in
front of the radiator hose.
IPass the throttle cable behind
the air vent hose.
JPass the air vent hose, overflow
hose and crankcase breather
hose so that they do not contact
the rear shock absorber.
KClamp the air vent hoses.
1P8-9-30-2 16/6/04 11:47 AM Page 56

2-16
CABLE ROUTING DIAGRAMSPEC
1Clamp
2High tension cord
3C.D.I.unit
4“ENGINE STOP” button lead
5Ignition coil lead
6Radiator hose
7Radiator breather hose
8Throttle cable
9Clutch cable
0WireharnessAClamp the wireharness to the
right engine bracket.
BPass the high tension cord to
the right of the radiator hose.
CPass the C.D.I. unit lead
between the frame and the right
side of the radiator and then
above the radiator fitting boss.
DPass the radiator breather hose
behind the radiator hose.
ELocate the clamp ends in the
arrowed range.
F
Insert the C.D.I. unit band until it
stops at the C.D.I. unit stay.
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3-4
PRE-OPERATION INSPECTION AND MAINTENANCE
INSP
ADJ
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good operating
condition.
Before using this machine, check the following points.
EC321000
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
Coolant Check that coolant is filled up to the radiator filler cap.
Check the cooling system for leakage.P3-5~9
Fuel Check that a fresh mixture of oil and gasoline is filled in
the fuel tank. Check the fuel line for leakage.P1-12
Transmission oil Check that the oil level is correct. Check the crankcase
for leakage.P3-12~14
Gear shifter and clutch Check that gears can be shifted correctly in order and
that the clutch operates smoothly.P3-9
Throttle grip/Housing Check that the throttle grip operation and free play
are correctly adjusted. Lubricate the throttle grip and P3-10~11
housing, if necessary.
Brakes Check the play of front brake and effect of front and
rear brake.P3-17~23
Chain Check chain slack and alignment. Check that the chain
is lubricated properly.P3-24~26
Wheels Check for excessive wear and tire pressure. Check for
loose spokes and have no excessive play.P3-34~35
Steering Check that the handlebar can be turned smoothly and
have no excessive play.P3-35~36
Front forks and Check that they operate smoothly and there is no oil
rear shock absorber leakage.P3-26~33
Cables (wires) Check that the clutch and throttle cables move smooth-
ly. Check that they are not caught when the handlebars —
are turned or when the front forks travel up and down.
Muffler Check that the muffler is tightly mounted and has no
cracks.P3-15~16
Sprocket Check that the driven sprocket tightening bolt is
not loose.P3-24
Lubrication Check for smooth operation. Lubricate if necessary. P3-37
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P1-16
Lead connectors Check that the CDI magneto, CDI unit, and ignition coil
are connected tightly.P1-6
Settings Is the machine set suitably for the condition of the
racing course and weather or by taking into account the
P7-1~24
results of test runs before racing? Are inspection and
maintenance completely done?
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INSP
ADJ
3-7
RADIATOR CAP INSPECTION
cC
9Do not mix more than one type of ethyl-
ene glycol antifreeze containing corro-
sion inhibitors for aluminum engine.
9Do not use water containing impurities
or oil.
7. Install:
9Radiator cap
Start the engine and warm it up for a sev-
eral minutes.
8. Check:
9Coolant level
Coolant level lowAdd coolant.
EC355000
RADIATOR CAP INSPECTION
1. Inspect:
9Seal (radiator cap) 1
9Valve and valve seat 2
Crack/DamageReplace.
Exist fur deposits 3Clean or replace.
Handling notes of coolant:
The coolant is harmful so it should be handled
with special care.
w
9When coolant splashes to your eye.
Thoroughly wash your eye with water
and see your doctor.
9When coolant splashes to your clothes.
Quickly wash it away with water and then
with soap.
9When coolant is swallowed.
Quickly make him vomit and take him to
a doctor.
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INSP
ADJ
3-12
TRANSMISSION OIL LEVEL CHECK
3. Inspect:
9Air filter element
DamageReplace.
4. Apply:
9Foam-air-filter oil or equivalent oil
To the element.
NOTE:
Squeeze out the excess oil. Element should be
wet but not dripping.
5. Install:
9Filter guide 1
NOTE:
Align the projection aon filter guide with the
hole bin air filter element.
6. Apply:
9Lithium soap base grease
On the matching surface aon air filter ele-
ment.
7. Install:
9Air filter element 1
9Washer
9Fitting bolt
NOTE:
Align the projection aon filter guide with the
hole bin air filter case.
EC35H002
TRANSMISSION OIL LEVEL CHECK
1. Start the engine, warm it up for several min-
utes and wait for five minutes.
2. Place the machine on a level place and hold
it up on upright position by placing the suit-
able stand under the engine.
2 Nm (0.2 m•kg, 1.4 ft•lb)
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INSP
ADJ
3-13
TRANSMISSION OIL REPLACEMENT
3. Check:
9Transmission oil level
EC35K002
TRANSMISSION OIL REPLACEMENT
1. Start the engine and warm it up for several
minutes and wait for five minute.
2. Place the machine on a level place and hold
it on upright position by placing the suitable
stand under the engine.
3. Place a suitable container under the engine.
Transmission oil level checking steps:
9Remove the oil check bolt 1.
9Inspect the oil level.
NOTE:
Be sure the machine is positioned straight
up when inspecting the oil level.
w
Never attempt to remove the oil check bolt
just after high speed operation. The heat-
ed oil could spout out, causing danger.
Wait until the oil cools down.
Oil flows outOil level is correct.
Oil does not flow outOil level is low.
Add transmission
oil until oil flows
out.
9Inspect the gasket (oil check bolt), replace if
damaged.
9Tighten the oil check bolt.
Recommended oil:
Yamalube 4 (10W-30) or SAE
10W-30 type SE motor oil
Oil check bolt:
10 Nm (1.0 m•kg, 7.2 ft•lb)
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