2001 YAMAHA WR 250F coolant

GEN
INFO

1 - 1
DESCRIPTION
EC100000
GENERAL INFORMATION
EC110000
DESCRIPTION
1
Clutch lever
2
Decompression lever
3
Trip meter
4
Light switch
5
Front brake lever
6
Throttle grip
7
Radiator cap
8
Fuel tank cap
9
Oil tank cap
0
Engine stop switch
A
Taillight
B
Kickstarter crank
C
Fuel tank
D
Headlight
E
Radiator
F
Coolant drain bolt
G
Rear brake pedal
H
Valve joint
I
Fuel cock
J
Cold starter knob
K
Hot starter knob (red)
L
Drive chain
M
Air filter
N
Shift pedal
O
Front fork
NOTE:

l
The machine you have purchased may differ
slightly from those shown in the following.
l
Designs and specifications are subject to
change without notice.
1

1 - 14
GEN
INFO
STARTING AND BREAK-IN
STARTING AND BREAK-IN
WARNING
Never start or run the engine in a closed
area. The exhaust fumes are poisonous;
they can cause loss of consciousness and
death in a very short time. Always operate
the machine in a well-ventilated area.
CAUTION:
lThe carburetor on this motorcycle has a
built-in accelerator pump. Therefore,
when starting the engine, do not operate
the throttle or the spark plug will foul.
lUnlike a two-stroke engine, this engine
cannot be kick started when the throttle is
open because the kick starter may kick
back. Also, if the throttle is open the air/
fuel mixture may be too lean for the
engine to start.
lNever use the decompression lever after
the engine is started. The engine may be
damaged if you use the decompression
lever while it is running.
lBefore starting the machine, perform the
checks in the pre-operation check list.
STARTING A COLD ENGINE
1. Inspect the coolant level.
2. Turn the fuel cock to “ON”.
3. Shift the transmission into neutral.
4. Fully open the cold starter knob.
5. Without pulling in the decompression
lever, slowly depress the kickstarter
crank until the compression stroke is
found. When considerable resistance of
the kickstarter crank is felt, the engine is
on the compression stroke. If the engine
is on the exhaust stroke, resistance will
only be felt when the kickstarter crank is
initially depressed, not through the entire
range of depression (as when the engine
is on the compression stroke); therefore,
depress the kickstarter crank a few more
times.

SPEC

2 - 2
GENERAL SPECIFICATIONS
Oil capacity:
Engine oil
Periodic oil change 1.5 L (1.32 Imp qt, 1.59 US qt)
With oil filter replacement 1.6 L (1.41 Imp qt, 1.69 US qt)
Total amount 1.7 L (1.50 Imp qt, 1.80 US qt)
Coolant capacity (including all routes): 1.3 L (1.14 Imp qt, 1.37 US qt)
Air filter: Wet type element
Fuel:
Type Premium unleaded fuel with a research octane
number of 95 or higher. (Except for AUS)
Unleaded fuel only (For AUS)
Tank capacity 12 L (2.64 Imp gal, 3.17 US gal)
(For USA, CDN)
8.0 L (1.76 Imp gal, 2.11 US gal)
(Except for USA, CDN)
Reserve 1.6 L (0.35 Imp gal, 0.42 US gal)
(For USA, CDN)
1.4 L (0.31 Imp gal, 0.37 US gal)
(Except for USA, CDN)
Carburetor:
Type FCR-MX37
Manufacturer KEIHIN
Spark plug:
Type/manufacturer CR8E/NGK
U24ESR-N/DENSO
Gap 0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
Clutch type: Wet, multiple-disc
Transmission:
Primary reduction system Gear
Primary reduction ratio 57/17 (3.353)
Secondary reduction system Chain drive
Secondary reduction ratio 52/13 (4.000)
Transmission type Constant mesh, 5-speed
Operation Left foot operation
Gear ratio: 1st 31/13 (2.385)
2nd 28/16 (1.750)
3rd 28/21 (1.333)
4th 25/24 (1.042)
5th 22/27 (0.815)
Chassis:
Frame type Semi double cradle
Caster angle 27.1˚
Trail 117.4 mm (4.62 in)

2

SPEC

2 - 10
MAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Spark plug M10S
´
1.0 1 13 1.3 9.4
Camshaft cap M6
´
1.0 10 10 1.0 7.2
Cylinder head blind plug screw M12
´
1.0 1 37 3.7 27
Cylinder head (stud bolt) M6
´
1.0 2 7 0.7 5.1
(stud bolt) M8
´
1.25 1 15 1.5 11
(bolt) M9
´
1.25 4 38 3.8 27
(nut) M6
´
1.0 2 10 1.0 7.2
Cylinder head cover M6
´
1.0 2 10 1.0 7.2
Oil pressure check bolt M6
´
1.0 1 10 1.0 7.2
Cylinder M6
´
1.0 1 10 1.0 7.2
Balancer weight M6
´
1.0 2 10 1.0 7.2
Balancer shaft driven gear M14
´
1.0 1 50 5.0 36
Timing chain guide (intake side) M6
´
1.0 2 10 1.0 7.2
Decompression shaft M6
´
1.0 1 7 0.7 5.1
Decompression cable guide M6
´
1.0 1 10 1.0 7.2
Timing chain tensioner M6
´
1.0 2 10 1.0 7.2
Timing chain tensioner cap bolt M6
´
1.0 1 7 0.7 5.1
Impeller M8
´
1.25 1 14 1.4 10
Radiator hose clamp M6
´
1.0 8 2 0.2 1.4
Coolant drain bolt M6
´
1.0 1 10 1.0 7.2
Water pump housing M6
´
1.0 4 10 1.0 7.2
Radiator M6
´
1.0 6 10 1.0 7.2
Radiator guard M6
´
1.0 2 10 1.0 7.2
Radiator pipe M6
´
1.0 1 10 1.0 7.2
Oil pump cover M4
´
0.7 1 3 0.3 2.2
Oil pump M6
´
1.0 3 10 1.0 7.2
Oil filter element drain bolt M6
´
1.0 1 10 1.0 7.2
Oil filter element cover M6
´
1.0 2 10 1.0 7.2
Oil strainer M6
´
1.0 2 10 1.0 7.2
Oil delivery pipe 1 (M10) M10 ´ 1.25 1 20 2.0 14
(M8) M8 ´ 1.25 2 18 1.8 13
Oil delivery pipe 2 M6 ´ 1.0 1 10 1.0 7.2
Oil hose M6 ´ 1.0 3 10 1.0 7.2
Oil hose clamp — 2 2 0.2 1.4
Oil strainer and frame M18 ´ 1.5 1 90 9.0 65
Carburetor joint clamp M4 ´ 0.7 2 3 0.3 2.2
Air filter joint clamp M6 ´ 1.0 1 3 0.3 2.2
Throttle cable cover M5 ´ 0.8 1 4 0.4 2.9
Air filter joint M5 ´ 0.8 2 5 0.5 3.6
Air filter joint and air filter case M5 ´ 0.8 5 1 0.1 0.7
Air filter element M6 ´ 1.0 1 2 0.2 1.4
Air filter case cover M6 ´ 1.0 4 4 0.4 2.9
Exhaust pipe (nut) M8 ´ 1.25 1 13 1.3 9.4
(bolt) M8 ´ 1.25 1 24 2.4 17
Exhaust pipe protector M6 ´ 1.0 3 10 1.0 7.2

SPEC
2 - 16
MAINTENANCE SPECIFICATIONS
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race. Headlight stay (lower) and lower bracket M6 ´ 1.0 2 7 0.7 5.1
Headlight (left and right) M6 ´ 1.0 2 10 1.0 7.2
Headlight (lower) M6 ´ 1.0 1 7 0.7 5.1
Taillight M6 ´ 1.0 3 4 0.4 2.9
Taillight lead clamp and rear fender M4 ´ 1.59 2 1 0.1 0.7
Coolant reservoir M6 ´ 1.0 2 7 0.7 5.1
Sidestand bracket and frame M10 ´ 1.25 2 64 6.4 46
Sidestand M10 ´ 1.25 1 64 6.4 46 Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb

2 - 19
SPEC

CABLE ROUTING DIAGRAM
EC240000
CABLE ROUTING DIAGRAM
1
Hose guide
2
Brake hose
3
Voltage regulator
4
Light switch lead
5
Fuel tank breather hose
6
Clamp
7
Oil tank breather hose
8
Engine stop switch lead
9
Sub-wire harness
0
Taillight lead
A
Throttle position sensor lead
B
Neutral switch lead
C
Oil hose
D
Cylinder head breather hose
E
CDI magneto lead
F
Clutch cable
G
Cable guide
H
Carburetor breather hose
I
Carburetor overflow hose
J
Coolant reservoir breather hose
K
Decompression cable
L
CDI unit lead
M
Ignition coil lead
N
Voltage regulator lead

Pass the fuel tank breather hose
behind handlebar, then insert it
into the steering stem hole.
õ
Pass the decompression cable,
engine stop switch lead and light
switch lead under where the oil
hose is attached.
‚
Pass the voltage regulator lead,
engine stop switch lead and light
switch lead over the radiator
hose.
ë
Fasten the engine stop switch
lead and ignition coil lead of the
sub-wire harness.
ä
Fasten the sub-wire harness
and engine stop switch lead.
ì
Pass the cylinder head breather
hose along the right side of the
oil tank breather hose.
í
Fasten the sub-wire harness
and engine stop switch lead in
front of the upper engine brack-
ets.
î
Fasten the sub-wire harness.
é
Pass the sub-wire harness
between the upper engine
brackets.
ï
Fasten the sub-wire harness.
ð
Fasten the throttle position sen-
sor lead.

2 - 21
SPEC

1
Coolant reservoir breather hose
2
Radiator breather hose
3
Ignition coil
4
CDI unit
5CDI unit band
6Throttle cable (return)
7Throttle cable (pull)
8Cable guide
9CDI unit lead
0Spark plug lead
ACDI unit stayFasten the coolant reservoir breather hose and
carburetor breather hose together.
õPass the throttle cables along inner side of the
spark plug lead.
‚Pass the CDI unit lead between the radiator hose
and radiator mounting boss.
ëPass the throttle cables through the cable guide.
äInsert the CDI unit band over the CDI unit stay
(frame) as far as possible.
CABLE ROUTING DIAGRAM

2 - 22
SPEC
1Coolant reservoir hose
2Coolant reservoir breather hose
3Clamp
4Taillight lead
5Hose guideFasten the coolant reservoir hose and coolant
reservoir breather hose.
õDo not allow the taillight lead to slacken.
‚Pass the coolant reservoir hose and coolant res-
ervoir breather hose through the hose guide.
CABLE ROUTING DIAGRAM