Yamaha Wr250r 2008 Manual

 
1
2
3
4
5
6
7
8
9
 
PERIODIC CHECKS AND ADJUSTMENTS 
PERIODIC MAINTENANCE ...........................................................................3-1 
INTRODUCTION ......................................................................................3-1
Periodic maintenance chart for the emission control system ...................3-1 
ENGINE ..........................................................................................................3-4 
ADJUSTING THE VALVE CLEARANCE...

 
ELECTRICAL SYSTEM .................................................................................3-33 
CHECKING AND CHARGING THE BATTERY........................................3-33
CHECKING THE FUSES .........................................................................3-33
REPLACING THE HEADLIGHT BULB ....................................................3-33
ADJUSTING THE HEADLIGHT BEAM ....................................................3-33 

 
PERIODIC MAINTENANCE 
3-1 
EAS20450 
PERIODIC MAINTENANCE 
EAS20460 
INTRODUCTION 
This chapter includes all information necessary to perform recommended checks and adjustments. If
followed, these preventive maintenance procedures will ensure more reliable vehicle operation, a long-
er service life and reduce the need for costly overhaul work. This information applies to vehicles already
in service as well as to new vehicles that are being prepared for sale. All service technicians should be
familiar...

 
General maintenance and lubrication chart 
3-2 
EAS32164 
General maintenance and lubrication chart 
No. ITEM ROUTINEINITIAL ODOMETER READINGS
600 mi 
(1000 km) 
or 
1 month4000 mi 
(6000 km) 
or 
6 months7000 mi 
(11000 km) 
or 
12 months10000 mi 
(16000 km) 
or 
18 months13000 mi 
(21000 km) 
or 
24 months16000 mi 
(26000 km) 
or 
30 months  
1* 
Air filter element 
 
Clean with solvent. 
 
Replace if necessary. 
√√√√√  
2* 
Clutch 
 
Check operation. 
 
Adjust or replace cable. 
√√√√√√  
3*...

 
3-3 
* Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service.
NOTE:
 
From 19000 mi (31000 km) or 36 months, repeat the maintenance intervals starting from 7000 mi 
(11000 km) or 12 months.
NOTE:
 
 
The air filter needs more frequent service if you are riding in unusually wet or dusty areas. 
 
Hydraulic brake service 
 
After disassembling the brake master cylinders and calipers, always change the fluid. Regularly
check the brake fluid levels...

 
ENGINE 
3-4 
EAS20471 
ENGINE 
EAS20520 
ADJUSTING THE VALVE CLEARANCE 
The following procedure applies to all of the
valves.
NOTE:
 
 
Valve clearance adjustment should be made
on a cold engine, at room temperature. 
 
When the valve clearance is to be measured or
adjusted, the piston must be at top dead center 
(TDC) on the compression stroke.
1. Remove: 
 
Seat 
 
Side cover (left/right) 
 
Air scoop (left/right)
Refer to “GENERAL CHASSIS” on page 4-1. 
 
Fuel tank
Refer to “FUEL TANK” on page...

 
ENGINE 
3-5 
 
Before removing the cam chain and camshaft,
connect the cam chain using a wire so that it 
does not drop in the crankcase.
b. Remove the valve lifter “1” and the valve pad
“2” with a hand valve lapper.
NOTE:
 
 
Cover the timing chain opening with a rag to
prevent the valve pad from falling into the
crankcase. 
 
Make a note of the position of each valve lifter
“1” and valve pad “2” so that they can be in- 
stalled in the correct place.
c. Select the proper valve pad from the follow-...

 
ENGINE 
3-6
NOTE:
 
 
Refer to “CAMSHAFT” on page 5-6. 
 
Lubricate the camshaft bearings, camshaft
lobes and camshaft journals. 
 
First, install the exhaust camshaft. 
 
Align the camshaft sprocket marks with the
edge of the cylinder head. 
 
Turn the crankshaft counterclockwise several 
full turns to seat the parts.
f. Measure the valve clearance again.
g. If the valve clearance is still out of specifica-
tion, repeat all of the valve clearance adjust-
ment steps until the specified clearance...

 
ENGINE 
3-7 
2. Remove: 
 
Seat 
 
Side cover (left/right) 
 
Air scoop (left/right)
Refer to “GENERAL CHASSIS” on page 4-1. 
 
Fuel tank
Refer to “FUEL TANK” on page 7-1.
3. Adjust: 
 
Throttle cable free play
NOTE:
 
When the throttle is opened, the accelerator ca- 
ble is pulled.

 
Throttle body side 
a. Loosen the locknut “1” on the decelerator ca-
ble.
b. Turn the adjusting nut “2” in direction “a” or
“b” to take up any slack on the decelerator ca-
ble.
c....

 
ENGINE 
3-8 
 
Seat
Refer to “GENERAL CHASSIS” on page 4-1. 
EAS20690 
CHECKING THE SPARK PLUG 
1. Remove: 
 
Seat 
 
Side cover (left/right) 
 
Air scoop (left/right)
Refer to “GENERAL CHASSIS” on page 4-1. 
 
Fuel tank
Refer to “GENERAL CHASSIS” on page 4-1.
2. Remove: 
 
Ignition coil assembly “1” 
 
Spark plug
Refer to “CAMSHAFT” on page 5-6.
CAUTION:
 
 ECA13330 
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from...