MAINTENANCE AFTER BREAK-IN
1-34
EAM20124
MAINTENANCE AFTER BREAK-IN
After a break-in, perform careful maintenance to
get ready for the next practice or race.
Refer to “PRE-OPERATION INSPECTION AND
MAINTENANCE” on page 3-6.
EAM30199
MAJOR MAINTENANCE
1. For the engine
•
Leaks around the engine
Check for pressure leaks from the cylinder
head or the cylinder, oil leaks from the crank-
case or the case cover, leaks from the cool-
ant system, and other leaks.
•
Check that the valve, the cylinder head, the
cylinder, the piston, and the piston ring fit one
another, and that contact between the valve
and the cylinder head, and that between the
cylinder and the piston are correct.
•
Engine oil change
Drain the oil, and check for dirt and foreign
materials such as metal chips. (If any foreign
material is mixed, disassemble and check the
crankcase.)
Pour the specified amount of the recom-
mended oil.
•
Generator
Check for looseness in mounted areas of the
generator rotor and the stator coil assembly.
Check that the connector is not being discon-
nected.
•
Silencer
Check the main body and stay for cracks.
Check for leaks.
•
Mounting bolts and nuts
Check for looseness in mounted areas of
parts, as well as engine mounting bolts and
engine brackets.
2. For the chassis
•
Check welds and mounted areas of the
frame, the swingarm, the link, the bracket,
and so on, for looseness and cracks.
•
Wheel(s)
Check the wheel for runout. Check the spoke
for looseness.
•
Brake(s)
Check the brake disc mounting bolt for loose-
ness.
Check that the reservoir contains the speci-
fied amount of brake fluid. Check for leaks.
•
Cable
Grease and adjust cables.
•
Drive chain
Lubricate the drive chain and adjust its ten-
sion.
•
Fuel tank
Clean the inside of the fuel tank. Check for
leaks.
•
Suspension
Check for oil leaks in the front fork or the rear
shock absorber. Check that the mounted
conditions are good.
•
Sprocket
Check for looseness in the sprocket mounted
on the rear wheel.
•
Mounting bolts and nuts
Check mounted areas for looseness.
NOTICE
ECA25831
After a break-in or before each race, always
check the points shown in “TORQUE-
CHECK POINTS” for tightening torques and
retighten them.
•
Greasing and oiling
Always grease or oil the specified points.
EAM30195
AIR FILTER MAINTENANCE
Apply the Yamaha foam air filter oil or other qual-
ity foam air filter oil to the element. (Excess oil in
the element may adversely affect engine start-
ing.) Refer to “CLEANING THE AIR FILTER EL-
EMENT” on page 3-16.
Summary of Contents for WR250FM 2021
Page 5: ...EAM20093 YAMAHA MOTOR CORPORATION U S A WR MOTORCYCLE LIMITED WARRANTY...
Page 8: ......
Page 10: ......
Page 52: ...MOTORCYCLE CARE AND STORAGE 1 40...
Page 62: ...ELECTRICAL SPECIFICATIONS 2 9 Radiator fan motor fuse 5 0 A Spare fuse 15 0 A...
Page 70: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view...
Page 72: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view...
Page 74: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view...
Page 76: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view...
Page 78: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view...
Page 80: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view...
Page 82: ...CABLE ROUTING DIAGRAM 2 29 Front brake front view and right side view...
Page 84: ...CABLE ROUTING DIAGRAM 2 31 Taillight top view and right side view...
Page 86: ...CABLE ROUTING DIAGRAM 2 33...
Page 203: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Oil filter element 2 Oil pump...
Page 204: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 4 1 Intake camshaft 2 Exhaust camshaft...
Page 278: ...TRANSMISSION 5 78...
Page 288: ...WATER PUMP 6 9...
Page 298: ...THROTTLE BODY 7 9...
Page 301: ......
Page 302: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM...
Page 306: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Page 312: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Page 315: ...CHARGING SYSTEM 8 14...
Page 316: ...SIGNALING SYSTEM 8 15 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM...
Page 320: ...LIGHTING SYSTEM 8 19 EAM20153 LIGHTING SYSTEM EAM30346 CIRCUIT DIAGRAM...
Page 323: ...LIGHTING SYSTEM 8 22...
Page 324: ...COOLING SYSTEM 8 23 EAM20155 COOLING SYSTEM EAM30350 CIRCUIT DIAGRAM...
Page 327: ...COOLING SYSTEM 8 26...
Page 328: ...FUEL INJECTION SYSTEM 8 27 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM...
Page 353: ...FUEL INJECTION SYSTEM 8 52...
Page 354: ...FUEL PUMP SYSTEM 8 53 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Page 388: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Page 398: ...CHASSIS 10 9...
Page 400: ......
Page 402: ......
Page 403: ...WR250FM 2021 WIRING DIAGRAM BAK 2819U 11_W D indd 1 2020 07 01 12 01 28...
Page 404: ...WR250FM 2021 WIRING DIAGRAM BAK 2819U 11_W D indd 2 2020 07 01 12 01 28...