CRANKCASE
5-68
EAM30147
DISASSEMBLING THE CRANKCASE
1. Separate:
•
Right crankcase
•
Left crankcase
a. Remove the crankcase bolts.
TIP
Loosen each bolt 1/4 of a turn at a time and after
all the bolts are loosened, remove them.
b. Remove the right crankcase “1”.
TIP
•
Place the crankcase with its left side down-
ward, split the crankcase splitting rib “a” while
tap with a soft hammer.
•
Lift the right crankcase horizontally while lightly
patting the crankcase splitting rib and the en-
gine mounting boss using a soft hammer, and
leave the crankshaft and the transmission with
the left crankcase.
NOTICE
ECA24690
Use soft hammer to tap on the case half. Tap
only on reinforced portions of case. Do not
tap on gasket mating surface. Work slowly
and carefully. Make sure the case halves
separate evenly. If the cases do not separate,
check for a remaining case bolt or fitting. Do
not force.
c. Remove the dowel pins.
2. Remove:
•
Bearing “1”
TIP
•
Remove the bearing from the crankcase by
pressing its inner race.
•
Do not use the removed bearing.
EAM30490
CHECKING THE TIMING CHAIN GUIDE
(EXHAUST SIDE)
1. Check:
•
Timing chain
Stiffness
Replace the camshaft sprocket,
timing chain and crankshaft sprocket as a
set.
2. Check:
•
Timing chain guide
Damage/wear
Replace.
EAM30150
CHECKING THE CRANKCASE
1. Wash:
•
Crankcase
TIP
•
Wash the crankcase in a mild solvent.
•
Remove any remaining gasket from the crank-
case mating surface.
2. Check:
•
Crankcase
Crack/damage
Replace.
•
Oil delivery passages
Obstruction
Blow out with compressed air.
1
a
a
Содержание YZ250FX 2021
Страница 6: ...EAM20162 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY ...
Страница 10: ......
Страница 61: ...TIGHTENING TORQUES 2 16 ...
Страница 62: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view ...
Страница 64: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view ...
Страница 66: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view ...
Страница 68: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view ...
Страница 70: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view ...
Страница 72: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view ...
Страница 74: ...CABLE ROUTING DIAGRAM 2 29 ...
Страница 112: ...ELECTRICAL SYSTEM 3 36 ...
Страница 153: ...HANDLEBAR 4 39 Throttle grip free play 3 0 6 0 mm 0 12 0 24 in ...
Страница 166: ...FRONT FORK 4 52 1 ...
Страница 184: ...CHAIN DRIVE 4 70 ...
Страница 189: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Oil filter element 2 Oil pump ...
Страница 190: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 4 1 Intake camshaft 2 Exhaust camshaft ...
Страница 191: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Camshaft 2 Oil pressure check bolt 3 Oil pump 4 Oil filter element ...
Страница 245: ...SHIFT SHAFT 5 59 TIP Align the punch mark a on the shift shaft with the punch mark b in the shift pedal 1 1 2 2 a b ...
Страница 251: ...OIL PUMP 5 65 A Primary drive gear side B Crankcase cover side 5 7 mm 0 02 0 28 in 5 c d 6 8 b 8 6 7 E ...
Страница 264: ...TRANSMISSION 5 78 ...
Страница 274: ...WATER PUMP 6 9 ...
Страница 284: ...THROTTLE BODY 7 9 ...
Страница 287: ......
Страница 288: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM ...
Страница 292: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM ...
Страница 296: ...CHARGING SYSTEM 8 9 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM ...
Страница 299: ...CHARGING SYSTEM 8 12 ...
Страница 300: ...SIGNALING SYSTEM 8 13 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM ...
Страница 304: ...FUEL INJECTION SYSTEM 8 17 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM ...
Страница 329: ...FUEL INJECTION SYSTEM 8 42 ...
Страница 330: ...FUEL PUMP SYSTEM 8 43 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM ...
Страница 362: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15 ...
Страница 372: ...CHASSIS 10 9 ...
Страница 374: ......
Страница 376: ......
Страница 377: ...YZ250FXM 2021 WIRING DIAGRAM BAJ 2819U 11_WD indd 1 2020 06 29 15 46 05 ...
Страница 378: ...YZ250FXM 2021 WIRING DIAGRAM BAJ 2819U 11_WD indd 2 2020 06 29 15 46 06 ...