CRANKSHAFT AND BALANCER SHAFT
5-78
EAS31072
REMOVING THE BALANCER SHAFT
JOURNAL BEARINGS
1. Remove:
• Balancer shaft journal lower bearings
(from the lower crankcase)
• Balancer shaft journal upper bearings
(from the upper crankcase)
TIP
Identify the position of each balancer shaft jour-
nal bearing so that it can be reinstalled in its orig-
inal place.
EAS31074
REMOVING THE CRANKSHAFT JOURNAL
BEARINGS
1. Remove:
• Crankshaft journal lower bearings
(from the lower crankcase)
• Crankshaft journal upper bearings
(from the upper crankcase)
TIP
Identify the position of each crankshaft journal
bearing so that it can be reinstalled in its original
place.
EAS31314
REMOVING THE CONNECTING RODS
The following procedure applies to both of the
connecting rods.
1. Remove:
• Connecting rod cap
• Connecting rod
• Big end bearings
TIP
Identify the position of each connecting rod cap,
connecting rod, and big end bearing so that it
can be reinstalled in its original place.
EAS31142
CHECKING THE BALANCER SHAFT
ASSEMBLY
1. Check:
• Balancer driven gear
Cracks/damage/wear
→
Replace the balanc-
er drive gear and balancer shaft assembly as
a set.
Excessive noise during operation
→
Replace
the balancer drive gear and balancer shaft
assembly as a set.
2. Measure:
• Balancer shaft runout
Out of specification
→
Replace the balancer
shaft assembly.
3. Check:
• Balancer shaft assembly
Cracks/damage/wear
→
Replace the balanc-
er shaft assembly and journal bearings.
Dirt
→
Clean.
• Bearings
Damage/wear
→
Replace.
4. Measure:
• Balancer shaft-journal-to-balancer shaft-jour-
nal-bearing clearance
Out of specification
→
Replace the balancer
shaft journal bearings.
NOTICE
ECA18400
Do not interchange the balancer shaft jour-
nal bearings. To obtain the correct balancer
shaft-journal-to-balancer shaft-journal-bear-
ing clearance and prevent engine damage,
the balancer shaft journal bearings must be
installed in their original positions.
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a. Clean the balancer shaft journal bearings,
balancer shaft journals, and bearing portions
of the crankcase.
b. Install the balancer shaft journal lower bear-
ings “1” and the balancer shaft assembly into
the lower crankcase.
Balancer shaft runout limit
0.050 mm (0.0020 in)
Balancer shaft journal to balanc-
er shaft bearing clearance
0.021–0.045 mm (0.0008–0.0018
in)
Summary of Contents for YZF-R25
Page 1: ......
Page 2: ......
Page 3: ......
Page 6: ......
Page 8: ......
Page 25: ...BASIC SERVICE INFORMATION 1 16 ...
Page 32: ...SPECIAL TOOLS 1 23 ...
Page 49: ...TIGHTENING TORQUES 2 16 2 6 8 5 4 1 2 6 3 7 2 10 9 A ...
Page 66: ...COOLING SYSTEM DIAGRAMS 2 33 EAS20020 COOLING SYSTEM DIAGRAMS 1 2 3 1 5 4 4 ...
Page 99: ......
Page 128: ...PERIODIC MAINTENANCE 3 29 ...
Page 146: ...GENERAL CHASSIS 5 4 15 1 b b a a 2 ...
Page 200: ...FRONT FORK 4 69 2 b a 1 ...
Page 209: ...SWINGARM AND REAR SHOCK ABSORBER ASSEMBLY 4 78 2 1 1 1 a A B ...
Page 214: ...CHAIN DRIVE 4 83 ...
Page 256: ...CYLINDER AND PISTONS 5 39 1 ...
Page 310: ...TRANSMISSION 5 93 ...
Page 322: ...WATER PUMP 6 11 ...
Page 336: ...THROTTLE BODIES 7 13 c 1 cylinder d 2 cylinder A Left B Right b a d c A B b 1 ...
Page 337: ...THROTTLE BODIES 7 14 ...
Page 338: ...AIR INDUCTION SYSTEM 7 15 EAS20071 AIR INDUCTION SYSTEM 1 2 3 4 5 1 2 ...
Page 342: ...AIR INDUCTION SYSTEM 7 19 ...
Page 345: ......
Page 355: ...ELECTRIC STARTING SYSTEM 8 10 ...
Page 359: ...CHARGING SYSTEM 8 14 ...
Page 371: ...SIGNALING SYSTEM 8 26 ...
Page 417: ...FUEL PUMP SYSTEM 8 72 ...
Page 420: ...ELECTRICAL COMPONENTS 8 75 2 3 4 5 12 11 10 9 8 7 1 6 ...
Page 440: ...ELECTRICAL COMPONENTS 8 95 ...
Page 451: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 10 ...
Page 453: ......
Page 454: ......