Disassembling The Crankcase; Checking The Crankcase; Checking The Oil Delivery Pipes; Checking The Bearings And Oil Seal - Yamaha FJR1300AS(X) Service Manual

EAS25550

DISASSEMBLING THE CRANKCASE

1. Place the engine upside down.
2. Remove:
• Crankcase bolts
NOTE:
• Loosen each bolt 1/4 of a turn at a time, in stag-
es and in a crisscross pattern. After all of the
bolts are fully loosened, remove them.
• Loosen the bolts in decreasing numerical order
(refer to the numbers in the illustration).
• The numbers embossed on the crankcase in-
dicate the crankcase tightening sequence.
• M9 × 115 mm bolts: "1"–"10"
• M8 × 65 mm bolt: "11"
• M8 × 50 mm bolt: "12"
• M6 × 80 mm bolts: "23", "25"
• M6 × 65 mm shoulder bolts: "13", "14"
• M6 × 65 mm bolts: "19", "22", "24", "26"
• M6 × 55 mm bolts: "15"–"18", "20", "21", "27"–
"30"
• M6 × 45 mm bolt: "31"
13 21 18
7 5
10
4
25
11
12
31
28
3. Remove:
• Lower crankcase
ECA13900
CAUTION:
Tap on one side of the crankcase with a soft-
face hammer. Tap only on reinforced por-
tions of the crankcase, not on the crankcase
17 20
16
15
19 22
1
3
9
6
2
8
23
14
24
29
30
27
26
mating surfaces. Work slowly and carefully
and make sure the crankcase halves sepa-
rate evenly.
EAS25580

CHECKING THE CRANKCASE

1. Thoroughly wash the crankcase halves in a
mild solvent.
2. Thoroughly clean all the gasket surfaces and
crankcase mating surfaces.
3. Check:
• Crankcase
Cracks/damage → Replace.
• Oil delivery passages
Obstruction → Blow out with compressed air.
EAS25600

CHECKING THE OIL DELIVERY PIPES

The following procedure applies to all of the oil
delivery pipes.
1. Check:
• Oil delivery pipe
Damage → Replace.
Obstruction → Wash and blow out with com-
pressed air.
ET3P61026

CHECKING THE BEARINGS AND OIL SEAL

1. Check:
• Bearings
Clean and lubricate the bearings, then rotate
the inner race with your finger.
Rough movement → Replace.
• Oil seal
Damage/wear → Replace.
EAS25620
CHECKING THE TIMING CHAIN AND OIL
PUMP DRIVE CHAIN
1. Check:
• Timing chain
Damage/stiffness → Replace the timing
chain and camshaft sprockets as a set.
• Oil pump drive chain
Damage/stiffness → Replace the oil pump
drive chain, oil pump drive sprocket and oil
pump shaft as a set.
2. Check:
• Oil pump drive sprocket
Cracks/damage/wear → Replace the oil
pump drive sprocket and the oil pump drive
chain as a set.
5-103
CRANKCASE