Disassembling The Crankcase - Yamaha YZF-R1S Service Manual

CRANKCASE
EAS00384

DISASSEMBLING THE CRANKCASE

1. Place the engine upside down.
2. Remove:
S crankcase bolts
NOTE:
S Loosen each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern. After all of
the bolts are fully loosened, remove them.
S Loosen the bolts in decreasing numerical or-
der (refer to the numbers in the illustration).
S The numbers embossed on the crankcase in-
dicate the crankcase tightening sequence.
105 mm (4.1 in) bolts: 1 X
M9
M8 60 mm (2.4 in) bolt:
M8 60 mm (2.4 in) bolts:
M6 70 mm (2.8 in) bolts:
M6 65 mm (2.5 in) bolts:
M6 60 mm (2.4 in) bolts:
M6 50 mm (2.0 in) bolts:
M8 50 mm (2.0 in) bolts:
3. Remove:
S lower crankcase
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
mating surfaces. Work slowly and carefully
and make sure the crankcase halves sepa-
rate evenly.
4. Remove:
S dowel pins
5. Remove:
S crankshaft journal lower bearing
(from the lower crankcase)
NOTE:
Identify the position of each crankshaft journal
lower bearing so that it can be reinstalled in its
original place.
5-74
ENG
10

11 LOCTITE
12 , 16
, ,
19 21 23
17 , 18
, ,
22 24 25
20 , 26
X
13 15