Yamaha YZF-R1 (2006) [270/426] Crankcase

Yamaha YZF-R1 (2006) [270/426] Crankcase
CRANKCASE
5-67
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
stages 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
indicate the crankcase tightening sequence.
M6 × 50 mm (2.0 in) bolts: “1”, “7”
M6 × 60 mm (2.4 in) bolts: “2”, “3”
M6 × 70 mm (2.8 in) bolts: “4”, “6”, “8”
M6 × 60 mm (2.4 in) bolt and washer: “5”
M6 × 65 mm (2.5 in) bolts: “9”, “10”
M8 × 60 mm (2.4 in) bolts: “11”, “15”
M8 × 50 mm (2.0 in) bolts: “12” – “14”
M8 × 60 mm (2.4 in) bolt: “16” LOCTITE®
M9 × 105 mm (4.1 in) bolts: “17” – “26”
3. Remove:
Lower crankcase
CAUTION:
ECA13900
Tap on one side of the crankcase with a
soft-face hammer. Tap only on reinforced
portions of the crankcase, not on the
crankcase mating surfaces. Work slowly
and carefully and make sure the crankcase
halves separate evenly.
4. Remove:
Dowel pins
5. Remove:
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.
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.
EAS4C81014
CHECKING THE BEARING AND OIL SEALS
1. Check:
Bearings
Clean and lubricate the bearings, then
rotate the inner race with your finger.
Rough movement Replace.
2. Check:
Oil seals
Damage/wear Replace.
EAS25650
ASSEMBLING THE CRANKCASE
1. Lubricate:
Crankshaft journal bearings
(with the recommended lubricant)
2. Apply:
Sealant
NOTE:
Do not allow any sealant to come into contact
with the oil gallery or crankshaft journal bear-
ings. Do not apply sealant to within 2–3 mm
(0.08–0.12 in) of the crankshaft journal bear-
ings.
Recommended lubricant
Engine oil
Yamaha bond No. 1215
(Three Bond No.1215®)
90890-85505

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