CRANKSHAFT (YP250R)
5-120
NOTICE
ECA13970
To avoid scratching the crankshaft and to
ease the installation procedure, lubricate the
oil seal lips with lithium-soap-based grease
and each bearing with engine oil.
IP
Hold the connecting rod at top dead center
(TDC) with one hand while turning the nut of the
crankshaft installer bolt with the other. Turn the
crankshaft installer bolt until the crankshaft as-
sembly bottoms against the bearing.
EAS25700
ASSEMBLING THE CRANKCASE
1. Thoroughly clean all the gasket mating sur-
faces and crankcase mating surfaces.
2. Apply:
• Sealant
(onto the crankcase mating surfaces)
IP
Do not allow any sealant to come into contact
with the oil gallery.
3. Install:
• Right crankcase “1”
IP
Install the crankshaft assembly with the crank-
shaft installer pot “2”, crankshaft installer bolt “3”,
adapter “4”, and spacer “5”.
4. Install:
• Water pump assembly
• Crankcase bolts
IP
Tighten the crankcase bolts in stages and in a
crisscross pattern.
• M6 × 100 mm (3.94 in) bolts: “1”
• M6 × 70 mm (2.76 in) bolts: “2”
Yamaha bond No. 1215
90890-85505
(Three Bond No.1215®)
3
2
4
1
5
Crankshaft installer pot
90890-01274
Installing pot
YU-90058
Crankshaft installer bolt
90890-01275
Bolt
YU-90060
Adapter (M16)
90890-01280
Adapter #7
YM-90067
Spacer
90890-01288
T
R
.
.
Crankcase bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
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