Crankshaft Installation - Yamaha YTZ250S 1986 Service Manual

2. Remove the dial gauge and slide the con-
necting rod to one side. Insert a thickness
gauge between the side of the connec-
ting rod big end and the crank wheel.
Measure clearance.
Connecting rod big end side clearance
(0):
0.25-0.75 mm (0.01-0.029 in)
Run out limit
(e)
Flywheel width (A)
O.03mm (O.OO12in)
62
:!:8.05mm
(2.44
~ g.OO2
in)
3. If any of the above measurements exceed
tolerance, crankshaft repair is required.
Take the machine to your authorized
Yamaha dealer.
Crankshaft Installation
1. Set the crankshaft into left case half and
install crankshaft installing tool.
1. Spacer
3. Adapter
2. Crankshaft installing pot
4. Crankshaft installing bolt
To protect the crankshaft against scrat-
ches or to facilitate the operation of in-
stallation: Pack the oil seal lips with
grease. Apply engine oil to each bearing.
2. Hold the connecting rod at top dead
center with one hand while turning the
handle of the installing tool with the other.
Operate tool until crankshaft bottoms
against bearing.
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