Yamaha F400A 2022 - Checking the Journal Oil Clearance

7-88
Cylinder block
Checking the journal oil clearance
TIP:
• After checking the journal oil clearance,
check the crankcase bolts. See “Checking
the crankcase bolt” (7-83).
• Clean the mating surfaces of the parts in ad-
vance.
1. Install:
• Crankshaft journal bearings “1”
•Crankshaft “2”
(into the cylinder block) “3”
TIP:
Install the crankshaft journal bearings “1” in
their original positions.
2. Install:
•Plastigauge (PG-1) “1”
Do not place the Plastigauge (PG-1) over
the oil hole in each crankshaft journal.
TIP:
Place a piece of Plastigauge (PG-1) “1” onto
the crankshaft journal, parallel to the crank-
shaft.
3. Install:
• Crankshaft journal bearings
(into the crankcase)
TIP:
Install the crankshaft journal bearings in their
original positions.
4. Install:
•Crankcase
a. Tighten the crankcase bolts (M10) “1”
to the specified torques in 2 stages and
in the order [1], [2], and so on.
b. Tighten the crankcase bolts (M8) “2”
and “3” to the specified torques in 2
stages and in the order [21], [22], and
so on.
TIP:
• When checking the oil clearance, reuse the
removed crankcase bolts.
• Do not turn the crankshaft until the journal oil
clearance measurement has been complet-
ed.
• In the second tightening stage for the M10
crankcase bolts “1”, mark the M10 bolts and
the crankcase with identification marks “a”,
and then tighten the bolts 90° from the
marks on the crankcase.
3
2
1
11
1
1
3
2
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