Yamaha F400A 2022 - Checking the Camshaft Journal Oil Clearance

Camshaft
7-51
3. Measure:
• Camshaft runout
Out of specification → Replace.
Checking the camshaft journal oil
clearance
1. Install:
• Camshafts
•Plastigauge (PG-1) “1”
Do not place the Plastigauge (PG-1) over
the oil hole in each camshaft journal.
TIP:
Place the camshafts onto the cylinder head,
and then place a piece of Plastigauge (PG-1)
“1” onto each camshaft journal, parallel to the
camshaft.
2. Install:
•Dowels
• Camshaft caps “1”, “2”, “3”
• Camshaft cap bolts (M7 × 48 mm) “4”
(temporarily)
• Camshaft cap bolts (M7 × 36 mm) “5”
(temporarily)
TIP:
Install the camshaft caps “1”, “2”, and “3” in
their proper positions so that the stamped
numbers are upside down.
3. Tighten:
• Camshaft cap bolts “1”, “2”
TIP:
• Tighten the camshaft cap bolts “1” and “2”
to the specified torques in 2 stages and in
the order [1], [2], and so on.
• Do not turn the camshafts when measuring
the camshaft journal oil clearance using the
Plastigauge.
Cam lobe height IN
47.311–47.411 mm (1.8626–
1.8666 in)
Limit
47.261 mm (1.8607 in)
Cam lobe height EX
46.600–46.700 mm (1.8346–
1.8386 in)
Limit
46.550 mm (1.8327 in)
Fuel pump cam width across cor-
ner (DI pump)
49.350-49.450 mm (1.9429-
1.9468 in)
Runout
0.030 mm (0.0012 in)
1
EE EE
PORT STBD
1P
2
2P
3P
4P
8S
7S
6S
9S
10S
11S
5P
7P
6P
8P
9P
10P
11P
4 5
1S
2S
3S
4S
5S
2
4
3
4
5
1
3
4
5
1
4