Yamaha 2004 YP400 Service Manual page 104

CHANGING THE ENGINE OIL
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10.Fill:
• crankcase
(with the specified amount of the recom-
mended engine oil)
Quantity
Total amount
1.7 L (1.50 Imp qt, 1.80 US qt)
Without oil filter element
replacement
1.5 L (1.32 Imp qt, 1.59 US qt)
With oil filter element replace-
ment
1.7 L (1.50 Imp qt, 1.80 US qt)
11.Install:
• engine oil filler cap
12.Start the engine, warm it up for several min-
utes, and then turn it off.
13.Check:
• engine
(for engine oil leaks)
14.Check:
• engine oil level
Refer to "CHECKING THE ENGINE OIL
LEVEL".
15.Check:
• engine oil pressure
M MMM M MMM M M MMM M
a. Slightly loosen the oil gallery bolt 1.
b. Start the engine and keep it idling until
engine oil starts to seep from the oil gallery
bolt. If no engine oil comes out after one
minute, turn the engine off so that it will not
seize.
c. Check the engine oil passages, the oil filter
element and the oil pump for damage or
leakage. Refer to "OIL PUMP" in chapter 5.
d. Start the engine after solving the problem(s)
and check the engine oil pressure again.
e. Tighten the oil gallery bolt to specification.
Oil gallery bolt
10 Nm (1.0 m · kg, 7.2 ft · lb)
L LLL L LLL L L LLL L
CHK
ADJ
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
MMM
LLL