Yamaha WR250F Owner's Service Manual page 66

• Oil filler cap "4"
• Oil tank drain bolt "5"
• Crankcase oil drain bolt "6"
• Oil filter element drain bolt "7"
Drain the crankcase and oil tank
of its oil.
5. Remove:
• Oil hose clamp "1"
• Bolt (oil hose)
• Oil hose "2"
• Oil strainer "3"
6. Inspect:
• Oil strainer
→
Clogged Blow.
7. If the oil filter is to be replaced dur-
ing this oil change, remove the fol-
lowing parts and reinstall them.
Replacement steps:
a. Remove the oil filter element cov-
er "1" and oil filter element "2".
b. Check the O-rings "3", if cracked
or damaged, replace them with a
new one.
c. Install the oil filter element and oil
filter element cover.
Oil filter element cover:
10 Nm (1.0 m•kg, 7.2
ft•lb)
8. Install:
• O-ring "1"
• Oil strainer "2"
Oil strainer:
9 Nm (0.9 m•kg, 6.5
ft•lb)
• Oil hose
• Bolt (oil hose)
Bolt (oil hose):
8 Nm (0.8 m•kg, 5.8
ft•lb)
• Oil hose clamp
Oil hose clamp:
2 Nm (0.2 m•kg, 1.4
ft•lb)
9. Install:
• Copper washer
• Oil filter element drain bolt
Oil filter element drain
bolt:
10 Nm (1.0 m•kg, 7.2
ft•lb)
• Crankcase oil drain bolt
Crankcase oil drain bolt:
20 Nm (2.0 m•kg, 14
ft•lb)
• Oil tank drain bolt
Oil tank drain bolt:
18 Nm (1.8 m•kg, 13
ft•lb)
• Engine guard
Engine guard:
7 Nm (0.7 m•kg, 5.1
ft•lb)
10. Fill:
3-13
ENGINE
• Engine oil
Oil quantity:
Periodic oil change:
1.1 L (0.97 Imp qt, 1.16
US qt)
With oil filter replace-
ment:
1.2 L (1.06 Imp qt, 1.27
US qt)
Total amount:
1.4 L (1.23 Imp qt, 1.48
US qt)
11. Check:
• Oil leakage
12. Install:
• Oil filler cap
• Washer (oil tank)
• Bolt (oil tank)
Bolt (oil tank):
7 Nm (0.7 m•kg, 5.1
ft•lb)
13. Check:
• Engine oil level
CHECKING THE OIL PRESSURE
1. Check:
• Oil pressure
Checking steps:
a. Slightly loosen the oil pressure
check bolt "1".
b. Start the engine and keep it idling
until oil starts to seep from the oil
pressure check bolt. If no oil
comes out after one minute, turn
the engine off so it will not seize.
c. Check oil passages and oil pump
for damage or leakage.
d. Start the engine after solving the
problem(s) and recheck the oil
pressure.
e. Tighten the oil pressure check
bolt.
Oil pressure check bolt:
10 Nm (1.0 m•kg, 7.2
ft•lb)