Yamaha YZ250FX 2021, Owner'S Manual

Page: 57 / 164

ENGINE
3-9
7. Install:
• Spark plug
TIP
Before installing the spark plug, clean the spark
plug and gasket surface.
8. Install:
•
Spark plug cap
• Holder
•
Fuel tank
• Air scoop (left/right)
•
Seat
• Side cover (left/right)
Refer to “GENERAL CHASSIS” on page 4-1.
EAM30224
CHECKING THE ENGINE OIL LEVEL
1. Stand the vehicle upright on a level surface.
2. Start the engine, warm this up for 2–3 min-
utes, and then stop the engine and wait about
1 minute.
3. Check:
• Oil level
The engine oil level should be between the
minimum level mark “a” and maximum level
mark “b”.
Below the minimum level mark

Add the
recommended engine oil to the proper level.
NOTICE
ECA24290
• Since engine oil also lubricates the clutch,
the wrong oil types or additives could
cause clutch slippage. Therefore, do not
add any chemical additives.
• Do not allow foreign material to enter the
crankcase.
EAM30225
CHANGING THE ENGINE OIL
Stand the vehicle upright on a level surface.
1. Start the engine, warm this up for several
minutes, and then stop the engine and wait
about 5 minutes.
TIP
This model is equipped with an engine auto-stop
system. The engine stops automatically if left
idling for 7 minutes. If the engine stops, push the
start switch to restart the engine.
2. Place an oil pan under the drain bolt.
3. Remove:
• Engine guard “1”
•
Oil filler cap “2”
• Drain bolt (with gasket) “3”
Spark plug
13 N·m (1.3 kgf·m, 9.6 lb·ft)
1
2
1
1
a a
T
R
.
.
a
b
Recommended brand
YAMALUBE
SAE viscosity grades
10W-40, 10W-50, 15W-40, 20W-
40 or 20W-50
Recommended engine oil grade
API service SG type or higher,
JASO standard MA