Yamaha YP125R Service Manual

ENGINE (YP250R)
3-28
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6. Install:
• Engine oil drain bolt
(along with the gasket )
7. Fill:
• Crankcase
(with the specified amount of the recom-
mended engine oil)
8. Install:
• Engine oil filler cap
9. Start the engine, warm it up for several min-
utes, and then turn it off.
10.Check:
• Engine
(for engine oil leaks)
11.Check:
• Engine oil level
Refer to “CHECKING THE ENGINE OIL
LEVEL” on page 3-26.
12.Check:
• Engine oil pressure
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a. Slightly loosen the oil check bolt “1”.
b. Start the engine and keep it idling until engine
oil starts to seep from the oil check 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 and the oil
pump for damage or leakage. Refer to “OIL
PUMP (YP250R)” on page 5-108.
d. Start the engine after solving the problem(s)
and check the engine oil pressure again.
e. Tighten the oil check bolt to specification.
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13.Reset:
• Oil change indicator
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a. Set the main switch to “ON”.
b. Push the “OIL CHANGE” button “1” for 15 to
20 seconds.
c. Release the button and the oil change indica-
tor will go off.
T
IP
If the engine oil is changed before the oil change
indicator comes on (i.e., before the periodic oil
change interval has been reached), the oil
change indicator must be reset as soon as pos-
sible so that it comes on for the next periodic oil
change.
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EAS20830
CHANGING THE FINAL TRANSMISSION OIL
1. Stand the vehicle on a level surface.
T
IP
• Place the vehicle on the centerstand.
• Make sure that the vehicle is upright.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Place a container under the final transmis-
sion.
4. Remove:
• Oil filler cap “1”
• O-ring “2”
T
R
.
.
Oil strainer cover
32 Nm (3.2 m·kgf, 23 ft·lbf)
T
R
.
.
Engine oil drain bolt
20 Nm (2.0 m·kgf, 14 ft·lbf)
Engine oil quantity
Total amount
1.50 L (1.59 US qt, 1.32 Imp.qt)
Periodic oil change
1.30 L (1.37 US qt, 1.14 Imp.qt)
New
1
T
R
.
.
Oil check bolt
7 Nm (0.7 m·kgf, 5.1 ft·lbf)
1

Yamaha YP125R Specifications

General

Engine Type	Liquid-cooled, 4-stroke, SOHC, 4-valve
Bore x Stroke	52.4 mm x 57.9 mm
Fuel System	Fuel Injection
Ignition System	TCI
Transmission	V-Belt Automatic
Front Suspension	Telescopic fork
Rear Suspension	Unit Swing
Front Brake	Hydraulic single disc, Ø267 mm
Starter System	Electric
Rear Tyre	140/70-14M/C 62P (Tubeless)