Page 14 of 74
DESCRIPTION
2-1
2
EAU10410
Left view
NS50N
NS50N
12
34
5
6
7
1. Coolant reservoir cap (page 6-9)
2. Storage compartment (page 3-12)
3. Air filter element (page 6-10)
4. Kickstarter (page 3-11)
5. Final transmission oil filler cap (page 6-8)
6. Shock absorber assembly spring preload adjusting ring (page 3-13)
7. Final transmission oil drain bolt (page 6-8)U1PHE0E0.book Page 1 Wednesday, August 29, 2012 4:42 PM
Page 44 of 74

PERIODIC MAINTENANCE AND ADJUSTMENT
6-8
6
EAU20066
Final transmission oil The final transmission case must be
checked for oil leakage before each
ride. If any leakage is found, have a
Yamaha dealer check and repair the
scooter. In addition, the final transmis-
sion oil must be changed as follows at
the intervals specified in the periodic
maintenance and lubrication chart.
1. Start the engine, warm up the final
transmission oil by riding the
scooter for several minutes, and
then stop the engine.
2. Place the scooter on the center-
stand.
3. Place an oil pan under the final
transmission case to collect the
used oil.
4. Remove the final transmission oil
filler cap and its O-ring from the fi-
nal transmission case.5. Remove the final transmission oil
drain bolt and its gasket to drain
the oil from the final transmission
case.
6. Install the final transmission oil
drain bolt and its new gasket, and
then tighten the bolt to the speci-
fied torque.
7. Refill with the specified amount of
the recommended final transmis-
sion oil. WARNING! Make sure
that no foreign material entersthe final transmission case.
Make sure that no oil gets on the
tire or wheel.
[EWA11311]
8. Install the final transmission oil fill-
er cap and its new O-ring, and then
tighten the oil filler cap.
9. Check the final transmission case
for oil leakage. If oil is leaking,
check for the cause.
1. Final transmission oil drain bolt
2. Final transmission oil filler capTightening torque:
Final transmission oil drain bolt:
18 Nm (1.8 m·kgf, 13 ft·lbf)
12
ZAUM0273
Recommended final transmission
oil:
See page 8-1.
Oil quantity:
0.11 L (0.12 US qt, 0.10 Imp.qt)
U1PHE0E0.book Page 8 Wednesday, August 29, 2012 4:42 PM
Page 67 of 74

SCOOTER CARE AND STORAGE
7-4
7 2. Drain the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up. Pour the drained fuel into the
fuel tank.
3. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
4. Perform the following steps to pro-
tect the cylinder, piston rings, etc.
from corrosion.
a. Remove the spark plug cap
and spark plug.
b. Pour a teaspoonful of engine oil
into the spark plug bore.
c. Install the spark plug cap onto
the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder wall with oil.)
WARNING! To prevent dam-
age or injury from sparking,
make sure to ground thespark plug electrodes while
turning the engine over.
[EWA10951]
e. Remove the spark plug cap
from the spark plug, and then
install the spark plug and the
spark plug cap.
5. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
6. Check and, if necessary, correct
the tire air pressure, and then lift
the scooter so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
7. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
8. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place [less
than 0 °C (30 °F) or more than 30°C (90 °F)]. For more information
on storing the battery, see page
6-19.
TIPMake any necessary repairs before
storing the scooter.
U1PHE0E0.book Page 4 Wednesday, August 29, 2012 4:42 PM