2021 YAMAHA PW50 torque

Periodic maintenance an d a djustment
7-2
7
EAU17303
Emission controls not only function to
ensure cleaner air, but are also vital to
proper engine operation and maximum
performance. In the following periodic
maintenance charts, the services relat-
ed to emissions control are grouped
separately. These services require
specialized data, knowledge, and
equipment. Maintenance, replace-
ment, or repair of the emission control
devices and systems may be per-
formed by any repair establishment or
individual that is certified (if applicable).
Yamaha dealers are trained and equipped to perform these particular
services.
EAU17312
Owner’s tool kit
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.
TIP
If you do not have the tools or experi-
ence required for a particular job, have
a Yamaha dealer perform it for you.
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Periodic maintenance an d a djustment
7-7
7 To install the spark plu
g
1. Clean the surface of the spark plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
2. Install the spark plug with the spark plug wrench, and then tight-
en it to the specified torque.
TIP
If a torque wrench is not available
when installing a spark plug, a good
estimate of the correct torque is 1/4…
1/2 turn past finger tight. However, the
spark plug should be tightened to the
specified torque as soon as possible.
3. Install the spark plug cap.
EAU41104
Removin g the power re duc-
tion plate
To obtain full engine performance ca-
pability, removing the power reduction
plate is required.
1. Remove the exhaust manifold by removing the bolts. WARNING!
Always let the exhaust system
cool prior to touchin g exhaust
components.
[EWA14582]
2. Remove the gasket.
3. Remove the power reduction plate.
Tightenin g torque:
Spark plug: 20 N·m (2.0 kgf·m, 15 lb·ft)
1. Exhaust manifold bolt
1. Exhaust manifold
2. Gasket
3. Power reduction plate
1
1
2
3
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Periodic maintenance an d a djustment
7-8
7
TIP
Store the power reduction plate with
the Owner’s Manual so that it is readily
available whenever you want to reduce
the engine power.
4. Install the exhaust manifold and its
new gasket by installing the bolts,
and then tighten the bolts to the
specified torque.
EAU40896
Transmission oil
The transmission must be checked for
oil leakage before each ride. If any
leakage is found, have a Yamaha deal-
er check and repair the motorcycle. In
addition, the transmission oil must be
changed at the intervals specified in
the periodic maintenance and lubrica-
tion chart.
To chan ge the transmission oil
1. Place the motorcycle on the cen- terstand.
2. Place an oil pan under the trans- mission to collect the used oil.
3. Remove the transmission oil filler cap, the transmission oil drain bolt
and its gasket to drain the oil from
the transmission.
Tightening torque:
Exhaust manifold bolt: 9 N·m (0.9 kgf·m, 6.6 lb·ft)
1. Transmission oil filler cap
1. Transmission oil drain bolt
2. Gasket
1
12
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Periodic maintenance an d a djustment
7-9
7 4. Install the transmission oil drain
bolt and its new gasket, and then
tighten the bolt to the specified
torque.
5. Refill with the specified amount of the recommended transmission
oil.
NOTICE
ECA10453
In or der to prevent clutch slip-
pa ge (since the transmission oil
also lu bricates the clutch), d o
not mix any chemical additives.
Do not use oils with a diesel
specification of “CD” or oils of a
hi gher quality than specifie d. In
a ddition, do not use oils la bele d
“ENERGY CONSERVING II” or
hi gher.
 Make sure that no forei gn mate-
rial enters the transmission.
6. Check the O-ring for damage, and replace it if necessary. 7. Install and tighten the transmis-
sion oil filler cap.
8. Start the engine, and then let it idle for several minutes while checking
the transmission for oil leakage. If
oil is leaking, immediately turn the
engine off and check for the
cause.
Tightenin g torque:
Transmission oil drain bolt: 14 N·m (1.4 kgf·m, 10 lb·ft)
Recommen ded transmission oil:
See page 9-1.
Oil chan ge quantity:
0.30 L (0.32 US qt, 0.26 Imp.qt)
1. O-ring
1
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Periodic maintenance an d a djustment
7-24
7
3. Insert the wheel axle from the right
side.
4. Install the washer and axle nut, and then tighten the axle nut to the
specified torque.
5. Connect the brake cable at the wheel hub, and then install the
brake lever free play adjusting nut.
6. Adjust the brake lever free play. (See page 7-17.)
7. Take the motorcycle off the cen- terstand so that the front wheel is
on the ground.
8. Push down hard on the handlebar several times to check for proper
fork operation.
EAU25081
Rear wheel
EAU56822
To remove the rear wheel
WARNING
EWA10822
To avoi d injury, securely support the
vehicle so there is no dan ger of it
fallin g over.
1. Place the motorcycle on the cen-
terstand.
2. Remove the seat. (See page 4-8.)
3. Remove the muffler bolt and washers. WARNING! Always let
the exhaust system cool prior to
touchin g exhaust components.
[EWA14582]
4. Slide the spring clamp down, and
then remove the muffler.
5. Remove the exhaust chamber bolt and washers.
Tightening torque:
Axle nut: 36 N·m (3.6 kgf·m, 27 lb·ft)
1. Muffler
2. Washer
3. Muffler bolt
4. Spring clamp
312 4
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Periodic maintenance an d a djustment
7-26
7
6. While applying the rear brake,
tighten the axle nut to the speci-
fied torque.
7. Tighten the rear arm nuts and rear shock absorber mounting bolt to
the specified torques.
8. Install the exhaust chamber by in- stalling the bolt and washers.
9. Install the power reduction plate, a new gasket, and then install the
exhaust manifold bolts.
10. Tighten the exhaust manifold bolts and exhaust chamber bolt to the
specified torques. 11. Install the muffler by sliding the
spring clamp up to its original po-
sition, and then installing the
washers and muffler bolt.
TIP
Make sure that the spring clamp is po-
sitioned with the projection side facing
inward.
12. Tighten the muffler bolt to thespecified torque.
13. Adjust the brake lever free play. (See page 7-17.)
14. Install the seat.
Ti ghtening torques:
Axle nut: 60 N·m (6.0 kgf·m, 44 lb·ft)
Rear arm nut:
29 N·m (2.9 kgf·m, 21 lb·ft)
Rear shock absorber mounting bolt: 23 N·m (2.3 kgf·m, 17 lb·ft)
1. Exhaust manifold
2. Gasket
3. Power reduction plate
4. Exhaust manifold bolt
Tightening torques:
Exhaust manifold bolt: 9 N·m (0.9 kgf·m, 6.6 lb·ft)
Exhaust chamber bolt:
18 N·m (1.8 kgf·m, 13 lb·ft)
2
3
4
1
1. Exhaust chamber
2. Spring clamp
3. Muffler
Tightenin g torque:
Muffler bolt: 18 N·m (1.8 kgf·m, 13 lb·ft)
1
2
3
U2SA87E0.book Page 26 Monday, April 6, 2020 3:00 PM