Lubrication Intervals; Engine - Yamaha QT 50F Service Manual

B. Lubrication Intervals
Unit: km (mi)
1 '
Item
• Transmission oil
* Conrol and mete
cables
Throttle grip an<j
housing
Brake lever ,
Brake cam shaft
Steering bearing
Speedometer ge
housing
Wheel bearings
Middle and final
gear
* Indicates pre-opera
r
s
ar
tion chec
Remarks
Replace/Warm engine
before draining
Apply thoroughly
Apply lightly
Apply lightly
Apply lightly
Inspect thoroughly/Pack
moderately
Inspect thoroughly/Pack
moderately
Do not over-pack
yearly or ...
See page 5-7 to repack
grease
k items.
Type
Yamalube 4-cycle Oil or SAE
10W/30 type "SE" motor oil
SAE 10W/30 motor oil
Lithium base grease
Lithium base grease
Lithium base grease
Medium-weight wheel bearing
grease
Lithium base grease
Medium-weight wheel bearing
grease
Lithium base wheel bearing grease
(EX. SHELLLETHINAXA)
Initial
1
month
O
3
months
Check
O
O
o
6
months
O
O
O
0
0
Check
Thereafter every
6
months
O
O
0
1
year
O
O
2
years
2
years
O
2
years
2-3. ENGIN
A. Carburetcir
1. Pilot air screw
Turn air adjusting screw until it lightly
seats, then back it out to specification.
This adjustment can be made with
engine stopped.
Air screw (Turns out): 1-3/4 [1-1/2]
[ ] : After engine serial No. 3L5-702401
2. Start the bngine and let it warm up.
3. Throttle stop screw
Turn throttle stop screw in or out to
1. Pilot air screw 2. Throttle stop screw
achieve
specified
Idling speed
mooth engine operation
die speed.
at
1,700 r/min
4. Throttle cable
a. Throttle cable 2.
Loosen cable adjuster lock nut (at top
of carburetor) and turn cable adjuster
until specified free play is obtained.
Retighten lock nut.
NOTE:
The pilot air knd throttle stop screws are
separate adjustments but they must be
adjusted at the same time to achieve opti-
mum operating condition at engine idle
speeds.
Free play: 1.0 mm (0.04 in)
1. Adjuster 2. Lock nut
2-3
r '
;
III
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