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3. Add oil
a. Replace the filter element with a measuring cup with a
viscosity of SAE5W-40/10W-40/10W-50. The new API SN
grade or higher motorcycle special machine 1.75L (1.85US qt,
1.54 lmp qt, 0.46 US gal, 0.39 lmp gal). If the filter element is
not replaced, the measuring cup is filled with 1.55L（1.64US
qt,1.36 lmp qt,0.41 US gal,0.34 lmp gal).
b. Use a funnel + measuring cup to add engine oil to the
fuel filler opening on the right crankcase cover of the engine.
c. Wipe clean the fuel filler opening with a non-woven
cloth.
d.inspection O ring⑵Whether there is damage or aging, if
not, wipe it clean, if any, replace it.
e. Wipe clean the oil dipstick, and turn the oil dipstick⑴
and O-ring⑵ clockwise by hand to replace the right
crankcase cover of the engine.
4. Change gear box oil
a. Place an oil pan under the rear of the left engine. Rotate
the fuel filler nut⑴ counterclockwise, and remove the nut⑴
and O ring⑵.
b. Use a 14# sleeve to loosen the oil drain bolt⑶
counterclockwise.
c. Remove the oil drain bolt⑶ and the copper pad⑷.
d. After the gear box oil is completely drained, wipe the
surface of the drain port with a non-woven cloth.
e. Replace with a new copper pad⑷, check whether the
joint surface of the oil drain bolt⑶ is scratched, if not, wipe
it clean and install it in order. Torque: 20 N.m (2 kgf.m, 15
lbf.ft).
f. Fill the measuring cup with 0.2L(0.21US qt, 0.18 lmp qt,
0.05 US gal, 0.04 lmp gal) of oil or gearbox special oil.
g. Check whether the O ring⑷ is damaged or aging, wipe
it clean if not, and replace it if there is any.
h. Wipe clean the nut⑶ and the fuel filler port with a non-
woven cloth, first put the O ring⑷ into the nut⑶, and then
turn it clockwise by hand and install it back to the fuel filler
port of the gear box.
5. Confirm the oil level
a. After starting the motorcycle and running at idle speed
for several minutes, check whether all the disassembled
positions are leaking, and if there is any leakage, it needs to
be checked.
b. After the engine has been idling for 5 minutes and then
turned off for 3 minutes, check whether the oil level meets
the standard. If it does not meet the standard, draw it out or
add it to the standard.
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