Joyner JNSZ650UV4S Owner's Manual page 67

b. Dismantle the bolt M6(PIC.01)/M8(PIC.02) from the main case of front/rear
main reducer , then let the old oil vented out .
c. Before adding the new oil ,please screw the bolt M6(PIC.01)/M8(PIC.02)
properly.
d. Dismantle the bolt "4"and washer "3"(PIC.03),then add the new oil
(GL-5,85W-90) and it is about 400-450 mL .
e. The final , screw the bolt "4" and washer "3" properly(PIC.03).
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