Qlink RD400 User Manual page 118

5. Fill the differential gear case with the specified amount
of the recommended oil.
NOTE:
Do not exceed the specified differential gear oil quantity
when filling. Overfilling will cause the oil to seep out
of the breather hose during and after riding.
The differential gear oil level cannot bechecked. The
differential gear case capacity is greater than the
recommended oil quantity, therefore the oil level cannot
be accurately checked from the oil filler cap hole.
Recommended oil:
SAE 80 API "GL-4" Hypoid gear oil
Oil quantity:
0.35 L (0.31 Imp qt, 0.37 US qt)
USER'S MANUAL
Be sure no foreign material enters the differential gear
case.
6. Install the oil filler bolt, and then tighten it to the
specified torque.
Tightening torque:
Differential gear oil filler bolt:
23 Nm (2.3 m·kgf, 16 ft·lbf)
7. Check for oil leakage. If oil leakage is found, check
for the cause.
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