Yamaha XZ550RJ 1982 Owner's Manual page 129

WARNING:
When draining or filling, take care not to
allow foreign material to enter the final
gear case. Do not to allow the gear oil to
contact the tire and wheel.
- 117 -
c. Reinstall and tighten the final gear case
drain plug. (See page 104 for torque
specifications.)
d. Fill the gear case to the specified level.
Oil capacity:
Final gear case:
0.2 L (0.18 Imp qt, 0.21 US qt)
Recommended oil: See page 53
e. Reinstall the filler cap securely.