Yamaha XZ550RJ 1982 Owner's Manual page 145

Recommended coolant:
High quality ethylene glycol
anti-freeze containing anti-corrosion
for aluminum engine inhibitors
Coolant and water mixed ratio:
50%/50%
Total amount:
2.3 L (2.0 Imp qt, 2.4 US qt)
Reservoir tank capacity:
0.35 L (0.3 Imp qt, 0.4 US qt)
From "LOW" to "FULL" level:
0.25 L (0.2 Imp qt, 0.3 US qt)
CAUTION:
Hard water or salt water is harmful to the
engine parts. You may use boiled water
or distilled water, if you can't get soft
water.
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