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What weight of oil is recommended for a 1981 Yamaha XS400 Special?
Wiki User
∙ 13y ago
I own a Chilton's Motorcycle Repair Manual (1959-1981) and in the Yamaha XS360-400 section is states "When the average air temperature is above 5 degrees Celsius (41 degrees Fahrenheit), use Yamalube 4-stroke oil, or SAE 20W-40, service rating SE or SF. When air temperature is consistently below 15 degrees Celsius (59 degrees Fahrenheit), use SAE 10W-30, service rating SE or SF."
Wiki User
∙ 13y ago
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