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1989 Yamaha Moto4 350cc - Can I Safely Switch to Synthetic Oil?

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My father just drained the oil for his 1989 Yamaha Moto-4 350cc ATV and was curious if it would be safe to replace it with synthetic oil. Any help would be appreciated.

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sure as long as it's atv oil. keep checking oil level before every ride. some peoples machines have started burning oil with synthetic oil and some have no problems at all. good luck

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I agree, I think you need to make use it's ATV oi with all the additives. Synthetic doesn't break down as fast.

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