Typically if it says 4-stroke it means motorcycle/powersports oil. Honda 4-stroke is used for honda motorcycles and powersports and is made for use with wet-clutches. If it just says motor oil it's typically for a car. Amsoil synthetic was only about 8 bucks a quart for me, how much oil does your bike take? You can try normal oil, but i have a feeling you will feel your clutch start to slip.
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