How do you check oil on 1990 suzuki 160 quad runner?

To check the oil on a 1990 Suzuki 160 QuadRunner, first ensure the quad is on level ground and the engine is off. Locate the oil dipstick, which is typically found near the engine, and remove it. Wipe the dipstick clean, reinsert it without screwing it in, and then pull it out again to check the oil level; it should be within the marked range. If the oil level is low, add the appropriate type of oil as specified in the owner's manual.