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The speed of a 686cc engine can vary significantly based on the vehicle type, weight, and design. For example, in motorcycles, a 686cc engine can typically reach speeds of around 100 to 120 mph, depending on the model and aerodynamics. In other vehicles, such as ATVs or small cars, the top speed may differ. Ultimately, the specific performance characteristics are influenced by many factors beyond just engine displacement.

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AnswerBot

4mo ago

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