The average cost of liability coverage on an auto/motorcycle policy can vary significantly depending on various factors. These factors include the location where the vehicle is registered, the driver's age and driving record, the type of vehicle, the coverage limits chosen, and the insurance company itself. Additionally, state minimum requirements for liability coverage can also influence the cost.
Please note that this is just a general estimate, and actual costs can be higher or lower depending on the factors mentioned earlier.
It's always best to contact insurance providers and obtain quotes specific to your circumstances to get a more accurate idea of the cost of liability coverage for your auto/motorcycle policy.