Question When riding on a slippery surface, you should: Answers Increase your speed. Use only the rear brake. Avoid making sudden moves. Explanation Avoid making sudden moves when riding on a slippery surface. Any sudden change in speed or direction can cause a skid. Operate as smoothly as possible when speeding up, shifting gears, turning, or braking. This questions appears in the following tests: South Dakota Motorcycle Practice Test 5