The high mileage range for a motorcycle can vary depending on the type of motorcycle, its specific model, the owners level of care, and other factors. However, here are some general guidelines:

• Sport Bikes: The high mileage number for sport bikes will be on the low end, usually around 25,000 miles.
• Cruisers and Touring Bikes: These types of motorcycles typically become high mileage in the 40,000- to 50,000-mile range.
• Larger Motorcycles: Larger motorcycles, like Harley-Davidson, can usually take more miles, and the high mileage range is anywhere between 20,000 to 30,000 miles.
• Other Factors: The rarity, age, and price of a bike should all factor in what you consider "high mileage". Similarly, the type of riding and maintenance history can also affect the mileage of a motorcycle.

It's important to note that mileage is only part of the story with any vehicle because how it's been cared for counts a lot. Mileage is only one factor in determining a motorcycle's longevity, and it's not always a reliable indicator of a bike's condition.