Kastar Neck Bearing Adjustment Tool 449 The neck bearing adjustment is usually checked at the following service intervals: 1,000 miles, 5,000 miles, 15,000 miles, 25,000 miles or annually If adjustment is necessary, this tool is designed perfect to fit the application Tapered end allows easy access to the neck bearing adjusting star on Harley-Davidson front ends Screwdriver-style handle offers a comfortable grip