How Do I Determine the Rake on the Front of a Harley or Custom Chopper?
- 1). Identify the center of the neck line. The neck line is the part of the motorcycle frame that the front forks connect to. Take the end of a plumb line without the weight and place the string against the center of the neckline.
- 2). Use a protractor to measure the angle between the vertical plumb line and the front forks.
- 3). Add the rake angle of the bore holes in the triple trees to your rake measurement for bikes that have triple trees attached to them. For example, if you have 5-degree triple trees and a 26-degree basic rake angle, the total rake angle would be 31 degrees.