To measure the rear shock length on a Harley-Davidson Sportster, you can follow these steps:
Park the motorcycle on a level surface: Ensure that the bike is stable and upright, either by using a motorcycle stand or having someone hold it upright.
Locate the rear shocks: The rear shocks on a Sportster are typically positioned on either side of the rear wheel, connecting the swingarm to the frame. They are easily visible and accessible from the side of the bike.
Measure the distance between the mounting points: Using a measuring tape or a ruler, measure the distance between the upper and lower mounting points of one shock. The upper mounting point is usually located near the seat area, while the lower mounting point is attached to the swingarm.
Take the measurement: Measure from the center of the upper mounting bolt to the center of the lower mounting bolt. Ensure that the measuring tape or ruler is straight and parallel to the ground while taking the measurement. Note down the length in inches or millimeters.
Repeat for the other shock: It's important to measure both rear shocks individually, as they may have different lengths due to wear or adjustments.
Compare measurements: Once you have measured both shocks, compare the lengths to ensure they are the same. If there is a significant difference between the measurements, it may indicate an issue with the suspension or the shocks themselves.
Remember that rear shock length can be adjusted on some Sportster models. If you are planning to replace the shocks or make any adjustments, consult your owner's manual or seek advice from a qualified technician to determine the appropriate shock length and any specific recommendations for your motorcycle model.