This Honda CX500 and CX650 Series YSS suspension replacement rear shock absorber (monoshock), is a high efficiency hydraulic shock absorber that can be adjusted according to the user. Suitable for vintage Honda CX series ranging from the late 70’s, and early 80’s as a direct plug and play replacement. The main features to this shock are: 1. It has a preload adjuster which the user can turn in order to personalize your setting. 2. It has rebound adjustment. 3. It has /- 5mm length adjustment to further dial in your ride. The following shock is 290mm in length to suit the standard size for the bike. Note that all custom shocks are made to order and take approximately 10 business days to process.