The MBP retaining system was designed to extend valve adjustment intervals by using a superior design to retain the closer shim on the valve stem.
- MBP Retainers are compatible with our Closer Shims and Ducati OEM Closer Shims
- MBP Retainers are available for 7 mm and 8 mm valve stems
- 8 MBP retainers are needed for 2V bikes
- 16 MBP retainers are needed for 4V bikes
- Modified Opener shims are required when MBP Retainers are used on all 4V bikes.