Harley Davidson Maintenance — Rear Air Shock Adjustment

It is desirable to have the proper amount of air in your
Harley-Davidson motorcycle’s rear air shocks. This allows for rider
comfort; it can also will prevent the rear fender from bottoming out on
the rear wheel.

Equipment Required

You will need an air pump to adjust the shocks. You can purchase
this specialty pump, which has a monitoring gauge, from Harley-Davidson
at an authorized dealership. Or you can purchase an after-market
version from an auto parts store. Caution: Do not use a
gas-station air pump to put air into your Harley-Davidson shock
absorbers. Doing so can blow out the shocks’ seals and lines.

Procedure

1. Determine the amount of air required in the rear shocks. For a solo
   rider, this is between 10 and 15 pounds (your comfort level may be
   higher or lower). For two-up riding, including luggage and carry-alongs
   such as food, camera, or extra clothing, the pressure may be 20-25
   lbs., again determined by you and your fellow rider’s comfort level. Caution: Do not put more than 35 lbs. into the shock absorber.
2. Remove saddle bag (if so equipped) to access shocks. Remove nuts
   and washers, and place in saddle bag to avoid losing. Set aside.
3. Unscrew protective cap on shock and attach pump to air inlet.
4. Note present amount of air in shock.
5. Use pump handle to pump more air into shock. If shock has too much air, use release valve on pump to remove air from shock.
6. Remove pump.
7. Re-attach saddle bag.
8. Repeat for other side.

To test the system for leaks, leave the air pump attached to the
shock for 20 or 30 minutes. If the reading on the pump has remained
constant during this time, the system does not leak.

Having the proper air pressure in your Harley-Davidson motorcycle’s
rear shocks can be the determining factor as to whether or not you have
a comfortable trip. Remember, the more air, the stiffer the ride.