Special Tools
DescriptionPart NumberQty.
AIR SUSPENSION PUMP AND GAUGE
HD-34633
1

All models feature air-adjustable rear suspension except FLHX and FLTRX international models. Air pressure in the rear shock absorbers may be adjusted to suit load requirements, riding style and personal comfort.
NOTICE
Do not exceed maximum air pressure for suspension. Air components fill rapidly. Therefore, use low air line pressure. Failure to do so can result in possible damage to components. (00165b)
WARNING
Use caution when bleeding air from the suspension. Moisture combined with lubricant may leak onto the rear wheel, tire and/or brake components and adversely affect traction, which could result in death or serious injury. (00084a)
  1. Remove the left saddlebag, if present.
  2. See Figure 1. Remove the cap from the air valve located behind the shock absorber on the left side of the vehicle.
    3. NOTE
    • Always add 21–35 kPa (3–5 psi) to the existing pressure before releasing air from the system to prevent oil for exiting the air valve. NEVER exceed 345 kPa (50 psi).
    • Do not exceed maximum GVWR or GAWR.
  3. Refer to Table 1 and Table 2. Attach AIR SUSPENSION PUMP AND GAUGE (Part Number:HD-34633) to the air valve. Fill or release air from the shock absorber to the pressure specified for your model motorcycle and load.
    4. NOTE
    The specified pressures are recommended starting points. Adjust pressure to suit load conditions, riding style and comfort desired. Less pressure does not necessarily result in a softer ride. Using pressures outside the recommended loading range will result in a reduction of available suspension travel and reduced rider comfort.
  4. Install cap on air valve and install left saddlebag, if removed.
Figure 1. Rear Suspension Air Valve
Table 1. Recommended Suspension Air Pressure: Models Without Tour-Pak
SHOCK LOAD
TOTAL WEIGHT
PRESSURE
PSI
kPa
Solo rider
up to 68 kg (150 lb)
0
0
68–91 kg (150–200 lb)
0-10
0-69
91–113 kg (200–250 lb)
10-20
69-138
113–136 kg (250–300 lb)
20-30
138-206
136 kg (300 lb) to maximum added weight allowed*
30-50
206-345
Solo rider with capacity luggage of 18 kg (40 lb)
up to 68 kg (150 lb)
10-20
69-138
68–91 kg (150–200 lb)
20-30
138-206
91–113 kg (200–250 lb)
30-40
206-276
113–136 kg (250–300 lb)
40-50
276-345
136 kg (300 lb) to maximum added weight allowed*
50
345
Rider plus passenger
Any weight up to maximum added weight allowed*
40-50
276-345
Maximum loaded vehicle
Maximum added weight allowed*
50
345
If an optional Tour-Pak is installed, add 34–69 kPa (5–10 psi) to shock pressure.
Do not exceed 345 kPa (50 psi) suspension pressure.
*Refer to Specifications → Specifications → Weights: FLHR, FLHRC, FLTRX, FLHX for maximum added weight allowed on the motorcycle.
Table 2. Recommended Suspension Air Pressure: Models With Tour-Pak
SHOCK LOAD
TOTAL WEIGHT
PRESSURE
PSI
kPa
Solo rider
up to 68 kg (150 lb)
5-10
34-69
68–91 kg (150–200 lb)
10-20
69-138
91–113 kg (200–250 lb)
20-30
138-206
113–136 kg (250–300 lb)
30-40
206-276
136 kg (300 lb) to maximum added weight allowed*
40-50
276-345
Solo rider with capacity luggage of 32 kg (70 lb)
up to 68 kg (150 lb)
25-30
172-206
68–91 kg (150–200 lb)
30-40
206-276
91–113 kg (200–250 lb)
40-50
276-345
113 kg (250 lb) to maximum added weight allowed*
50
345
Rider plus passenger
Any weight up to maximum added weight allowed*
50
345
Maximum loaded vehicle
Maximum added weight allowed*
50
345
Do not exceed 345 kPa (50 psi) suspension pressure.
*Refer to Specifications → Specifications → Weights: FLHTC, FLHTCU, FLHTK, FLTRU for maximum added weight allowed on the motorcycle.