The clutch is hydraulically actuated. Squeezing the left hand lever causes the clutch master cylinder to apply pressure to the clutch actuation cylinder mounted in the transmission's right side cover. The actuation cylinder push rod extends and contacts the clutch release bearing to release the clutch.
Refer to Maintenance Scheduling → Regular Service Intervals → Regular Service Intervals: 2007 FXSTSSE . Check the fluid level as follows:
1. Stand the motorcycle upright (not leaning on the jiffy stand) on a level surface, turn handlebar so the top of the clutch master cylinder is level.
2. Clean all dirt and debris from the clutch master cylinder cover. Remove the two clutch master cylinder cover screws and remove the cover.
3. Verify the fluid level in the clutch master cylinder reservoir is at the FULL LEVEL mark at the top of the ledge on the rear inside wall of the reservoir. If the fluid level is low, add D.O.T. 4 BRAKE FLUID (Part No. 99953-99A) approved for clutch system use and available from your Harley-Davidson dealer.
NOTE
Do not overfill the clutch master cylinder reservoir. As the clutch friction discs wear, the piston in the clutch cylinder will force fluid back into the reservoir which could cause fluid overflow.
NOTICE
DOT 4 hydraulic brake fluid is used in the hydraulic clutch. Do not use other types of fluids as they are not compatible and could cause equipment damage. (00353b)
NOTICE
Do not allow dirt or debris to enter the master cylinder reservoir. Dirt or debris in the reservoir can cause improper operation and equipment damage. (00205c)
WARNING
Contact with DOT 4 brake fluid can have serious health effects. Failure to wear proper skin and eye protection could result in death or serious injury.
  • If inhaled: Keep calm, remove to fresh air, seek medical attention.
  • If on skin: Remove contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes. If irritation develops, seek medical attention.
  • If in eyes: Wash affected eyes for at least 15 minutes under running water with eye lids held open. If irritation develops, seek medical attention.
  • If swallowed: Rinse mouth and then drink plenty of water. Do not induce vomiting. Contact Poison Control. Immediate medical attention required.
  • See Safety Data Sheet (SDS) for more details available at sds.harley-davidson.com
(00240e)
NOTICE
DOT 4 brake fluid will damage painted and body panel surfaces it comes in contact with. Always use caution and protect surfaces from spills whenever brake work is performed. Failure to comply can result in cosmetic damage. (00239c)
4. Inspect the clutch master cylinder cover gasket for rips, cuts, cracks, or other signs of damage. Replace the gasket if necessary. Carefully place the cover and cover gasket on the master cylinder reservoir and secure with the two cover screws. Tighten the screws to 0.68–0.9 N·m (6–8 in-lbs).
NOTE
If the fluid level in the clutch master cylinder reservoir is correct but the clutch does not operate properly, refer to the service manual or see your Harley-Davidson dealer for service.