Master Cylinder Reservoir Cap Plastic O-Ring, This master cylinder reservoir cap plastic o-ring is a quality replacement component for repair, restoration, and regular maintenance. As the internal seals age and swell, the lever goes spongy or slowly sinks to the bar and braking fades.

• Restores firm lever feel and hydraulic pressure
• Cures a spongy or sinking lever
• Confirm bore size against your original

Fits

• 1988-1990 Honda GL1500
• 1990 Honda GL1500SE
• 2001-2005 Honda GL1800A
• 2001-2008 Honda GL1800