V-Twin Mfg 5/8 Bore Rear Master Cylinder Rebuild Kit for Kelsey Hayes and Wagner Style

V-Twin Mfg 5/8 Bore Rear Master Cylinder Rebuild Kit for Kelsey Hayes and Wagner Style

A worn master cylinder does not have to mean a trip to the parts counter for a full replacement. This rebuild kit restores the hydraulic integrity of the cylinder back to proper operating condition — bringing back the firm, predictable pedal response that makes a correctly functioning vintage brake system worth maintaining.

Key Features

• Restores 5/8″ bore master cylinders to proper hydraulic function without full unit replacement
• Compatible with both Kelsey Hayes inline and Wagner offset style aftermarket master cylinders
• Fits the range of 5/8″ bore reproduction cylinders used in custom Harley-Davidson builds and restorations
• Verify the top cover dimensions match your cylinder before ordering

Technical Specifications

• Bore Size: 5/8″
• Compatible Styles: Kelsey Hayes inline, Wagner offset
• Top Cover Dimensions: 3-9/16″ (3.5625″) x 1-5/16″ (1.3125″)
• Application: Rear master cylinder rebuild

Fitment Notes

• Compatible with aftermarket Kelsey Hayes and Wagner style rear master cylinders with a 5/8″ bore
• Top cover must measure 3-9/16″ (3.5625″) x 1-5/16″ (1.3125″) — verify against your cylinder before ordering
• Not a model-specific fitment — compatibility is determined by bore size and top cover dimensions of your master cylinder