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

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

Brake fade, spongy pedal feel, and fluid seepage don’t always signal the end of a master cylinder’s useful life. This V-Twin Mfg rebuild kit gives custom builders a cost-effective path back to full stopping authority — restoring the firm, predictable pedal response the cylinder delivered when new, without the expense of a complete replacement.

Key Features

• Restores full brake function to worn or leaking 5/8″ bore billet rear master cylinders without full assembly replacement
• Precision-fit components designed for V-Twin Mfg billet Kelsey Hayes inline (23-3003) and Wagner offset (23-3004) rear master cylinders
• Verify bore size and top cover dimensions against your cylinder before ordering — see Fitment tab for required measurements

Technical Specifications

• Bore Size: 5/8″ (0.625″)
• Top Cover Length: 3-1/8″ (3.125″)
• Top Cover Width: 1-7/16″ (1.4375″)
• Application: Rear master cylinder rebuild

Fitment Notes

• Designed for V-Twin Mfg billet rear master cylinders — verify compatibility with your specific cylinder before ordering
• Bore size must be 5/8″ and top cover must measure 3-1/8″ (3.125″) x 1-7/16″ (1.4375″) — verify before ordering
• No direct OEM year or model application; compatibility is determined by bore size and top cover dimensions
• Professional installation recommended if unfamiliar with hydraulic brake systems