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The part number 42862-06B refers to a Harley-Davidson Front Brake Master Cylinder Rebuild Kit. This OEM replacement part is designed for handlebar-mounted master cylinders with a 15mm (11/16") bore diameter.

🛠️ Kit Function & Components

This repair kit allows you to rebuild the internals of a leaking, weeping, or spongy front brake master cylinder rather than replacing the entire assembly. According to product specifications from DMG Motorsports and Billetproof Design, the package generally includes:

Plunger / Piston assembly
Return spring
Cup seals and O-rings
Retention snap ring
Replacement washers and screws (where applicable)

🏍️ Model Fitment

The kit primarily fits dual-disc brake setups on the following Harley-Davidson motorcycles:

Touring Models: 2008 to present (including Street Glide, Electra Glide, Road Glide, and Road King)
Trike Models: 2009 to 2013 (and select newer applications)
V-Rod (VRSC) Models: 2006 to 2017