This genuine factory rear brake master cylinder assembly includes the integrated fluid reservoir, piston linkage rod, rubber dust boot, banjo bolt, and mounting hardware. It features a rectangular black reservoir body with a built-in plunger and pushrod system designed for forward-mounted foot brake pedal configurations. Technical Specifications Brand: Harley-Davidson OEM Part Number: 42474-90B Interchange Numbers: 42474-90, 42474-90A Casting Number: 42474-90 Type: Rear Foot Brake Master Cylinder Assembly Finish: Black Reservoir / Raw Steel Linkage Fitment & Compatibility Designed for Harley-Davidson Dyna models from 1991 to 2005. It does not fit 2006–2017 Dyna models using OEM 42474-06. Compatible Models Dyna Low Rider FXDL / FXDLI: 1993–2005 Dyna Wide Glide FXDWG / FXDWGI: 1993–2005 Dyna Super Glide FXD / FXDI: 1995–2005 Dyna Super Glide Sport FXDX / FXDXI: 1999–2005 Dyna T-Sport FXDXT: 2001–2003 Dyna Convertible FXDS-CONV: 1994–2000 Dyna Daytona / Sturgis FXDB: 1991–1992
Please verify compatibility with your specific motorcycle model before purchasing.
Cleaning Status
partially_cleaned
Cleaning Notes
Used degreaser
Worldwide shipping available
Express shipping available at checkout
Estimated delivery: 2-5 business days
All items are carefully packaged for safe transit
Items can be insured — contact us for more information
30-day return policy on most items
Items must be in original condition and packaging
Contact support for return authorization
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Yes, all parts with OEM numbers are genuine manufacturer parts. Check the specifications tab for the OEM number.
We offer a 30-day return policy. Items must be in original condition. See the Shipping tab for complete details.
Yes, we ship to most countries worldwide. Shipping costs and delivery times vary by location.
Parts are sold separately. We recommend professional installation for safety and warranty purposes.
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