Front Master Cylinders
264 parts
Harley front master cylinders, rebuild kits and covers in 9/16", 5/8" and 11/16" bore. Doing the whole front brake? See brake lines, calipers, rotors and levers. Free US shipping over $100.
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V-Twin - 23-1719 - Handlebar Brake Master Cylinder Rebuild Kit - Fits 1972-1981 Harley-Davidson XL, FL, FX
V-Twin Mfg
$27.98Rebuild kit for handlebar brake master cylinder assemblies. Fits:XL 1972-1981FL 1972-1981FX 1972-1981Additional Information OEM No.4506$27.98 -
Out of stock
V-Twin - 23-1715 - Handlebar Master Cylinder Rebuild Kit
Edart
$24.83V-Twin - 23-1715 - Handlebar Master Cylinder Rebuild KitDescriptionRebuild kit rebuilds 11/16" bore front master cylinder for use on dual disc models. Fits:FXD 1996-2017FLT 1996-2007FLST 1996-2014XL...$24.83 -
V-Twin - 23-1657 - Brake Master Cylinder Cover Kit Black - Fits 2019-2020 Harley-Davidson FXST, FLST
V-Twin Mfg
$37.42Brake master cylinder cover kit features a black finish. Fits:FXST 2019-2020FLST 2019-2020Additional Information OEM No.41700479$37.42 -
V-Twin - 23-1055 - Handlebar Master Cylinder Assembly Chrome
Edart
$291.90V-Twin - 23-1055 - Handlebar Master Cylinder Assembly ChromeDescriptionAssembly features a 15mm bore and comes complete with internals and hand lever.Suggested to use with stock 1" bars. Fits:FLT...$291.90 -
V-Twin - 23-0969 - Handlebar Master Cylinder Cover Chrome
Edart
$64.04V-Twin - 23-0969 - Handlebar Master Cylinder Cover ChromeDescriptionSmooth style chrome cover for the handlebar brake master cylinder.Includes the screws and gasket. Fits:FLT 2008-UPAdditional...$64.04 -
V-Twin - 23-0944 - Handlebar Master Cylinder Cover Chrome
Edart
MSRP: $37.85$37.09V-Twin - 23-0944 - Handlebar Master Cylinder Cover ChromeDescriptionSmooth style chrome cover for the handlebar master cylinder comes with the top gasket, view plug and screw.. Fits:XL...MSRP: $37.85$37.09 -
V-Twin - 23-0825 - Handlebar Master Cylinder Piston Cup
Edart
MSRP: $9.86$9.76V-Twin - 23-0825 - Handlebar Master Cylinder Piston CupDescriptionMaster cylinder piston cup for rebuilding handlebar master cylinder. Fits:XL 1972-1981FL 1972-1981FX 1972-1981Additional InformationMSRP: $9.86$9.76 -
V-Twin - 23-0794 - Front Master Cylinder Cover Chrome
Edart
MSRP: $15.86$15.70V-Twin - 23-0794 - Front Master Cylinder Cover ChromeDescriptionFront master cylinder cover has a chrome finish with a black inlay of the classic V-Twin logo. Fits:FXST 1985-1995XL 1985-1995FXR...MSRP: $15.86$15.70 -
V-Twin - 23-0781 - Front Master Cylinder Cover Billet Milled
Edart
MSRP: $17.64$17.46V-Twin - 23-0781 - Front Master Cylinder Cover Billet MilledDescriptionBillet milled type cover for front master cylinder. Fits:FXST 1996-2005FLST 1996-2005XL 1996-2003FXD 1996-2005FLT...MSRP: $17.64$17.46 -
V-Twin - 23-0779 - Front Master Cylinder Cover Smooth Chrome
Edart
$29.80V-Twin - 23-0779 - Front Master Cylinder Cover Smooth ChromeDescriptionSmooth type chrome top cover for front master cylinder includes top gasket, screw, and view plug. Fits:FXST 1996-2005FLST...$29.80 -
V-Twin - 23-0590 - Handlebar Master Cylinder Spring Cup
Edart
MSRP: $15.86$15.70V-Twin - 23-0590 - Handlebar Master Cylinder Spring CupDescriptionSpring cup for handlebar master cylinder rebuild. Fits:XL 1972-1981FL 1972-1981FX 1972-1981Additional InformationMSRP: $15.86$15.70 -
V-Twin - 23-0288 - Handlebar Master Cylinder Rebuild Kit
Edart
MSRP: $22.30$20.85V-Twin - 23-0288 - Handlebar Master Cylinder Rebuild KitDescriptionRebuild kit contains necessary parts for rebuilding the handlebar master cylinder for single disc applications. Fits:XL...MSRP: $22.30$20.85 -
V-Twin - 2180-12 - Handlebar Master Cylinder Cover Screws
Colony Machine
MSRP: $23.86$22.31V-Twin - 2180-12 - Handlebar Master Cylinder Cover ScrewsDescriptionChrome handlebar and master cylinder cover screws are allen type. Fits:VRSC 2002-UPAdditional InformationMSRP: $23.86$22.31 -
V-Twin - 16-0613 - Brake Cylinder Hone Tool
Lisle Corp.
$46.28V-Twin - 16-0613 - Brake Cylinder Hone ToolDescriptionHone tool for brake cylinders. Fits:FL 1958-1972FX 1958-1972Additional Information$46.28 -
V-Twin - 15-0985 - Master Cylinder Gasket
Gary Bang
$35.41V-Twin - 15-0985 - Master Cylinder GasketDescriptionMaster cylinder front gasket. Fits:FL 2015-UPFXST 2015-2017Additional Information$35.41 -
V-Twin - 15-0373 - Master Cylinder Top Gasket
Gary Bang
MSRP: $13.64$13.50V-Twin - 15-0373 - Master Cylinder Top GasketDescriptionFront master cylinder and reservoir top gasket Fits:XL 2004-UPAdditional InformationMSRP: $13.64$13.50 -
V-Twin - 15-0250 - Master Cylinder Gasket
Gary Bang
MSRP: $15.14$14.98V-Twin - 15-0250 - Master Cylinder GasketDescriptionMaster cylinder front gasket Fits:FXST 1996-2005FLT 1996-2005FLST 1996-2005XL 1996-2003FXD 1996-2005Additional InformationMSRP: $15.14$14.98 -
V-Twin - 15-0242 - Master Cylinder Top Gasket
Gary Bang
MSRP: $10.56$10.45V-Twin - 15-0242 - Master Cylinder Top GasketDescriptionMaster cylinder top gasket Fits:FXST 1985-1995XL 1985-1995FXR 1985-1994FLST 1986-1995FXD 1991-1995FLT 1985-1995Additional InformationMSRP: $10.56$10.45 -
V-Twin - 15-0188 - Handlebar Master Cylinder Gasket
Gary Bang
$46.83V-Twin - 15-0188 - Handlebar Master Cylinder GasketDescriptionHandlebar master cylinder gasket Fits:XL 1972-1981FL 1972-1981FX 1972-1981Additional Information$46.83 -
V-Twin - 13-0152 - Handlebar Master Cylinder Plunger Spring
Eastern Motorcycle Parts
$24.18V-Twin - 13-0152 - Handlebar Master Cylinder Plunger SpringDescriptionPlunger spring for handlebar front master cylinder rebuild. Fits:XL 1972-1981FL 1972-1981FX 1972-1981Additional Information$24.18 -
V-Twin - 12-0984 - Front Brake Master Cylinder Retaining Ring
Eastern Motorcycle Parts
MSRP: $15.86$15.70V-Twin - 12-0984 - Front Brake Master Cylinder Retaining RingDescriptionRetaining ring for handlebar master cylinder rebuild kit. Fits:XL 1972-1981FX 1972-1981Additional InformationMSRP: $15.86$15.70 -
Drag Specialties - DS272171 - Switch - Brake Light - Chrome - '67-'74 XL
Drag Specialties
$20.28Drag Specialties - DS272171 - Switch - Brake Light - Chrome - '67-'74 XL Features Chrome replacement stoplight switches Also works great for custom applications Replacement Part for OEM...$20.28 -
Drag Specialties - 06170038 - Master Cylinder Rebuild Kit - Front - 5/8"
Drag Specialties
$50.83Drag Specialties - 06170038 - Master Cylinder Rebuild Kit - Front - 5/8"FeaturesMeet or exceed OEM specificationsSpecs$50.83 -
Drag Specialties - 06110050 - Master Cylinder - Chrome
Drag Specialties
$335.97Drag Specialties - 06110050 - Master Cylinder - Chrome Features Master cylinder accepts OEM-style rebuild kits and have clearance for all 1-1/4" handlebars Brake/clutch controls and switch...$335.97 -
Drag Specialties - 06101874 - Brake Master Cylinder - 15 mm - Black
Drag Specialties
$326.43Drag Specialties - 06101874 - Brake Master Cylinder - 15 mm - Black Features Include lever and clamp half Compatible with DOT 4 or 5 brake fluid Master cylinders work with all 1" or 1-1/4"...$326.43 -
Drag Specialties - 06101875 - Clutch Master Cylinder - 11/16" - Black
Drag Specialties
$326.43Drag Specialties - 06101875 - Clutch Master Cylinder - 11/16" - Black Features Includes lever and 10 mm banjo bolt Specs$326.43 -
Drag Specialties - 06101873 - Clutch Master Cylinder - 11/16" - Chrome
Drag Specialties
$331.73Drag Specialties - 06101873 - Clutch Master Cylinder - 11/16" - Chrome Features Includes lever and 10 mm banjo bolt Specs$331.73 -
Drag Specialties - 06101872 - Brake Master Cylinder - 15 mm - Chrome
Drag Specialties
$331.73Drag Specialties - 06101872 - Brake Master Cylinder - 15 mm - Chrome Features Include lever and clamp half Compatible with DOT 4 or 5 brake fluid Master cylinders work with all 1" or 1-1/4"...$331.73 -
Drag Specialties - 06101680 - Brake Master Cylinder - Softail - Chrome
Drag Specialties
$307.35Drag Specialties - 06101680 - Brake Master Cylinder - Softail - Chrome Features Chrome master cylinders with levers, clamp half and hardware Not for use with 1-1/4"/1-1/2" handlebars that are...$307.35 -
Drag Specialties - 06101681 - Brake Master Cylinder - Softail - Black
Drag Specialties
$351.87Drag Specialties - 06101681 - Brake Master Cylinder - Softail - Black Features Chrome master cylinders with levers, clamp half and hardware Not for use with 1-1/4"/1-1/2" handlebars that are not...$351.87 -
Drag Specialties - 06100806 - Brake Master Cylinder - ABS - Black
Drag Specialties
$316.89Drag Specialties - 06100806 - Brake Master Cylinder - ABS - Black Features Include lever and clamp half Compatible with DOT 4 or 5 brake fluid Master cylinders work with all 1" or 1-1/4"...$316.89 -
Drag Specialties - 06100804 - Brake Master Cylinder - Non-ABS - Black
Drag Specialties
$330.67Drag Specialties - 06100804 - Brake Master Cylinder - Non-ABS - Black Features Include lever and clamp half Compatible with DOT 4 or 5 brake fluid Master cylinders work with all 1" or 1-1/4"...$330.67 -
Drag Specialties - 06100585 - Master Cylinder - Chrome
Drag Specialties
$335.97Drag Specialties - 06100585 - Master Cylinder - Chrome Features Master cylinder accepts OEM-style rebuild kits and have clearance for all 1-1/4" handlebars Brake/clutch controls and switch...$335.97 -
Drag Specialties - 06100503 - Brake Master Cylinder - 3/4" - Dual Disc - Chrome
Drag Specialties
$312.65Drag Specialties - 06100503 - Brake Master Cylinder - 3/4" - Dual Disc - Chrome Features Include lever and clamp half Compatible with DOT 4 or 5 brake fluid Master cylinders work with all 1" or...$312.65 -
Performance Machine (Pm) - 0060-3505 - Master Cylinder Rebuild Kit - 9/16"
Performance Machine
$51.95Performance Machine (Pm) - 0060-3505 - Master Cylinder Rebuild Kit - 9/16"FeaturesEverything you need to rebuild one Performance Machine master cylinderReplacement master cylinder cover gasket...$51.95 -
Performance Machine (Pm) - 0060-1010-A - Master Cylinder Gasket - Top
Performance Machine
$9.95Performance Machine (Pm) - 0060-1010-A - Master Cylinder Gasket - TopFeaturesMade in the U.S.A.Performance Machine - The 50 Year HistorySpecs$9.95 -
Kodlin Usa - KUS25855 - Master Cylinder Cover - Black
Kodlin
$49.99Kodlin Usa - KUS25855 - Master Cylinder Cover - BlackFeaturesCNC machined from billet aluminumMatching hardware included allows for very easy installationReplaces the plastic stock coverSpecs$49.99 -
Hawg Halters - HBMA-CS21 - Billet Mechanical Brake Assembly - 9/16" - Chrome
Hawg Halters
$369.00Hawg Halters - HBMA-CS21 - Billet Mechanical Brake Assembly - 9/16" - ChromeFeaturesCompatible with most stock and aftermarket 4- and 6-piston calipersUtilize late-model OEM seals for great...$369.00 -
Hawg Halters - HBMA-AS21 - Billet Mechanical Brake Assembly - 9/16" - Black
Hawg Halters
$369.00Hawg Halters - HBMA-AS21 - Billet Mechanical Brake Assembly - 9/16" - BlackFeaturesCompatible with most stock and aftermarket 4- and 6-piston calipersUtilize late-model OEM seals for great...$369.00 -
Performance Machine (Pm) - 0062-2936-SMG - Brake Master Cylinder - Radial - 11/16" - Gold Ops
Performance Machine
$716.95Performance Machine (Pm) - 0062-2936-SMG - Brake Master Cylinder - Radial - 11/16" - Gold OpsFeaturesCNC-machined one-piece body with refined internals for optimal performanceRace driven master...$716.95
Harley Front Master Cylinders, Rebuild Kits and Covers
The master cylinder decides how your front brake feels at the lever. Replace a leaking one, rebuild the one you have, or clean up the bars with a new assembly. We stock front master cylinders from Drag Specialties, V-Twin Mfg, Performance Machine, Joker Machine, GMA and Hawg Halters.
Match the Bore to Your Brakes
- 9/16" bore: stock single disc front ends, '96–'17
- 11/16" bore: stock dual disc front ends, '96–'17
- 5/8" and other sizes: in the listings for custom setups
The wrong bore gives you a lever that's rock hard or one that comes back to the grip, so check it before you order.
What's Here
- Complete assemblies: chrome and black, stock style and cut down
- Rebuild kits: by year and bore
- Covers: stock replacement and custom
- Hand lever assemblies: old school master cylinder and lever sets for choppers and bobbers
Finish the front brake with brake lines, brake calipers, brake rotors and levers. For the back, see rear master cylinders, or shop all Harley brakes.
Not Sure It Fits?
Year, bore and single or dual disc all matter, and plenty of master cylinders look the same but aren't. If you can't tell whether something fits your bike, hit us up with your year and model and we'll check it before you order.