Master cylinder cover help!

Reply Subscribe

Thread Tools

Search this Thread

Jan 13, 2011 | 12:33 PM

#11

JRK5892

Banned

Joined: Mar 2007

Posts: 19,481

Likes: 25

From: Chicago suburbs (Elgin/Schaumburg)

get a new gasket and just snug it up.. that is all you need to do

Jan 13, 2011 | 01:26 PM

#12

FXD2003Rider

Administrator Emeritus

Joined: Feb 2007

Posts: 9,213

Likes: 970

From: Harmelen (The Netherlands, Europe)

New gasket is p/n 45483-05

Jan 13, 2011 | 02:51 PM

#13

HATZO1

Tourer

Joined: Sep 2007

Posts: 479

Likes: 1

From: Sharpsburg,GA

Quote:

Originally Posted by reded

Mine started leaking last year. I tried everything and couldn't get it to stop. Now the fluid has eaten all of the paint off around the outside edge of the cap, looks like $hit. I'm gonna get a new cap and gasket and hope that fixes it.

Same here.

Jan 13, 2011 | 09:30 PM

#14

coop creek

Road Captain

Joined: Sep 2007

Posts: 626

Likes: 125

From: Reading, PA

The "new and improved" gasket is thicker/taller for a better seal. I actually replaced the entire master cylinder assembly which includes cap, gasket, resevoir and brake lever for $118. It was not very hard to do. The banjo bolt is a weird part, 12 points or something, so I had to buy a wrench to fit it, otherwise, fairly straight-forward.

Jan 13, 2011 | 09:38 PM

#15

Rajin Cajun

Cruiser

Joined: Aug 2010

Posts: 137

Likes: 0

From: Louisiana

i would get new one you prob pinched gasket

Jan 13, 2011 | 09:59 PM

#16

Knucklehead15

Advanced

Joined: Dec 2009

Posts: 66

Likes: 0

From: PA

New lid with gasket cost me just over $20. HD knows about the problem and the new replacement is "better". Some were covered under warranty mine was not. It was a service bulletin.

Jan 14, 2011 | 01:07 AM

#17

FXD2003Rider

Administrator Emeritus

Joined: Feb 2007

Posts: 9,213

Likes: 970

From: Harmelen (The Netherlands, Europe)

Quote:

Originally Posted by coop creek

...The banjo bolt is a weird part, 12 points or something, so I had to buy a wrench to fit it, otherwise, fairly straight-forward...

Front brake master cylinder fitting single disk p/n 41739-84A has a 11mm 12-point socket; more m-sizes to be found over here:

***dyna models metric sizes database***

Multiple options:

11mm 12 point socket:

10 & 11 mm 12 point ring wrench:

11 mm 12 point combination wrench:

10 & 11 mm 12 point tube wrench:

These are the ones I have in my toolbox:

Last edited by FXD2003Rider; Jan 14, 2011 at 01:25 PM.

Jan 14, 2011 | 03:10 AM

#18

Topspin

Road Warrior

Joined: Oct 2007

Posts: 1,643

Likes: 3

From: Palm Beach

I bought a brand new Master Cylinder on eBay for $20. Couldn't stand the look of the crinkled paint on the old one. Oh... and no more leak! Same cover and gasket too.

HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

7 Times Harley-Davidson Chucked Tradition Out the Window

Verdad Gallardo

7 Surprising Harley-Davidson Products that Are Not Motorcycles

Verdad Gallardo

8 Best Harley-Davidson Motorcycles Ever

Pouria Savadkouei

10 Worst Harley-Davidson Motorcycles Ever

Pouria Savadkouei

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Verdad Gallardo

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Verdad Gallardo

Harley-Davidson Reveals Super Cool Cafe Racer Concept

Verdad Gallardo

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Verdad Gallardo

10 Motorcycles You Should Never Buy

Joe Kucinski

10 Things Harley-Davidson Needs to Fix in 2026

Verdad Gallardo

Jan 14, 2011 | 04:47 AM

#19

Poisond 08 Fatbob

Tourer

Joined: Jul 2008

Posts: 467

Likes: 1

From: East of Cincinnati

The paint on the lid of my '08' fatbob is bubbled up from the fluid leaking. I've never had it off. Waranty is up so when I replace mine this year it'll come out of my pocket.