XS650.com
Forum Search: Advanced

Go Back   XS650 Forum > General Discussion > The Garage
Register Forum FAQ XS650 Tech Members List Search Today's Posts Mark Forums Read Donate

Welcome to XS650.com!
XS650.com is dedicated to the Yamaha XS650 twin motorcycles and to the people who love to ride, restore, and customize them. As a guest you can view the forum and photo galleries full of xs650 choppers, bobbers, trackers, cafe racers, and restorations, but you have to register before you can post or view attachments. Itís free and only takes a minute. Proceed to registration. (This notice will go away once you log in)

Notices

The Garage Motorcycle Related Discussion (Yamaha XS650, other makes and models, and anything else motorcycle related including tools and gear)

Reply
 
Thread Tools Search this Thread
Old 02-11-2011, 02:18 PM   #1
scott s
XS650 Addict
 
scott s's Avatar
 
Join Date: Feb 2010
Location: Rock Hill, SC
Posts: 496
Default Better rear brake shoes (drum brake)

Is anyone having issues with Mikes rear shoes?

We have them on three different bikes and they just won't grab. The worn out sets we took off of two bikes were able to lock the rear wheel up, while the new shoes seem too soft or slick or something.

We sanded the drum with 800 grit, the shoes are installed and adjusted correctly, etc.

Where can I get some shoes that have more "bite" in them?
scott s is offline   Reply With Quote
Old 02-11-2011, 03:54 PM   #2
jamesgs4
fuck this, let's ride!
 
jamesgs4's Avatar
 
Join Date: Feb 2010
Location: denver
Posts: 2,038
Default Re: Better rear brake shoes (drum brake)

Did you try the yamaha dealer?
jamesgs4 is offline   Reply With Quote
Old 02-11-2011, 03:59 PM   #3
xjwmx
XS650 Guru
 
xjwmx's Avatar
 
Join Date: Feb 2010
Location: U.S.A.
Posts: 4,678
Default Re: Better rear brake shoes (drum brake)

I got them from a dealer because it was kind of an emergency...They were ebc brand, and work well.

Note: the rears will lock a lot more readily if you're applying the front as well;; just to make sure you're comparing old and new rear shoes the same way....


Last edited by xjwmx; 02-11-2011 at 04:19 PM.



xjwmx is offline   Reply With Quote
Old 02-11-2011, 04:14 PM   #4
roadcall
XS650 Addict
 
roadcall's Avatar
 
Join Date: May 2010
Location: SW VA, USA
Posts: 108
Default Re: Better rear brake shoes (drum brake)

I prefer "DP Brakes". A lot of people have not heard of them. They are supplied by Parts Unlimited. Your local dealer that buys from PU can order them. I always had a lot of brake squeal from EBC. But a lot of people have not. DP has a higher carbon content, and never any squeal. Just MY opinion.
roadcall is offline   Reply With Quote
Old 02-11-2011, 05:43 PM   #5
jackstraw650
XS650 Addict
 
jackstraw650's Avatar
 
Join Date: Nov 2010
Location: Barboursville, VA
Posts: 110
Default Re: Better rear brake shoes (drum brake)

The fact that the old shoes continue to work well and the new one doesn't leads me to think that [1]somehow some grease or oil got on the shoe surface or [2] the shoes got "glazed" right after install, or [3] they were defective from the beginning. One thing you could try is sand the surface of the shoes with medium grade sandpaper....just enough to remove the top layer of friction material. Also, check to see their isn't excessive lube on the shoe cam or anywhere else that could possibly get into the shoes when hot.
Good luck, guys!


...........just like a Willys in four wheel drive!

1979 XS650 Standard
1998 Yamaha FJ1200
2006 BMW K1200S Lead Sled
jackstraw650 is offline   Reply With Quote
Old 02-11-2011, 06:03 PM   #6
tonyc
XS650 Guru
 
tonyc's Avatar
 
Join Date: Dec 2009
Location: Bakersfield, CA
Posts: 1,156
Default Re: Better rear brake shoes (drum brake)

Mike Morris 650 Central can get you quality brakes. Tony C


1978 Stahdard
1976 standard
1963 BSA A-65
tonyc is offline   Reply With Quote
Old 02-11-2011, 06:30 PM   #7
gggGary
Old guy, NO expert.
 
gggGary's Avatar
 
Join Date: Mar 2010
Location: Baraboo, WI, USA
Posts: 10,166
Default Re: Better rear brake shoes (drum brake)

are the shoes contacting all across their arc? or just a t the ends or middle? Detail oriented shops will turn new shoes to match the drum diameter.

From: http://www.vintagebrake.com/tips.htm

DRUM BRAKE TIPS
Carefully inspect drum surface for grooves (obvious), crown (not so obvious), out of round and high-low spots (dial indicator). Crown often occurs with riveted linings. High-low spots commonly result when relacing hubs. There is no substitute for a freshly turned drum for premium friction materials to bed-in against. It's like putting a new piston in an old bore-never as good as with a fresh bore and hone. And you should inspect drum surface with the same critical eye. Tolerance: .002 to .004”" any dimension. Up to .010” out-of-round may be tolerated.

If you are re-riveting new linings yourself, DO NOT drill out the rivets. Chisel off the peened end and drive the rivet out.

Materials currently available far exceed those previously available. Reline your shoes with a current premium compound

Keep in mind the low unit pressures required for mechanically operated drum brakes. Most linings require the higher unit pressures available hydraulically.

Very few modern materials are compatible with pressed steel drums.

Lay back leading edge of leading shoes in 1/2 inch increments to minimize initial "bite" if brake is too "grabby", especially when hot.

The expanded metal used to cover scoops is typically 15% to 23% open area. Replace them with stainless steel screens with 50% to 60% open area, tripling air flow.

Use sealed wheel bearings --grease vapor can contaminate linings. Once contaminated, they never recover.

.Lubricate backing plate components SPARINGLY with a 500F. + degree grease, such as Sta-Lube Sta-Plex Extreme Pressure, available at NAPA. Liberally lube parts and assemble. Disassemble and carefully remove all excess grease.

Check to see how far the backplate extends into the drum. Too far in and the sides of the shoes drag on the hub, creating excessive heat. Epoxy a shim to the inside of the backplate. Not far enough, and a ridge forms where there is no contact. Bend backplate or remove material to correct.

Worn pivot shafts cause uneven actuation. Rebush if necessary.

If a stay is used, make sure it does not cock the backplate.

Always apply brake when tightening axle.

If you want to arc the linings yourself, and have access to a lathe, first mount the relined shoes on the backing plate. Turn on the lathe (300-350rpm) to .020" under drum I.D. in .010" cuts.



If loud pipes save lives...
Think what proper riding gear and training could do!
gggGary is offline   Reply With Quote
Reply


Similar Threads (based on keywords)
Thread Thread Starter Forum Replies Last Post
Rear brake drum to disc conversion? Bonez The Garage 10 07-07-2011 09:47 PM
Wanted - Rear Drum Brake Lever Hardware alfredo Classifieds 3 02-06-2011 05:07 AM
For Sale - Rear mag with drum brake Motrhedd Classifieds 4 01-01-2011 05:15 AM
Rear drum brake linkage? maxpower3 The Garage 23 12-03-2010 09:34 AM
Wanted - Rear (spoked) drum-brake XS1961 Classifieds 0 06-14-2010 01:31 PM

Bookmarks
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 08:28 AM.