ADVrider

Go Back   ADVrider > Bikes > Old's Cool > Airheads
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 03-23-2008, 04:09 AM   #211
lesman
Live easy, Brake Hard
 
lesman's Avatar
 
Joined: Sep 2006
Location: Houston, Texas
Oddometer: 495
Solo:
Are the G/s and the GS calipers the same?





Les
__________________
Obsessive compulsiveness always trumps good sense.
lesman is offline   Reply With Quote
Old 03-23-2008, 06:44 AM   #212
XR200
n00b
 
Joined: Mar 2008
Oddometer: 6
I think the mounting holes are spaced differently, don't know about any other differences but they look very similar. Really they need to be compared side by side and I only have G/S caliper to hand.
XR200 is offline   Reply With Quote
Old 03-23-2008, 08:33 AM   #213
SOLO LOBO OP
airhead or nothing
 
SOLO LOBO's Avatar
 
Joined: Mar 2004
Location: Shoreline, WA
Oddometer: 8,615
Quote:
Originally Posted by XR200
I think the mounting holes are spaced differently, don't know about any other differences but they look very similar. Really they need to be compared side by side and I only have G/S caliper to hand.
Yes, the are different. The 4-piston K caliper will bolt right onto a R100GS after milling the ears... the G/S slider boss's are furthe appart then the GS
__________________
"punkrocks what it's all about" - J. Strummer



Quote:
Originally Posted by Stagehand
your bike is suitably dirty. Well done.
SOLO LOBO is offline   Reply With Quote
Old 03-27-2008, 08:12 PM   #214
x3300
geoff
 
Joined: Mar 2005
Location: San Jose, CA
Oddometer: 170
Ducati Disk

This write up describes my experience trying to enhance the front brake of my 1993 R100GSPD.

At first I looked at some aftermarket brake kits for the GS, but then decided a better solution was to fit a big disk from a bike that was easy to source. I did some research in the aftermarket brake parts catalogs, looking at disks for Honda, Yamaha, etc., and found that the standard Ducati 'snowflake' disk had the dimensions that I though would work with a simple adapter. I found there are many aftermarket parts available at a range of prices, but I chose the EBC model MD2003C as a kind of middle of the range part. There are just a few sizes that fit all the Ducati models, and here is what I found out about that snowflake disk:

Code:
  1995 Ducati 916 SP
  diameter    320
  thickness   5.0
  offset      9.65
  bore        64.0
  bolt circle 80.0
  bolt dia    8.5
  bolt count  6
This is what I measured the GS to be:

Code:
  bore        62.0
  bolt circle 79.0
  bolt dia    10.0
  bolt count  4
I made a drawing, bought some aluminum stock and had a machine shop make the adapter. The drawing and shop results can be seen in the photos. I needed to drill two additional bolt holes in the disk, enlarge two of the existing bolt holes, and buy four longer disk mounting bolts.

After getting the disk mounted on the wheel and the wheel back on the bike I setup the stock GS caliper on the disk at what I thought was a good position. I then used some thick card stock to make a caliper adapter template and then transferred that to a piece of aluminum flat stock with a permanent marking pen. Using just a hacksaw, file and hand drill, I could in short time have the adapter in the photos. I later bought a late model four piston BMW caliper, and that took very little time to adapt, but I would say the stock GS caliper gave sufficient performance, and seemed to have less drag. I've been thinking to re-try the old caliper again.

The caliper should be somewhat centered on the disk, otherwise new pads may not fit on the narrow side. I did my alignment by applying the brake to hold the caliper in position without the mounting bolts and then fitting some spacers of large nuts and washers of sufficient thickness so that they just slipped into position. The spacers I used can be seen in the photo of the back of the caliper.

At first I used the stock brake line with the stock caliper, but then I upgraded to a braided stainless line. I noticed a stiffer brake lever, and in general what I thought was a better brake feel. To make the line I bought some bulk Earl's Speed Flex -3 hose and the appropriate reusable hose ends. I found the stuff easy enough to work with. I bought some spare hose and olives so I can make future repairs. I found the olives are not reusable. I also carry a few olives in my tool kit when I go on tour, just in case. The hose comes either with or without a plastic covering. I read somewhere that dirt gets inside the braid of the uncoated hose and can cause premature wear, so I got the clear coated type. I think it looks better than the bare. I also put some heat-shrink tubing on the hose ends as seen in the photos to seal out grit. Here is a link to the speed-flex catalog:

http://www.holley.com/data/Catalogs/Brake%20Systems.pdf

I found the Earl's on-line supplier Fluid Systems Engineering (http://www.fluidsystemseng.com) and received very good service from them. Here is what I bought:

Code:
  600031 speed-flex -3 clear coat bulk hose
  600893 speed-seal -3 30 deg non-adjustable
  600593 speed-seal -3 30 deg adjustable
  699030 speed-seal -3 spare olives
The photos show the finish brake line after some use.

I now have about 30,000 miles on the big disk, and haven't had any real problems. The disk center carrier is made of aluminum, and is easier to bend than the original BMW disk. One time while in Mexico I had a tire patch installed and I noticed afterword that there was a lot of disk run-out. He must have bent the carrier while working on the wheel. I straightened it out by carefully hitting the center carrier with a few blocks of wood as I checked the run-out by how much drag there was. When at home I have a dial indicator I sometimes use to check or adjust the run-out. There are cheaper versions of the snowflake disk the have a steel center carrier, and I've thought that one of those might have been a good choice for its durability.

http://stuff.gotdns.org/bike/pd-front-brake/01-new-disk-package.jpg

http://stuff.gotdns.org/bike/pd-front-brake/02-disk-adapter-drawing.jpg

http://stuff.gotdns.org/bike/pd-front-brake/03-disk-adapter-inside.jpg

http://stuff.gotdns.org/bike/pd-front-brake/04-disk-adapter-outside.jpg

http://stuff.gotdns.org/bike/pd-front-brake/05-new-disk-mounted.jpg

http://stuff.gotdns.org/bike/pd-front-brake/06-side-view-disk.jpg

http://stuff.gotdns.org/bike/pd-front-brake/07-two-piston-adapter.jpg

http://stuff.gotdns.org/bike/pd-front-brake/08-two-piston-installed.jpg

http://stuff.gotdns.org/bike/pd-front-brake/09-four-piston-adapter.jpg

http://stuff.gotdns.org/bike/pd-front-brake/10-four-piston-adapter-fab.jpg

http://stuff.gotdns.org/bike/pd-front-brake/11-four-piston-adapter-installed.jpg

http://stuff.gotdns.org/bike/pd-front-brake/12-caliper-spacers.jpg

http://stuff.gotdns.org/bike/pd-front-brake/13-hose-parts.jpg

http://stuff.gotdns.org/bike/pd-front-brake/14-hose-end-upper.jpg

http://stuff.gotdns.org/bike/pd-front-brake/15-hose-end-lower.jpg

-x3300

x3300 screwed with this post 09-19-2010 at 09:36 AM Reason: Add image thumbnails.
x3300 is offline   Reply With Quote
Old 03-28-2008, 10:50 AM   #215
soyanarchisto
Beastly Adventurer
 
soyanarchisto's Avatar
 
Joined: Sep 2005
Location: Sunny PDX
Oddometer: 3,314
How about pimping your ride with these chrome calipers from a busa?

http://cgi.ebay.com/ebaymotors/HAYAB...3756.m20.l1116
soyanarchisto is offline   Reply With Quote
Old 03-29-2008, 08:30 AM   #216
lesman
Live easy, Brake Hard
 
lesman's Avatar
 
Joined: Sep 2006
Location: Houston, Texas
Oddometer: 495
Wow

I looked at the Ducati Rotor setup pictures.....wow







Les
__________________
Obsessive compulsiveness always trumps good sense.
lesman is offline   Reply With Quote
Old 04-03-2008, 09:53 AM   #217
HPMGuy
Gnarly Adventurer
 
Joined: Mar 2006
Location: Mid-California
Oddometer: 264
I received the adapters back from anodize yesterday, and they would be ready to ship if the vendor hadn't mixed up the bolt order. I should have the correct bolts sometime next week.

HPMGuy is offline   Reply With Quote
Old 04-03-2008, 10:33 AM   #218
soyanarchisto
Beastly Adventurer
 
soyanarchisto's Avatar
 
Joined: Sep 2005
Location: Sunny PDX
Oddometer: 3,314
I am still on the list for one set.
soyanarchisto is offline   Reply With Quote
Old 04-03-2008, 10:48 AM   #219
deadbird
Very Large Bird
 
deadbird's Avatar
 
Joined: Jun 2002
Location: santa cruz,ca
Oddometer: 149
Nice work Hpmguy.

Those look so SWEET!
Got my caliper, Nissin 4 pot.
Better get my brake line made up this next week.
Looking forward to better stopping.
Is it time to send the $ yet?
-Deadbird
deadbird is offline   Reply With Quote
Old 04-13-2008, 06:11 AM   #220
Renegade6
Studly Adventurer
 
Renegade6's Avatar
 
Joined: Feb 2004
Location: Ft. Riley, KS
Oddometer: 820
HPM Guy, any updates?
__________________
Brandon

1993 BMW R100GS
Renegade6 is offline   Reply With Quote
Old 04-13-2008, 08:54 AM   #221
HPMGuy
Gnarly Adventurer
 
Joined: Mar 2006
Location: Mid-California
Oddometer: 264
Quote:
Originally Posted by Renegade6
HPM Guy, any updates?
The adapters are all machined, anodized and ready to ship, I am just waiting on the arrival of the zinc plated bolts from the vendor. They screwed the order up the first time very bad, sending one bolt in the wrong length, and the other in the wrong pitch. I was promised delivery of the correct bolts this past week and they didn't show, so I am hoping for Monday. As soon as the bolts show up, I will post an update here, and will be ready to start shipping them out.
HPMGuy is offline   Reply With Quote
Old 04-13-2008, 02:46 PM   #222
Cigars&Scotch
My eyes are up here
 
Cigars&Scotch's Avatar
 
Joined: Aug 2005
Location: Fancy Pants of North Moran
Oddometer: 1,832
That looks a lot like the one that is on my bike done by the PO


__________________
Mike

"Why don't you buy some flea collars for your ankles so the ants wont climb up you leg and bite your candy ass!!!" Kennyanc 07 H.Springs

38 BMW R71 w/sidecar Kung Fu version
77 BMW R90S Huh ?
90 BMW R100GS/PD "At last!"

NRA Life Member, Trout Unlimited Life Member
Drink till I'm Drunk Life Member
Cigars&Scotch is online now   Reply With Quote
Old 04-14-2008, 01:29 PM   #223
HPMGuy
Gnarly Adventurer
 
Joined: Mar 2006
Location: Mid-California
Oddometer: 264
Update:

Just got off the phone with the vendor, and they are promising a Wednesday delivery for the fasteners.
HPMGuy is offline   Reply With Quote
Old 04-15-2008, 04:21 AM   #224
Beemerboff
Beastly Adventurer
 
Joined: May 2005
Oddometer: 2,267
Just got a pair of six piston Toxicos at the right price so your timing is right.

I have a recently fitted a SS brake line - anybody located a adaptor/ banjo which will let me use the existing line with the new caliper ?

We have to pay stupid prices here in Oz for lines , my local shop wants $200-to make a line to my pattern , so I am not just being a cheapskate!
__________________
Adelaide Hills, Australia. 93 R100 GS, 77 R75/7 ,70 BSA B44VS, , 86 R80 G/S PD, 95 BMW Funduro F650 ST
Beemerboff is offline   Reply With Quote
Old 04-15-2008, 04:31 AM   #225
johno
Beastly Adventurer
 
johno's Avatar
 
Joined: Dec 2007
Location: Mount Gambier, South Australia, Australia.
Oddometer: 2,912
Beemerboff, I got my line done for $98 by my local brake bloke.
And that was to suit the Nissin 4pot. 6pot the same banjo.
Your city blokes are ripping you off. You need to move to Mt Gambier.
Cheaper living

Should have my 6pots this week.
johno is online now   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

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 On

Forum Jump


Times are GMT -7.   It's 03:36 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014