Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Hendi Kaf, in Cambodia

I haven't been everywhere...
but it's on my list!


Photo by Hendi Kaf,
in Cambodia



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 22 Mar 2008
Registered Users
New on the HUBB
 
Join Date: Mar 2008
Location: texas
Posts: 1
front brake calipers

yamaha yzf600 rebuilt front calipers and reinstalled with new pads..........can't seem to bleed air from system............have let gravity fill...........but still no pressure to bleed..........please help.
Reply With Quote
  #2  
Old 22 Mar 2008
Registered Users
HUBB regular
 
Join Date: Dec 2007
Location: Christchurch,New Zealand
Posts: 95
Suck it out.
Seriously...Try to use a clear hose so you can see where the fluid is,suck it till it starts getting near the end and if you've got a spare person,get them to start pulling the lever.
I have done this a few times and it hasn't done me any harm
Reply With Quote
  #3  
Old 22 Mar 2008
Registered Users
Veteran HUBBer
 
Join Date: Apr 2006
Location: Staffordshire. uk
Posts: 766
I haven't tried this but people have had success with tying a cable tie around the front brake lever to hold it on and leaving it for a day. Wrap some cardboard around the grip first to stop the cable tie digging in to the rubber. I imagine it forces the fluid into all the nooks and crannies inside the caliper and gets rid of the air which travels back to the highest point, the master cylinder. This only works once you get some pressure at the lever. If you've got non you can buy kits with a pump to force it in. Google brake bleed kit.
Reply With Quote
  #4  
Old 22 Mar 2008
Contributing Member
Veteran HUBBer
 
Join Date: Feb 2004
Location: Edinburgh
Posts: 762
check the method you're using is correct. if there is zero resistance in the lever, then have you rebuilt the calipers correctly and used new piston seals? are the seals between the caliper halves correctly installed? If in doubt, just split the caliper (I assume they are of the spilt-able type) and clean everything up.

for the bleeding, are you closing the bleed valve when releasing the brake lever? a few pumps on the lever, open bleed valve, close bleed valve, release lever, repeat. Is the hose connected to the bleed valve in liquid (brake fluid) so as to prevent air being sucked back into the caliper end of the brake system?

when you've tried bleeding the system, does the fluid in the reservoir disappear? If so, then just keep topping it up, and keep going. eventually the system will fill up and fluid will start coming out at the caliper end bleed valve.
Reply With Quote
  #5  
Old 23 Mar 2008
Registered Users
Veteran HUBBer
 
Join Date: Feb 2002
Posts: 212
Try a syringe

HI Redfish,

In the past I've had to use a syringe connected to the brake caliper bleed nipple by a length of clear tube and sucked the brake fluid down from the mastyer cylinder by pulling the plunger back with the nipple open a quarter of a turn. I then close the nipple, seperate the syringe and pipe, pust the syringe plunger back in, reattach the pipe and repeat. You need to keep an eye on the fluid level in the master cylinder and not let it get too low.

I've heard of people filling the syringe with brake fluid and pushing it into the brake caliper, but I have never tried this as I am nervious of fluid spilling out of the master cylinder and damaging paintwork etc.

Brake fluid is very corrosive stuff, I certainly wouldnt consider sucking it through by mouth and hoping my reflexis were quick enough to stop me getting a mouthful of it!

Good luck

Mark
Reply With Quote
  #6  
Old 23 Mar 2008
mattcbf600's Avatar
Gold Member
Veteran HUBBer
 
Join Date: Aug 2006
Location: London, England
Posts: 706
The old tried and tested method of manual bleeding (pressured way is much faster but you really need to know what you're doing) is to open the nipple and squeeze the brake lever then close the nipple before releasing the brake - repeat - alot - slowley

You'll think you've got pressure about three times before it actually builds properly and I tend to go through a whole can of DOT4 before I achieve a clean system.

This page is quite handy and is the method I use

HEL Brake Lines - Brake Doctor

m
__________________
------------------
http://thelondonbiker.com/blog

Watch some of my camp cooking videos

AIM: mattcashmore
SKYPE: matthewcashmore
MSN: matthew@matthewcashmore.com
Reply With Quote
  #7  
Old 24 Mar 2008
Registered Users
HUBB regular
 
Join Date: Jan 2006
Location: Nicholasville,Ky.U.S.A.
Posts: 93
Question Get the air out

I use a syringe and clear hose method differently than these other folks. I take a plastic syringe and form a lip on the tip by heating a piece of metal hot enough to melt the plastic.Just barley though, you don't want to go to far up. When you have your little edge slip a piece of tubing over it and secure with a small tie wrap.I use battery vent tube for a tight fit,to help stretch it over the nipple put it over some needle nose pliers and spread them.
Put the other end on the brake bleeder nipple and secure with a tie wrap. Hang the syringe upright with a piece of wire. Fill the syringe with brake fluid. loosen bleeder nipple, insert plunger into syringe and push fluid into the caliper.
This always works for me. It is a lot easier to get the air to go up the hose than down to the caliper. Have the resiviour open and keep an eye on the level. You may have to suck some fluid out to keep it from running over.
I have another syringe to pull the excess out of the resiviour. In a pinch you could soak it up with paper towels.
Good luck, K.B.
__________________
ride,smile,repeat as nessasary
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Anybody uprated their front 3AJ brake? GeoffE Yamaha Tech 9 21 Jun 2007 16:06
XTZ750 Front Brake Cheekster Yamaha Tech 6 4 Oct 2006 16:09
WANTED: brake Calipers for AT electric_monk TRAVEL Equipment for Sale / Wanted 0 17 Sep 2006 22:25
R100 GS Front Brake Julio BMW Tech 4 12 Sep 2002 22:20
KTM front brake squeal wastegate KTM Tech 5 2 Dec 2001 22:03

 
 

Announcements

Thinking about traveling? Not sure about the whole thing? Watch the HU Achievable Dream Video Trailers and then get ALL the information you need to get inspired and learn how to travel anywhere in the world!

Have YOU ever wondered who has ridden around the world? We did too - and now here's the list of Circumnavigators!
Check it out now
, and add your information if we didn't find you.

Next HU Eventscalendar

25 years of HU Events
Be sure to join us for this huge milestone!

ALL Dates subject to change.

2025 Confirmed Events:

Virginia: April 24-27
Queensland is back! May 2-5
Ecuador June 13-15
Germany Summer: May 29-June 1
CanWest: July 10-13
Switzerland: Date TBC
Ecuador: Date TBC
Romania: Date TBC
Austria: Sept. 11-14
California: September 18-21
France: September 19-21
Germany Autumn: Oct 30-Nov 2

Add yourself to the Updates List for each event!

Questions about an event? Ask here

See all event details

 
World's most listened to Adventure Motorbike Show!
Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...

Adventurous Bikers – We've got all your Hygiene & Protection needs SORTED! Powdered Hair & Body Wash, Moisturising Cream Insect Repellent, and Moisturising Cream Sunscreen SPF50. ESSENTIAL | CONVENIENT | FUNCTIONAL.

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

"Ultimate global guide for red-blooded bikers planning overseas exploration. Covers choice & preparation of best bike, shipping overseas, baggage design, riding techniques, travel health, visas, documentation, safety and useful addresses." Recommended. (Grant)



Ripcord Rescue Travel Insurance.

Ripcord Rescue Travel Insurance™ combines into a single integrated program the best evacuation and rescue with the premier travel insurance coverages designed for adventurers.

Led by special operations veterans, Stanford Medicine affiliated physicians, paramedics and other travel experts, Ripcord is perfect for adventure seekers, climbers, skiers, sports enthusiasts, hunters, international travelers, humanitarian efforts, expeditions and more.

Ripcord travel protection is now available for ALL nationalities, and travel is covered on motorcycles of all sizes!


 

What others say about HU...

"This site is the BIBLE for international bike travelers." Greg, Australia

"Thank you! The web site, The travels, The insight, The inspiration, Everything, just thanks." Colin, UK

"My friend and I are planning a trip from Singapore to England... We found (the HU) site invaluable as an aid to planning and have based a lot of our purchases (bikes, riding gear, etc.) on what we have learned from this site." Phil, Australia

"I for one always had an adventurous spirit, but you and Susan lit the fire for my trip and I'll be forever grateful for what you two do to inspire others to just do it." Brent, USA

"Your website is a mecca of valuable information and the (video) series is informative, entertaining, and inspiring!" Jennifer, Canada

"Your worldwide organisation and events are the Go To places to for all serious touring and aspiring touring bikers." Trevor, South Africa

"This is the answer to all my questions." Haydn, Australia

"Keep going the excellent work you are doing for Horizons Unlimited - I love it!" Thomas, Germany

Lots more comments here!



Five books by Graham Field!

Diaries of a compulsive traveller
by Graham Field
Book, eBook, Audiobook

"A compelling, honest, inspiring and entertaining writing style with a built-in feel-good factor" Get them NOW from the authors' website and Amazon.com, Amazon.ca, Amazon.co.uk.



Back Road Map Books and Backroad GPS Maps for all of Canada - a must have!

New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80G/S.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events all over the world with the help of volunteers; we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, or ask questions on the HUBB. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.




All times are GMT +1. The time now is 12:18.