ADVrider

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-24-2005, 06:06 PM   #1
clintnz OP
Trans-Global Chook Chaser
 
clintnz's Avatar
 
Joined: May 2004
Location: Rotoiti, New Zealand
Oddometer: 3,388
Air in 640 Front Brake, Again!!

Went to pull the 640 ('03 Enduro) out of the shed this morning, (she's been there for 3 weeks all lonely while I've been holidaying in Europe with a newer model ) & discovered a very mushy front brake, When I had this a while back & I checked all the brake fittings & bled the system which fixed it, now it's happened again. Does anybody have any clues on where the air might be getting in? Do I need new seals somewhere?

Cheers
Clint
__________________
'03 KTM 640 LC4 Enduro

The wilderness, the desert - why are they not crowded
.................................................. .....with pilgrims?
clintnz is offline   Reply With Quote
Old 10-24-2005, 06:34 PM   #2
creeper
Still alive...
 
creeper's Avatar
 
Joined: Dec 2003
Location: Puget Sound
Oddometer: 10,718
Quote:
Originally Posted by clintnz
Went to pull the 640 ('03 Enduro) out of the shed this morning, (she's been there for 3 weeks all lonely while I've been holidaying in Europe with a newer model ) & discovered a very mushy front brake, When I had this a while back & I checked all the brake fittings & bled the system which fixed it, now it's happened again. Does anybody have any clues on where the air might be getting in? Do I need new seals somewhere?

Cheers
Clint
You might want to completely flush the system with fresh dot 4 or 5.1 Clint... prolly has water in it.
__________________
So... how's tricks?
creeper is offline   Reply With Quote
Old 10-24-2005, 07:02 PM   #3
clintnz OP
Trans-Global Chook Chaser
 
clintnz's Avatar
 
Joined: May 2004
Location: Rotoiti, New Zealand
Oddometer: 3,388
Did a full flush last time, the fluid was clean, but there was definitely air in there.

Cheers
Clint
__________________
'03 KTM 640 LC4 Enduro

The wilderness, the desert - why are they not crowded
.................................................. .....with pilgrims?
clintnz is offline   Reply With Quote
Old 10-24-2005, 07:49 PM   #4
creeper
Still alive...
 
creeper's Avatar
 
Joined: Dec 2003
Location: Puget Sound
Oddometer: 10,718
Quote:
Originally Posted by clintnz
Did a full flush last time, the fluid was clean, but there was definitely air in there.

Cheers
Clint
Strange... fluid is hydroscopic... but very little rubber in the system exposed to atmosphere, no rubber in the hose at all. Front side of the caliper piston O-rings... backside of the master cylinder O-ring… that's about it.

Oh well... it only takes a little bit.
__________________
So... how's tricks?
creeper is offline   Reply With Quote
Old 10-24-2005, 08:14 PM   #5
yater
Beastly Adventurer
 
yater's Avatar
 
Joined: Oct 2004
Location: Texas
Oddometer: 8,517
back bleed your system. I haven't seen anything on backbleeding on this site but it's BY FAR the easiest way to ensure there is no air in the line. Simply fill from the bottom nipple...takes 5 minutes and works everytime. If you don't find any info on parts needed when you search, pm me and I'll start a "how to" thread
yater is offline   Reply With Quote
Old 10-24-2005, 08:56 PM   #6
clintnz OP
Trans-Global Chook Chaser
 
clintnz's Avatar
 
Joined: May 2004
Location: Rotoiti, New Zealand
Oddometer: 3,388
Cheers for that, but it's not the bleeding that is the problem, when I bled it last time the lever came up nice & hard, & it was good for the couple of months & several thousand km's until now. I'm really looking for any ideas on how the bike is getting air in the brake system while sitting in the shed??

Cheers
Clint
__________________
'03 KTM 640 LC4 Enduro

The wilderness, the desert - why are they not crowded
.................................................. .....with pilgrims?
clintnz is offline   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 02:02 AM.


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