News:

This forum is run by RPM and donations from members.

It is the donations of the members that help offset the operating cost of the forum. The secondary benefit of being a contributing member is the ability to save big during RPM Holiday sales. For more information please check out this link: Membership has its privileges 

Thank you for your support of the all mighty FJ.

Main Menu

lost clutch.bubbles in master cylinder

Started by skik, October 07, 2014, 02:41:56 PM

Previous topic - Next topic
Print
Go Down Pages1
User actions

skik

October 07, 2014, 02:41:56 PM
went to move bike in garage and noticed i had no clutch.opened lid on master cylinder to check fluid.there was fluid but bubbles when pulling lever.i cant see any leaks.i tried bleeding.still no clutch,still bubbles.where would be the first place i should look at?slave,master,line?

JoBrCo

#1
October 07, 2014, 04:30:53 PM
Probably the master, if you continuously get bubbles with repeatedly squeezing the lever.  Either rebuilding it by honing the cylinder, and replacement of the piston and seals, or replacement of the entire lever/reservoir assembly, shall be required.  But I'd inspect the slave as well, as they are notoriously unreliable, and it may also need replacing. It sounds like the master though, as I just did mine and that was indeed the symptom.

Good Luck!


FJ Forever!   :drinks:


JoBrCo 
1985 FJ1100NC



"To 'truly' see the man in the mirror, the only way for the image to be clear, as the man then 'truly' grows" --JoBrCo--

'I only know that I know nothing' --Socrates--

skik

#2
October 08, 2014, 08:16:18 AM
Quote from: JoBrCo on October 07, 2014, 04:30:53 PM
Probably the master, if you continuously get bubbles with repeatedly squeezing the lever.  Either rebuilding it by honing the cylinder, and replacement of the piston and seals, or replacement of the entire lever/reservoir assembly, shall be required.  But I'd inspect the slave as well, as they are notoriously unreliable, and it may also need replacing. It sounds like the master though, as I just did mine and that was indeed the symptom.

Good Luck!


FJ Forever!   :drinks:


JoBrCo 
thanks jobrco.was thinking master.ordered kits for master and slave.might as well do both while im at it.

~JM~

#3
October 09, 2014, 09:18:11 AM
Just for the heck of it. Try zip-tying the clutch lever half of the way to the handlebar & leave it overnight to a couple of days. Sometimes this will allow the bubbles to rise to the surface.

Good luck

rktmanfj

#4
October 09, 2014, 10:07:46 AM

:morning1: It's a whole lot more likely to be the slave than the master, IMO.

As old as the FJ is now, a new braided line makes a world of difference, as well.

Randy T
Indy

Blessed be the LORD my strength, which teacheth my hands to war, and my fingers to fight.
Psalms 144:1

'89 FJ1200
'90 FJ1200
'78 XT500
'88 XT350

Dan Filetti

#5
October 09, 2014, 10:45:32 AM
Quote from: not a lib on October 09, 2014, 10:07:46 AM

:morning1: It's a whole lot more likely to be the slave than the master, IMO.

As old as the FJ is now, a new braided line makes a world of difference, as well.



Knowing nothing more than what you said, I'd guess it was the slave.  Master fail on the FJ, but the slaves fail more often.  Look for peeling paint down by the slave, its often a sign that it a) has once leaked or b) is currently leaking.  The good news is that slave rebuild kits can be had from RPM for cheap money.

Dan
Live hardy, or go home. 

~JM~

#6
October 13, 2014, 10:09:30 AM
When I bought my FJ the slave was bad. I ordered a new slave & a braided stainless steel line. I had a lot of trouble bleeding the system until I tried tying the clutch lever halfway back & leaving it overnight.

Here are a couple of options:
http://rpmracingca.com/proddetail.asp?prod=Clutch%3Aslavecyl&cat=26
http://rpmracingca.com/proddetail.asp?prod=Clutch%3AS%2FK

Good luck
Print
Go Up Pages1
User actions