• 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
    WR = 2st Enduro & CR = 2st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

125-200cc How to tell if brake master cylinder seal is a goner

Take the master cylinder off and put your thumb over the hole and see if it pumps, You can get a longer stroke with it off and it may be all it needs to get it working again after its all connected back up - Yes I know it sounds dumb but its worked for me loads of times.
 
Wat does the bigger nut under the bleed nipple do? Does that bleed the caliper also?

Edit it's jus the banjo
 
The cylinder isn't scored or something? Have you taken the caliper apart to make sure there's no damage to the piston and seals? Gotta be something more than the master cylinder at this point.
 
Right then get a pair of grips if you havnt got a proper hose clamp and clamp the hose as close to the cylinder as possible. Now has it got pedal pressure ? If so you know its not the master and its down the line at the caliper end.
 
The cylinder isn't scored or something? Have you taken the caliper apart to make sure there's no damage to the piston and seals? Gotta be something more than the master cylinder at this point.
That's wat I'm thinkin. Can't get piston out it's fully recessed. Maybe comp air down inlet hole
 
Right then get a pair of grips if you havnt got a proper hose clamp and clamp the hose as close to the cylinder as possible. Now has it got pedal pressure ? If so you know its not the master and its down the line at the caliper end.
Won't this wreck the line bein braided?
 
Visually check inside cylinder tape some very fine sand paper to a drill bit and give it a quick hone, take caliper and master cylinder off bike reverse bleed by clamping piston with g clamp and then bleed as normal with mc lower than caliper and brake line straight make sure the mc is returning fully, still say air in system but trapped in caliper.
 
Sounds like a seized piston..put a screw driver so the thing doesn't fly out and pop them out with compressed air.
View: https://www.youtube.com/watch?v=1jp2OCidBV4
Don't ever do this! If you get a stuck piston that all of the sudden lets go you will have broken fingers. Instead place a block of wood to catch the piston. If you don't use a block of wood the piston can come out of there so fast that it will dent an ruin the piston.
 
Cant believe that work takes preference over brakes/bikes down under mate ! Gotta get yer priorities right :lol:
 
not to hijack but I have been having brake issues with my TE310 as well. rebuilt the master and still having issues. it will build pressure and then the pressure will drop off like a safe. Loosing pressure like that would make me think that I have a leak or a broken line but I cannot find one anywhere. My master cylinder might just be screwed. I looked inside and I didn't really see any major scoring or anything...
 
if you are not losing fluid (visually from fittings or non visually -slave piston seal) but you are losing pressure for sure its your master. You need to disassemble it again and do a very close inspection of the cylinder. I have had at least one fail. The fail mode is that the hard plating starts to chip, delaminate and flake off the inside walls of the cylinder.....and there is not a seal made that can deal with that. My bet is that is what you have going on. A bright light and even magnifying glass are good inspection tools. Good news is last time I did one it was available. I got mine (Magura) from Factory Pro Supermoto in San Diego they had 10.5 and 9.5 master cylinders I just went with the OEM 9.5mm (it is cast or marked right into the assembly)

http://www.factoryproracing.com/Contact_Us.html
 
if you are not losing fluid (visually from fittings or non visually -slave piston seal) but you are losing pressure for sure its your master. You need to disassemble it again and do a very close inspection of the cylinder. I have had at least one fail. The fail mode is that the hard plating starts to chip, delaminate and flake off the inside walls of the cylinder.....and there is not a seal made that can deal with that. My bet is that is what you have going on. A bright light and even magnifying glass are good inspection tools. Good news is last time I did one it was available. I got mine (Magura) from Factory Pro Supermoto in San Diego they had 10.5 and 9.5 master cylinders I just went with the OEM 9.5mm (it is cast or marked right into the assembly)

http://www.factoryproracing.com/Contact_Us.html

Thanks...yeah that was where I have been leaning towards. I am going to check out the calipers first...pull the piston out and check the square seal.

Worst case, I found a 10mm brembo from this place for about $150 which is about $30 less than if i were to buy it from husky.

http://www.cyclesrus.net/new-brembo-right-side-front-brake-master-cylinder-husqvarna/
 
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