• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

GS550 New Ebay master cylinder or other ones - help needed...

  • Thread starter Thread starter jarni
  • Start date Start date
J

jarni

Guest
Hello, I need to replace a leaking front master for my 78 GS550... I am looking on ebay for 5/8 master (China) since my bike has dual discs... but I would much rather buy a few years old original master from a street bike like Yamaha, Kawa, Honda, Suzuki,... does anybody know how large are the pistons in CBR600, gsxr, zzr,....
did anyone ever used such a master?
Best regards, J
 
I've got one from a GSXR on my (dual disc) CB650. Works a treat and handy on the ace bars as the angle of the dangle of the reservoir is adjustable.
 
The Kawasaki EX650 master is a reasonable option. Some years have the mirror boss. I put one on my KZ750 and it seems to work fine. Reservoir angles down a little is my only complaint.



 
Recommend stay away from cheap repos. Great product from usa-motorcycles-inc on ebay. Have bought two from him and they are very high qualitity and support is terrific if you need help. Quick response to any question. I had a problem with bleeding one of them and they took me thru all types of situations that might help. Turns out it was me, not the product. Can get all types of finish on master and lever. Based in Florida. Check them out.
 
I replaced my brakes on my 78 gs550 to twin disc and fitted a 1997 suzuki bandit 600 master cylinder(1200 is same) lots on flea bay

it has same mirror mount thread as original and cap seals better than old master cylinder, its marked 5/8 underneath, works great and has adjustable brake lever which is an improvement. also is shorter in length so fits better on handlebars better than possible dodgy Chinese in my view
 
Last edited:
I was using (and still have) Yamaha XJ900 master cylinders, which came in cheap as NOS a few years back. When looking for a more modern replacement, I happened upon the Deauville MC, which has a nice click-stop span-adjust lever as part of the package.
Frankly, I'd rather rebuild a decent OEM one than risk my neck with real cheap brake parts of dodgy origin and unknown quality control. I'll happily cheap out on some other things, but not that.
 
Back
Top