It has been gettin worse all the time but over a couple of years. I took er out this morning and the brake lever will go all the way to the grip and really doesn't put much pressure on the brake. Now I really haven't looked into it to deeply but the reservoir if full. It may have air in the line I haven't bled it yet.

Is there a rebuild kit for the brake lever, plunger or master cylinder? What do ya think it the most likely cause of the weak brake?

thanks for the help

I think you know the answer , in the short term bleed it . For a proper service strip and replace seals and fluid , possibly replace brake hose with braided .

BobC

Yeah that is probably it. I guess I was wondering if there is a rebuild kit for the master cylinder or if the parts are just 0 rings I can get at the hardware store. If I need a kit where do I get it?

thanks

try these guys I get all my genuine spares from here

http://www.granbymotors.co.uk/spares.php?lnk=Yamaha