Is there a rebuild kit available for the front master cylinder? There looks to be a piston and some o-rings in the parts book but its listed as a Pin. When you pull the lever it grabs and then keeps going to the handle bar it won't hold pressure and I see no fluid leaking any where. Bill
I had the same problem with my 125 and purchased the master cylinder rebuild kit and the caliper rebuild kit from partspitstop.com. I replaced the O-rings in the caliper first and that solved the problem, never rebuilt the master. There are two o-rings on each piston and you basically pump the lever until both pistons come out of the caliper at the same time, replace the o-rings, put the pistons back in the caliper then re-bleed the brake. In my case, the o-rings got worn by dirt/sand and started to let air into the system. I believe most KTM's EXCs use the same brembo brakes as yours with 28mm pistons. Here is a link to the caliper parts for a 2003 250exc, hope this helps: http://www.partspitstop.com/pages/o..._2003/Brake_Caliper_Front/1M03060010/03060055
Thanks, I'll bleed it out and see if the problem still is there, then order the parts.How's the 167 running I missed the gathering part 2.
You could also try the trick of tying the brake lever all the way in and leave it overnight. This helps short term. I really like the 167, it's perfect for how I like to ride.
