Guest Posted October 21, 2013 Share Posted October 21, 2013 Hi, I have a bit of a problem on my front brake for my cbr 125, one of my pistons is not moving atall there is no pressure in my leaver and it seamed like there is no break fluid getting through to the piston but I can see the fluid passing through as the other piston is out, Can any one help? hope I have explained my problem well enough. Quote Link to comment Share on other sites More sharing options...
Stu Posted October 21, 2013 Share Posted October 21, 2013 when you say the other piston is out do you mean its not in the caliper? or its in the caliper but moves when you operate the lever? Quote Link to comment Share on other sites More sharing options...
acting_strange Posted October 21, 2013 Share Posted October 21, 2013 If one piston is seized and the other free, there would be no pressure at the lever... Quote Link to comment Share on other sites More sharing options...
Tango Posted October 21, 2013 Share Posted October 21, 2013 Sounds like one of the pistons is stuck......could need a caliper strip and new seals fitted.....and clean the pistons if they aren't too bad...... Quote Link to comment Share on other sites More sharing options...
Guest Posted October 21, 2013 Share Posted October 21, 2013 Yeah one piston has come out of the caliper and the other does not move (can't get it out) ? Also there seems to be a problem with the break fluid getting through? Quote Link to comment Share on other sites More sharing options...
Stu Posted October 21, 2013 Share Posted October 21, 2013 if one piston is out of the caliper exposing the hole you will need to put it back in and bleed the caliper then once bled up you will need something in the caliper to stop the pistons popping out again while you pump the lever to free the other piston Quote Link to comment Share on other sites More sharing options...
Guest Posted October 21, 2013 Share Posted October 21, 2013 Ok I will try that tomorrow and get back to you sounds positive Quote Link to comment Share on other sites More sharing options...
Tango Posted October 21, 2013 Share Posted October 21, 2013 I usually use a large allen key laid in the disk slot on the caliper......that stops the pistons coming out completely......so when the free piston hits that it can't come out any further.....and the other piston can then move when you pull the brake lever......as long as you have some fluid in the brake system...... Quote Link to comment Share on other sites More sharing options...
Stu Posted October 21, 2013 Share Posted October 21, 2013 I use a spanner of a bit of straight bar to place in the caliper to stop the pistons popping all the way out Quote Link to comment Share on other sites More sharing options...
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