OK so firstly bike is a 2000 kawasaki klr250, I have never ridden it except couple test runs up back alley bought it in pieces and been putting it back together. This is the first bike I have worked on but am pretty mechanically minded. Been trying to bleed the front brakes (rear is drum) had them kind of ok but then had to reroute cable and not been able to get them even remotely ok since. Have installed new brake pads. Master cylinder sucks down rubber seal or whatever it is underneath lid if fluid gets too low in it, I am guessing that is what its meant to do. Caliper isnt siezed as it does move though it is stiff, should it be easily moved or not. Have brakes working ok if at standstill or slow speeds but any speed and they not overly effective. Would like this issue solved asap as its pretty much the only thing keeping me sending it off for a roadworthy.