I have a 14 evk kz tonykart and while I was changing a axle I went and mistakenly pushed the pads into the calipers to allow room for the brake disc. (I did this because I accidentally pulled the brake on)
Now It won’t let me bleed them at all and every time I do bleed them the Pistons and pads only move slightly then go back in. The pistons are not far away from being flush with the caliper.
I plan on driving Saturday so I’m hoping I haven’t totally destroyed the rear brakes. Fronts are perfect but I can not get the pads on the rear anywhere near the disc.
Make sure the arm on the master cylinder returns ALL the way back against the body. Best way is to disconnect the balance bar at the MC arm, then bleed the brakes. I use a “Mighty Vac” attached by a piece of fuel line to the bleeder nipple.