I’ve overhauled, rebuilt and installed a lot of hydraulic brakes on every vehicle imaginable, the ones on your bike ( if hydraulic) are just a smaller version of what is on your car, minus a bleed nipple. Here is how to bleed these . Fill the mineral oil up at the master cylinder part ( by the lever) put the screw back in. Squeeze the brake lever and hold or wrap a elastic cord to keep pressure on the lever. Loosen the screw ( slightly) on the caliper. If you see slight/ tiny bubbles with fluid trying to escape past the screw then your on the right track. Close the screw on the caliper. Remove the screw at the lever to add more mineral oil, repete. If you still can’t get a hard lever, I’d remove the caliper, stick something about the same thickness as the disc brake rotor between and tape in place so it can’t fall out. Elevate the caliper above the lever/ master cylinder. Squeeze lever and hold, loosen the caliper bleed screw only slightly. At this point you should see bubbles trying to escape past the caliper bleed screw threads. Close the caliper screw. Lower the caliper, fill master cylinder w/ mineral oil, reinstall fill screw. Again elevate the caliper. Squeeze lever and hold. Bleed caliper screw again. Repete untill lever is hard. You could leave the caliper elevated overnight with lever tied w/ elastic cord to keep pressure on it. Loosen bleed screw ( slightly) and you should see bubbles. Not responsible if you mess something up. If your not sure of your capabilities, take your bike to a shop.
