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Try bleeding it, if that doesnt work you will need a new master cylinder/ master cylinder rebuild kit, brake seals or brake line, depending on whats leaking. The master cylinder and brake line can come off ANY bike as long as they are the right length (brake line) or fit on the handle bars (master cylinder)
If the lever has to be pumped then there is air in the system, use a brake bleeding kit that forces fluid in or draws it outOr try pushing the caliper pistons right back in, holding them there & bleeding Alternatively remove calipers & tap in different positions
Hi, this means that the pistons of your front brake are not recovering properly.
If you feel confortabe with that job, you must remove brake caliper , then remove cilinders and all the protection rubber and sealing rings. Give the cilinders a good cleaning (check for scrathes or rust) replace sealers and reasemble all. Change the brake fluid and purge the circuit properly
I expect it has air in the slave cylinder. Bleeding the brakes will get rid of the air. Check if the brakes are spongy. If they aren't, make sure the spring plates behind the pads are fitted. They ensure the pads are pushed back into the calliper a little bit, reducing heat and wear.
try using a line locker close to master cyclinder ,lever should go rock hard if it has no air in system,work line locker down lines to see if lever stays hard. also check the lever travel to make sure that lever is pushing on master cyclinder plunger as a lot of after market levers dont have correct casting and have to travel in a long way before brakes work even when system is bled. also check to make sure calliper carriers are not bent and pads not sitting square on rotors. hope this helps
There is no adjustment, but it sounds like the calipers need to be cleaned out. Remove the caliper and push the pistons out either with brake pressure from the master cylinder, or use air pressure from a compressor. If you use a compressor use a low pressure and keep your fingers out of the way. Once the pistons are out remove the seals from the caliper, and clean the area in the bore behind the seal, there will likely be some white crud behind the seal, and this holds pressure on the pistons. DO NOT USE any petroleum based cleaners on any brake system parts, it will cause the seals to swell and then they will be useless, use only denatured alcohol, or brake cleaner. After cleaning re assemble the caliper, wet all the parts with brake fluid to ease piston installation, reinstall on the bike and bleed the brakes, it should cure the problem.
Its the rear brake master cylinder. I myself have had this problem and all my mates with hyosungs have had this problem.
There is a seal kit that honda makes that fits the master cylinder for re-sealing, other than that get a new one.
Does all the usual tricks include wrapping a thick bungee cord around the brake lever and leaving it overnight? That should force any residual air bubbles to the top of the system where the master cylinder should replace them with fluid.
If that does not work try installing some new bleed screws, even speed bleeders.