KYMCO AK 550 Service Manual page 39

2.Periodic Maintenance AK 550
Draining
The brake bleeding process is the same for the front and rear brakes.
Remove the two master cylinder cover screws with a #2 Phillips head screwdriver.
Remove the master cylinder cover, plastic piece and rubber accordion diaphragm.
Pour out any remaining brake fluid.
Clean and inspect the rubber diaphragm for tears or other damage. Replace as
necessary.
Pull off the rubber cap over the bleeder valve and crack open the bleeder valve
on the brake caliper using an 8 mm wrench. This valve is usually very tight so use
a box end wrench or a 6 point socket and ratchet to prevent rounding off the head.
Snug the bleeder valve back down.
Open the valve and remove the old brake fluid with a Mighty -Vac or a similar
device.
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