Sym Allo 50 Owner's Manual page 17

（Replenishment of front wheel brake fluid）
1.Loosen the screws and remove the master cylinder cover.
2.Wipe clean foreign materials, dirt around the reservoir, being
careful not to let foreign materials fall into the reservoir.
3. Remove the diaphragm plate and the diaphragm.
4. Add brake fluid to upper lever.
5.Install the diaphragm plate and the diaphragm, and install the
master cylinder cover.
6.please note the diaphragm direction, and do not let foreign
materials fall into the reservoir. And tighten the master
cylinder cover securely.
CAUTION:
 TO prevent chemical reaction, please do not use brake fluids other than those recommended.
 Do not fill above the upper limit when adding brake fluid and avoid dropping on painting or
plastic components to prevent damage.
Master cylinder
cover
Diaphragm
16
Screw
Upper
Brake fluid