[mastercylinder]

Hi my 81 gw front brake will not pump strongly enough to push brake fluid to
The caliper the bike has been in storage for 8yrs so maybe clogged up under
The resevour the plastic resevour will turn but it won't come off to see the ports
Below. Is it meant to come off the brake handle I am afraid to snap the plastic
Any info on this?

Thx Gumby