buy a replacement w/bearing. remove rear brake drum (remove wheel and w/bearing centre nut 32 or 30 mm socket reqd).remove w/bearing from brake drum usually with a press your local garage should do this for you ,there might be a circlip to remove also.refit brake drum,the w/bearing centre nut needs to be done up tight and the outer part of the nut needs to be punched into the groove of the thread(this needs to be done, loss of rear wheel may otherwise occur)
phlipflop, December 2006