Some countries require all motorcycles to have brake wear indicators on the rear drum to comply with the relevant Construction and Use regulations. Particularly Australia. As the MZ (TS and ETZ) don't have these marks as standard a little home modification is required. This can be done and set up with the wheel off the bike. With a set of new shoes and actuator arm correctly set up, adjust the brakes so the shoes are just rubbing. Remove wheel and brake backplate [1]
Move the arm manually so the shoes are binding, where the dots line up with a point on the backplate this is your min mark (i.e. new shoes) With the brake plate out of the drum, but resting on it move the arm by hand so the friction material "overlaps" the drum lining but the shoes' backing are still inside the circumference of the drum (this simulates worn out friction material). Where the dots line up with a point on the backplate this is your max mark (i.e. worn out shoes). You could use letter punches to make these marks, and make it look a bit professional! |
Put a mark on the brake cam spindle [3] and a mark on the arm [2] itself
so the marks line up, this is shown as two white dots on the diagram
(incidentally the diagram shows the shoes half worn). These two dots are to save
setting it all up again should you have to remove the arm for any reason. Use a
centre punch to make the dots.