Drum brake adjustment front

The front brake lever should be free to move between 1 and 2.5mm at the fulcrum end, or 8 to 15mm at the ball end. The lever adjuster can be used to provide free movement as necessary, no matter what type of drum brake is fitted. When adjustment is completed, the brake shoes should be just 'off' rubbing on the drums. If the lever cannot provide the freeplay necessary then you should slacken the adjustment-out at the lever and tackle the other end of the cable.

Take up some of the adjustment on the cable at the brake plate end, and then go back to the lever end for a final tuning.

The early Laverda brake takes up its adjustment on the end of the cable while the Grimeca and late Laverda type take up adjustment on the cable outer, on the brake plate. The early Laverda drum also has a little adjuster for centralising the shoe — this is fitted close by the end of the cable, on the lever arm. Do not alter this stop screw and do not alter the adjuster rods visible on the brake plate on late Laverda drums only. These arms co-ordinate the movement of the two brake shoes (being twin leading shoes). These arms are adjusted at the factory and there is normally no good reason for altering them. If, however, they get out of adjustment, proceeds as follows. This method goes for Laverda rear drum brakes too.

Lift the relevant wheel clear of the ground and disconnect the connecting arm from the longest brake arm at the clevis pin. Then adjust the connecting arm nut until the shoe activated by the shortest brake arm just touches the drum. Then adjust the longest arm's pivot screw (hexagonal bolt head) until the clevis pin just slips in at the point the other shoe (activated by the longest arm) touches the drum. Refit the clevis and replace its split pin. Now adjust the connecting arm's nut until both shoes are just clear of the drum. Then adjust the brake cable. Make sure hand lever travel is reasonable.

Check the adjustment of the front brake light switch — it's adjustable at the lever.

Motorcycle Front Drum Brake Adjustment

The Grimeca front brake adjustment on the cable

The Grimeca front brake adjustment on the balance between both shoes

The Grimeca front brake adjustment on the cable

The Grimeca front brake adjustment on the balance between both shoes

Laverda's early front drum, cable and shoe stop adjustment (Twin)

Drum Brake Adjustment Lever

The Laverda front drum brake. Follow the text for shoe Grimeca's rear brake cable adjustment adjustment

Motorcycle Drum Brake Adjustment

Laverda's own front brake cable adjustment

The Laverda front drum brake. Follow the text for shoe Grimeca's rear brake cable adjustment adjustment

Drum brake adjustment — rear

Adjustment is a very similar operation for the rear drum brakes although obviously this time it is foot operated. The Grimeca and late Laverda rear drum has its adjustment on the cable outer, on the brake plate. There is also a brake pedal stop screw which simply positions the pedal. Once again ac ust the pedal/cable to suit your own preference — fast or slow brake — but always try to achieve a just before rubbing shoe to drum fit. The early Laverda drum uses its adjustment at the cable end and the stop screw is on the brake plate. Use the same methods as previously described. Check the adjustment of the brake stop light to make sure it is not over stretched.

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