How to Bleed BrakesUpdated 4 months ago

If your brakes have become squishy and unresponsive this may be due to air in the brake lines. To resolve this you can bleed the brake. 

Set Up

Make sure you have a container to collect the brake fluid. You can either connect a tube to the valve (to direct the brake fluid into a container), or you can let the brake fluid run directly into a container. If you let it run directly into a container, make sure you have angled the brake so that the brake fluid does not touch any part of the brake as it drips down (this will be easier if you have remove the brake from the scooter frame).

Bleeding the Brake

Remove the small rubber cap over the bleeder valve. Pump the brake lever several times to build up pressure. Then hold down the brake lever. Whilst the brake lever is held down, loosen the bleeder valve. You should see some brake fluid flow out. If there are air bubbles in the brake fluid, then this is likely the cause of the brake issue. Now tighten the bleeder valve and then release the brake lever.

Repeat this until you no longer see air bubbles in the brake fluid coming out. You may need to top up the brake reservoir to ensure air doesn't get into the brake lines.

Last Steps

Top up the brake fluid to the marked level. Put the small rubber cap back over the bleeder valve.Test the brakes to make sure they are working correctly. Carefully dispose of the brake fluid.