1. The brake fluid reservoir is made of translucent resin. If the reservoir is dirty, simply wipe it with a cloth for an easy visual check.

2. The brake fluid level is closely related to brake pad wear. A slow decrease is normal; if it drops sharply, top it up first and then observe.

3. Check the remaining brake fluid through the display window of the brake box, and also watch for scratches on the brake line.

4. Spray brake cleaner onto the brake box and disc rollers to remove dust and oil, improving brake sensitivity.

5. For the clutch, first check the fluid level in the engine compartment reservoir. If it is low, the clutch will not disengage.

6. The fluid used by the clutch brake is the same as brake fluid; one spare reservoir is enough.