Guía de purga del freno: levier esponjoso y frenada débil
Motorcycle Brake Fluid
Bleeding Guide
Air in the brake lines or degraded / water‑contaminated brake fluid causes a spongy lever, excessive free play, and delayed braking response. Bleeding the system is the essential procedure to restore proper brake feel, applicable to both front and rear circuits.
🛠️ Tools Required
🔧 Step‑by‑Step Procedure
- Top up the reservoir — open the brake fluid reservoir cap, check the fluid level, and top up with fresh brake fluid to keep the level above the minimum mark. Never let it run dry during the process.
- Attach the bleed hose — connect one end of the hose to the caliper bleed nipple and place the other end into the waste container to prevent spilled fluid from damaging paint or rubber.
- Bleed – pull, open, close, release — slowly pull the brake lever and hold it firmly. Open the bleed nipple to release old fluid with air bubbles, then tighten the nipple before releasing the lever. This prevents air from being sucked back in.
- Repeat until clear — repeat the cycle (pull → open → close → release) until the expelled fluid runs clear, bubble‑free, and not cloudy. This may take 5–10 cycles.
- Final top‑up & clean — after bleeding, top up the brake fluid to the recommended level, close the reservoir cap securely, and wipe away any spilled fluid immediately.
⚠️ Important Cautions
🧪 Brake fluid is highly corrosive — avoid contact with paint, plastics, and rubber components. If spilled, wipe immediately with a damp cloth and rinse with water.
🚫 Never mix different fluid specs — DOT3, DOT4, and DOT5.1 are not interchangeable. Always use the type specified in your owner's manual.
🧴 Use fresh fluid only — brake fluid absorbs moisture over time. Never use fluid from an opened container that has been stored for more than a few months.
A properly bled brake system gives you a firm lever, instant response, and the confidence to stop exactly when you need to. Bleed annually — or whenever the lever feels soft.