Yamaha B4F-E1166-00-00 - Breather Pipe 1 is a genuine Yamaha part. It is a hose or pipe that routes fluid, air, or vapor between components. Use part number B4F-E1166-00-00 to confirm it matches the component shown in your model's Yamaha parts diagram.

---

Key Features & Benefits

• Sized for the factory routing in its location.
• Routes fluid, air, or vapor between components.
• Replaces a cracked, hardened, kinked, or leaking line.
• The 1 in the name separates this part from others that share the same name, so order by part number B4F-E1166-00-00.

---

Frequently Asked Questions

What part does Yamaha number B4F-E1166-00-00 refer to?

Yamaha number B4F-E1166-00-00 identifies the Breather Pipe 1, a genuine Yamaha part. This line carries fluid or air between the components it connects.

Why is there a 1 in the name Breather Pipe 1 (B4F-E1166-00-00)?

Yamaha adds numbers to parts that share a name so each one can be told apart. The 1 does not indicate quantity, so order by the full part number B4F-E1166-00-00 rather than by name.

When should I replace the Breather Pipe 1 (B4F-E1166-00-00)?

Replace the Breather Pipe 1 if it is cracked, hardened, swollen, kinked, or leaking. Follow the original routing when installing B4F-E1166-00-00.

---

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.