Yamaha Motorcycle Blind Plug

This STL file represents a 3D-printable replacement for the Yamaha blind plug (part number 164-18589-00-00), commonly used on vintage models such as the 1975 Yamaha DT125. The plug is designed to cover and seal an unused port on the engine crankcase or cylinder area, maintaining proper pressure and preventing dirt, debris, or moisture ingress.

The part is modeled to match the OEM dimensions and snap-fit or press-fit securely into the designated port using a standard phillips screw driver. It features a shallow cylindrical body with a slightly domed or flat head, depending on the original design, and may include a small lip or ridge for secure seating.

Key Details:

• Fitment: 1975 Yamaha DT125 (may fit other models using the same part number)
• Function: Seals off an unused engine port (blind plug)
• Material recommendation for print: PETG or high-temp resistant ABS for durability and heat resistance

Ensure proper print orientation and fitment testing before final installation. This replacement is best suited for restoration or temporary use and should be inspected periodically.