Yamaha Blaster • Free STL

Blaster Porting Template

A free printable porting template designed for improved midrange power while keeping a broad, usable powerband. It is a practical recreational port layout, not an all-out race setup.

182° exhaust • 124° transfers • Works well with OEM, FMF, and similar left-bend pipes.

How To Use It

  1. Pick the template that matches the cylinder bore size.
  2. Slip the template into the cylinder.
  3. Bolt it down using two cylinder head nuts and spacers.
  4. Trace the ports onto the cylinder.
  5. Port the cylinder to the traced lines.
It's recommend using Dykem on the cylinder, then using a scribe or pick to trace the template cleanly. Spray paint can be used in a pinch, but the clean up is more difficult. Higher performance porting templates will be available for purchase as finished prints only, not as STL downloads.

Product Photos

Blaster porting template setup and marking reference.

Blaster porting template in cylinder
Template seated in the cylinder.
Blaster cylinder covered in Dykem red
Cylinder coated with Dykem for tracing.