[Odyoa Yamaha]

So just done the forum cheap exhaust /muffler mod. 32mm / 1.25" bi-metal hole saw just put down exhaust. Very pleased with new soundtrack, never saw a spitfire, hurricane or Mitsubishi zero with a exhaust!

 

[Newbie]

I went with a 38mm holesaw which removed all the circumference of the baffle

 

[Nathan]

You take one of 2 out