Loud pipe for the GZ

[Easy Rider]

Originally Posted by rayzuki

has anyone else drilled holes? It sounds like an easy way to get a little volume but, I don't want to do anything yet without a little more feedback on this.

Yes, but 1/2 inch holes will make a BIG difference.

I put 1/4 inch holes in mine; 4 of them, inside the raised ridge near the center hole.
I think that putting them outside the ring would be more of a change.
I'd be afraid that 1/2 inch holes would affect the flow too much and result in reduced performance (without jetting changes) but maybe not.

Anyway, with 1/4 holes, you could easily tap them and put in 1/4 inch bolts to get it back to stock.