I altered mine with a long 3/8' steel rod, used as a punch. The additon of two extra internal holes helped a little.. .. four holes that ruptured between the internal baffle tubes was better,.. with improved fuel economy.
But when a serious assault was made on the outlet tube,.. I lost power and torque to a very noticable degree. ( It was gutless )
After having the original internals replaced with a straight through glass pack muffler I once again had power and an excellent sound. :wink: Just a bit lean.
I did need to have a Dyno-Jet kit installed, and now its at 105hp.

 

I performed the bafflectomy per Greg's recomendations and I found it fairly easy to do. Infact, I believe I had it done in around 15 minutes. I think a jet kit would definitely help it now, but mine seems to be running great and the sound is much improved over stock. Do not do this modification unless you want to be noticed, it is much much louder than stock.

 

Back in "the day" we did these bafflectomy on bikes by just pouring a bit of carosene into the pipe and "boom" lighting that sucka and burning out a bit of the baffle. Now days stuff is made so cheap it would probably blow the pipe appart. Good article though and good pics to support your idea.

Has this caused any mid range loss on anybody?

 

it softens up the midrange a little bit, barely noticable. It does not need a jet kit for this mod alone, but if you put a filter on also it would definitley benefit from the kit.

 

O.K. thanks for the reply on that. I did that to my hurricain year ago. I did the "pipe punch" and when with a high flow airbox. It made for a nice sound, just a hair louder then stock, and it gave me just a hair more get up and go.