i am considering buying a stubby "moto gp" exhaust off of ebay. it says it has a small baffle and tuning is "recommended but not necessary. anyone have any thoughts on this?

 

What bike and which exhaust ?
We try to be mind readers but some days we're not that good.....

Oh and just for information - pipes fitted to GP bikes are good at the top of the rev range where they ride most of the time.
Useless on a street bike.

You may wish to consider an ARROW pipe as used on some of the SBK bikes........
they make street pipes.

Buying some arbitrary so called "GP style pipe" can only cause you grief and probably LOSE performance.

 

sorry its a cbr f4i 2002

 

I'm working on a scratch build stubby right now, glad you mentioned tuning, I pretty much guessed on some sizes and hope there is not too little or too much back pressure. I wanted to buy a new one but took up the challenge of building one. Muffler will be in the 12.5" to 13.5" range in length. The total cost so far will be like $27 and thats just for the aluminum sleeve. plus paint, it will only be high heat clear coat, the sleeve is going flat black, end caps are stainless steel. If you have access to a lathe and a simple mill take the challenge. I am going to attempt a how to once I have the second half of the plan set in stone. Good luck on your muffler search.