Which baffle?

Can anyone tell me the performance gain between a HRC baffle over the standard tip that has been butchered to unplug it? How do the two compare in not just performance but exhaust note? :)

Thanks Aussie 650

01 650 acerbis tank

The difference is massive. if you go to xr650r.net there are some good pictures that explain it a bit better. Basically the HRC tip allows air to bypass two large plates in the pipe that the stock tip doesn't. The noise isn't that much greater either. I did both, but didn't feel comfotable doing "half the job" so I bought the bigger tip and have been please.

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