Exhaust Flow Question

4 replies to this topic
  • deelong4002

Posted March 17, 2007 - 04:29 PM


I have a 2000 XR600 and i have heard of people grinding down those humungous welds on the inside of the exhuast header where the flange is. Is this a good idea, and will it actually do anything performance wise, or should i just leave it alone?

  • hrc1

Posted March 19, 2007 - 06:14 AM


I have the same bike, and i did it when i changed the muffler. I can't say i noticed a diff since i rejetted, went to a supertrapp, and switched filters... so that wasn't the only mod done. The welds were overly large so i ground them down and rounded them off quite a bit. I chose not to make them flush and chance weakening the weld. Flow is flow so i'm guessing there is some gain to be had.

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  • creeky

Posted March 19, 2007 - 07:09 AM


Some will swear that they can tell the difference, I cannot.

  • TheCure

Posted March 19, 2007 - 12:11 PM


Some will swear that they can tell the difference, I cannot.

I couldn't tell, but I had a lot fun grinding them off thinking about all the power I was going to imagine I was gaining.

  • deelong4002

Posted March 19, 2007 - 03:14 PM


HA HA HA Thecure, i could see me doing the exact same thing, and then riding and being like "oh man this is so much better" and there being absolutely no change whatsoever

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