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Old 10-02-2008, 01:19 PM   #1
Psyclone
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drilled baffles

I have a 1000RR, I drilled the baffles at the recomendation of a fellow rider. Someone latter comented that this mod would lower engine back pressure to much and may cause damage. Any expert 2nd opinions?
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Old 10-02-2008, 03:06 PM   #2
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You ruined them.
Get slip-on, you won't HAVE to get a Power Commander too, but I would.

Or get a PC to run those hard to tune drilled out stockers that sound bad.
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Old 10-02-2008, 04:42 PM   #3
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Factory? or A/m?

The reason I ask, the factory muffler has baffling much like that of a car, its not straight through. A/M baffling usually is a perforated tube within the muffler, packed w insulation around it and compresses the pulses by a taper or a bend at the end of the muffler.

Pulling baffles on an a/m muffler will only change the tone maybe mess w the finish of the outside pipe.

Factory intermediate pipes sometimes have baffling too. A little of backpressure will be lost.
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Old 10-02-2008, 05:58 PM   #4
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They where only stock, I couldn't stand the muffled sound of the stock pipes and I don't have enough money to a full Yosh set yet. Do you know if it will cause any engine damage?

Thanks for the second opinion.
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Old 10-02-2008, 06:11 PM   #5
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meh drilling out the baffles sounds terrible in my opinion. i'd grab a slip on. save yourself the money.
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Old 11-13-2008, 03:09 PM   #6
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Why would less backpressure damage anything? Most aftermarket systems have little backpressure. Isnt there a kit to replace the baffles inside your stock muffler? Maybe the one I saw was for an R1?
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Old 11-13-2008, 03:35 PM   #7
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if you ran the bike open headed (no exhaust at all) you could theoretically burn an exhaust valve. Removing the baffles from the muffler isn't going to do .
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Old 11-13-2008, 04:45 PM   #8
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You still have no less backpressure than a straight through am pipe. It wont make a difference.
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Old 11-13-2008, 04:46 PM   #9
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, look at all of the cut down stock pipes. Its the same thing.
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