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Meltz

Question about removable baffle on '06 WR450F

13 posts in this topic

This thing comes out very easily. Does that eliminate the need for an aftermarket silencer such as the Q2? Does removing the baffle make the stock exhaust even close to an aftermerket in terms of increased performance?

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This thing comes out very easily. Does that eliminate the need for an aftermarket silencer such as the Q2? Does it make the stock exhaust even close?

Apparently, the 450 suffers from the same neutering that the 250 undergoes to pass inspection and get imported.

Check out www.thumperfaq.com for all the 250 info. It's more complete than what has been collected on the 450, but most is probably applicable.

You can take the baffle out of the stock silencer, but it will be LOUD. Buy a GYT-R insert for the least expensive, best of both worlds.

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Actually, I already removed the baffle from the 450 silencer. It's not even as loud as my 250 with the Q2 pipe on it. Am I using the wrong terminology? Maybe it's not the baffle. If you remove the 6 allen screws from the tip of the exhaust , there's the piece held in (along with the spark arrester) by 4 additional allen screws. I removed that piece, then reinstalled the spark arrester. The volume increased minimally.

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This thing comes out very easily. Does that eliminate the need for an aftermarket silencer such as the Q2? Does it make the stock exhaust even close?

Meltz:

You may want to reword your questions so that it's possible to understand what you want to know. Removing the baffle opens up the flow and increases the noise. An aftermarket silencer will provide better flow than the baffle and will produce less noise, so that you can meet Forest Service requirements. Is the stock exhaust even close to what?:devil:

Cairn

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Thank you. <edited ititial post> Didn't quite get everything from my brain to the keyboard, did I?

However, after removing what I think is the baffle from the '06 WR450, it's still quieter than my WR250 with the Q2.

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I have an 05 wr450. I had a really nice pipe on it (FMF Factory 4 with powerbomb header) Last week, I put the stock piple back on and replaced the insert with pmb insert. Its a lot quieter. There is a little drop off in power, but you'd have to really be trying to notice it. I forgot all about that after about 3 mins.

I would say that there is a small difference, but its not enough to justify the big bucks for an aftermarket pipe. That pmb insert is only $60. I'm not that good where another 2 or 3 hp will make a difference. Maybe later, but not now.

knowing what I know now, I would consider trying the $60 insert before the $350-$500 exhaust.

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Am I using the wrong terminology? Maybe it's not the baffle. If you remove the 6 allen screws from the tip of the exhaust , there's the piece held in (along with the spark arrester) by 4 additional allen screws. I removed that piece, then reinstalled the spark arrester. The volume increased minimally.

What you removed is the stock tail pipe insert. There are two baffles that are located inside of the main section of the muffler that you can remove by doing some surgery...they don't come out nearly as easily as the tail pipe insert. Some TT'er has diagramed the entire pipe, do a search for pipe mods and you should be able to find it.

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Removing the tailpipe as you did, is similar to putting in the PMB insert which is a larger tailpipe, the baffle you want to remove is right in front of that inside, it takes some cutting and pounding to get out but it sounds great after doing so.

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MountainMax, how much louder would you say your bike is now with the inner baffle removed? I don't mind some increase but I'd rather it not too loud. Also was there a noticable power gain, thanks

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It seems that the old 2 stroke 250's and smaller really benefitted from aftermarket pipes but my experience with putting pipes on a 2000 wr400 and a 06 wr450 did not increase performance much.......With my Q2 on my 450 I get a little more low end.

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Maybe this will help http://www.thumpertalk.com/forum/showthread.php?t=349760&highlight=Modified+Stock+Muffler This exact mod and a few variations of it have been done on my friends bikes and the bike will be very loud with the entire guts removed and only slightly louder but more responsive with the tailpipe mod and a 40 mm hole in the rear baffle ( cut with a hole saw on a long arbour ) This mod is for us cheap Ba$#rds and not for those willing to argue endlessly about the virtues of all the aftermarket pipes out there. WR Dave

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