New Muffler Worth It? (XR400)

Joined
Dec 8, 2000
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#1
I've been thinking about buying a Power Core IV muffler, removing the snorkel and rejetting. Does this improve the power much on the XR400. Is it worth the money? I have a 2001 model. Also, if I decide to buy, are there any special tools I need to take out the pilot and main jets??? Thanks!

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penguin

N. Texas SP
Joined
Feb 19, 2000
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#2
It wakes up the power quite a bit, and saves a couple of pounds. No special tools to remove the jets, just a 6mm socket and a screwdriver. you will find the bike will hit the rev limiter faster with the new pipe, requiring a quick foot on the shift lever.

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You weren't born knowing this stuff.
 

mtngoat

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Jun 12, 2000
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#3
Just did it to my buddy's new XR4 (with a ~$250 White Bros E pipe); what a difference! As for the pipe, we compared performance between another new XR4, with the same mods and a ~$75 vortip. We all felt the performance gain was noticeable enough to be desireable. Whether it's worth the ~$175 cost differential is your call. BTW, both exhaust changes were reasonably quiet; important to our group.
No special tools needed for the jets. A manual is a good idea though.

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Noscitur ex socio, qui non cognoscitur ex moto artem

[This message has been edited by mtngoat (edited 04-13-2001).]

[This message has been edited by mtngoat (edited 04-13-2001).]
 
Joined
Apr 11, 2001
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#4
I've got a 96 XR400 with the PowerCore IV-2 muffler and did notice a difference. Before I had the OEM with the Vor-tip. The power is noticeable with the new muffler. The above post was correct in descibing it. It also gives it a deeper "thump", not as tinny. I also have a K&N filter, snorkel removed. My local shop guy put in 68/168 jets for the altitude and something about the moisture in the air. Me likey a lot, good luck.....

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96 XR400, nicely modified
 
Joined
May 21, 2000
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#5
I just recently added the FMF PowerCore IV2 to my bike and was very happy with the results. It really "wakes" the bike up throughout the entire power range and is a lot more fun to ride. I would consider getting the new quiet version of the PowerCore if I were do it again, as it does make the bike louder. However, it is a much lower and deeper tone then stock and sounds pretty cool, just kinda loud.
;)

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Ride it like ya stole it!
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'00 XR400