What Pipes fit the 1998 WR400

3 replies to this topic
  • AATA

Posted August 24, 2011 - 03:59 PM


Can someone tell me what year pipes /models were the same. For example, will a different year YZF pipe fit on a 1998 WR400. I'm trying to find a stock muffler to make a bike quieter.


  • clodeb

Posted August 27, 2011 - 05:55 AM


I had the same problem with the bike i bought ,it came with a yosh full exhaust...way too noisy so i put back the stock steel cannister. I have read that you can put a stock yz 426 or maybe 450 can and it will fit.what is your jetting spec and is your idlle ok

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  • Birdy426

Posted August 28, 2011 - 07:09 AM


YZ and WR from 98 thru 02 will bolt right up. A stock YZ pipe with a Pro Moto Billet Sparky end cap and quiet insert will give noticeable performance improvement with a nice, reasonably quiet exhaust tome and will be off road legal where spark arrestors are required.

Several slip ons for 03-06 (steel framed) 450s have been reported to either bolt on or fit with some minor mods (spacers, slotting a hole), but your best bet is if you find one to search here on TT to see what success folks have had. To get a more complete result, search fit on YZ400/426 as well as WR400/426.

  • Hurricane

Posted September 01, 2011 - 10:43 AM


I put on a stock yzf exhaust from a 426 on my old 98 wr and could not believe the performance increase over the stock boat anchor. I would think the steel frame 450 exhausts would all fit but don't quote me on that (03 to 05).


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