yz400f vs 426 stock exhaust dimensions?

3 replies to this topic
  • Shane_Bettin

Posted June 29, 2004 - 07:35 PM


im wondering because ive gotten my second slip on from an unknown company and again its doens't bolt up and fit perfect. the first time i had recieved a 450 pipe in stead of a 400 and the mounting brackets were off. ive now recieved my 2nd pipe and a tag on it said 426. the brackets will work but when i tighten the lower one above my brake it ends up tweaking the header out a little, and where the header connects to the pipe, its not a tight fit. the pipe only goes over the heard about and inch rather then 2 inches, this allows the exhaust to leak out from there. ive now waited about 3 weeks to a month for this pipe and if i get a 3rd one sent out for my 400 will be different then the 426 and bolt up. im almost ready to ask for a refund because of this bs. its just ive heard alot of good stuff about this pipe on here and i want one.

  • DPW

Posted June 30, 2004 - 02:39 AM


I had a '99 YZ400F(Great bike) and I put on a complete stock exhaust system from a '01 YZ426F without a problem fit like a glove.

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  • RJB

Posted June 30, 2004 - 03:55 AM


Are you sure your subframe is straight? I picked up a second hand (stock) YZ400 pipe for my 02 426 and it fitted without a problem, so I would guess that they are the same fitting, unless the guys I bought it from got the origin wrong

  • Shane_Bettin

Posted June 30, 2004 - 11:08 AM


ya its pretty straight. is there some kind of heat wrap available so that i can wrap it up and seal it. it doesn't lots, im just worried about water getting in when i wash it. i don't think it would lean it out that much either.

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