06 yz450f exhaust

4 replies to this topic
  • OLINyz450f

Posted March 30, 2008 - 01:32 PM


I just bought an White Bros.E2 slip on exhaust on Ebay for my 06 and the seller stated it was for a 06-07 yz450f. Well everything bolted up fine except for where it slips on to the stock head pipe. The WB muffler pipe was a larger diameter than the stock 06 head pipe and the stock clamp is too large, the instructions that came with thr pipe stated it was for an 07. what can I do to make this work? will an 07 head pipe work on a 06 head? thanks for any help with this.

  • KJ790

Posted March 30, 2008 - 07:07 PM


The 07 had a larger headpipe than the 06. The only thing I can suggest is that I know FMF pipes come with a spacer that slips in the larger diameter midpipe and makes the diameter smaller for the 06 header, this way they can use the same slip on for 06-08 even though the headers are different diameters. You could make one yourself if you are good with a lathe, or you could call FMF and see if you can get one from them.

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  • OLINyz450f

Posted March 30, 2008 - 08:08 PM


Thanks for the help,I found a 07 stock pipe but was not sure it would fit my 06

  • jsgriffey1

Posted March 31, 2008 - 08:15 AM


If you use the 07 Head pipe it will probably lean your bke out and you will be looking at a rejet situation. I had the same problem with my bike when I purchased a FMF 4.1 slip on for my 06. I work in manufacturing so I measured the head pipe OD and the mid pipe ID and had our machne shop make a spacer. If you have the dimension any shop could turn one out in no time and very cheap. Another route is contact FMF for the spacer, I think it runs about $25.00 and FMF does sale this spacer sepratly.

  • KJ790

Posted March 31, 2008 - 10:19 AM


I can check and see if I have an extra FMF spacer laying around for that size. Every FMF pipe for an 06-08 YZF comes with a spacer, so I may have an extra.

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