Help getting my FMF slipped on...

2 replies to this topic
  • bkridin

Posted September 15, 2011 - 10:42 AM


OK, whats the trick? Tried putting my new FMF Power Core IV on my '06 WR450 and it won't slide onto the stock header pipe. Can get it about an 1/8" on but it needs to travel about another 1 1/4" inches to be all of the way on.

Applied heat to the slip on, that didn't help, banged on it with a rubber mallet that didn't work, whats next?

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  • dustdogg

Posted September 15, 2011 - 07:18 PM


Are you sure you have the right pipe? Could it be for the YZ? I know that the YZ's have a larger headpipe than the WR's, but I'm not sure when they changed. You need to double check your part #'s because something doesn't sound right. There shouldn't be that much force needed for a pipe that is considered a "slip on".

  • bkridin

Posted September 16, 2011 - 05:13 AM


Yep, something is not right. It caused me to abort the Reno 200 on the WR so I will be riding my KLR instead. The O.D. of the head pipe is very near the ID of the slip on. I was not aware the YZ had a larger head pipe which mine could be, I am not the original owner.

Won't get to it till next week now.



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