wr 400 decompression

3 replies to this topic
  • granttaz

Posted March 18, 2008 - 02:42 PM


does anyone know if the wr 450 cam will fit the wr 400.or any way of making the 400 auto decompression 1999 model:

  • jayh300

Posted March 18, 2008 - 02:44 PM


go in to the yamaha fourm in the yz400/426/450 section in the "common threads" at the top there is a ton of info on that. Yes it can be done.

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  • jayh300

Posted March 18, 2008 - 02:47 PM


here is a link

  • hozhead

Posted March 20, 2008 - 04:19 PM


And yes it is sweet!

I did it last week and I LOVE not having to fiddle with the stinking thing. It wasn't difficult to use the decompression lever but the first time I stalled out on a hill and tried to get re-started without taking a digger convinced me that I needed to do the mod.


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