WR 4XX owners. Want auto decomp?

12 replies to this topic
  • yamaha.dude

Posted November 18, 2002 - 08:00 PM


Then go look at this post:




  • GPS Dual Sport

Posted November 19, 2002 - 06:42 AM


Very cool

  • x2smoker

Posted November 20, 2002 - 12:24 PM


Thought I would reply to keep this post up front for more to see.

Question: Will the YZ450 cam make a WR have YZ timing by lining up the dots as in the manual? That would also be waaaayyy cool! Another mod to add to the winter to-do list! I'm hoping this is a go, waiting for more reports!

  • bman

Posted November 20, 2002 - 05:10 PM


Wonder when the wr 450 cam will be in. For some of us not wanting yz cam or timing. Interesting reading. Never would I have guessed that a 450 cam would fit in a 400/426.

  • Chaindrive

Posted November 20, 2002 - 08:35 PM


Unless I missed it somewhere, I don't think it has been proven to work in a 400 yet. Sure hope it will; it's not e-start but it's certainly a step in the right direction: Get on and kick! I did miss that feature from the old Hondas...

  • sabin

Posted November 20, 2002 - 09:40 PM


I guess now some clever TT fellow will discover how to put magic button on 400 and 426 :)

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  • yamaha.dude

Posted November 20, 2002 - 10:09 PM


I've ordered my cam, there were two available in Australia, and I have one of them...

I will be hoping to get it in at some point in the next week or two... cam should be in on Monday... I think, like the 426's, that the cam lobes are the same profile, it is just where the wheel (and subsequently the alignment dots) are pressed on... you could WR time a YZ cam, just move it two teeth back... as opposed to moving a WR cam 1 tooth forward for YZ timing...

Let me get it in, and shimmed to spec, then I can try it both ways... I will report back, may not be for a couple of weeks, but I have some time up my sleeve in the next week or so...


  • MN_Kevin

Posted November 21, 2002 - 08:44 AM


This sounds PHENOMINAL!!

I am anxious to hear the results!!! :)

  • hsstar

Posted November 21, 2002 - 09:32 AM


Will this mod work on my 98 WR? if not why do you think? I just spent $100 on a new kick start lever,$150 for a cam would not be a problem.

  • Jeff_Magnusson

Posted November 21, 2002 - 01:35 PM


I wonder if the 250f cam with auto decompression will fit. The head on the 250f did not change as much as the 450f did.

  • yamaha.dude

Posted November 21, 2002 - 01:57 PM


I wondered that myself, but it does not fit as far as I know... they may seem to be very similar, but they are different dimensions in some important areas, base circle, lobe centres and overall length - this is not gospel, but I recall it from someone or somewhere reliable...

Sorry... :)


  • sabin

Posted November 21, 2002 - 09:12 PM


What is the part number of this YZ450 cam? Do you guys think that WR owners better wait for the WR cam to come out?

  • yamaha.dude

Posted November 22, 2002 - 03:13 AM


My cam is at the dealers, will pick it up tomorrow morning...

The part number is on the PDF fact sheet, which is listed in the other forum, or else I will list again here...

PDF File for 450 Cam info...

Download it and get the details... you should be able to right click the link above and choose "Save as..."




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