Cam info

9 replies to this topic
  • Christine

Posted November 15, 2009 - 02:10 PM


Anyone have some good info on a hot cam for a 426. I was told putting hot cams in really make the bike ez to start.


  • rufusz

Posted November 16, 2009 - 01:56 AM


IMO autodecomp is the best mod for a 426! Go for it. :excuseme:

  • jrny426

Posted November 16, 2009 - 07:00 AM


either that or a 03 450 exhaust works well too

  • wr426Ripper

Posted November 16, 2009 - 07:04 AM


WR, prorerly jetted should not be hard to start to begin with. my 2001 426 will start on the first or second kick quaranteed!!!!!!!!!!!!! And I am at 6000ft in elevation. check your jetting again!!!!!!!!!!!!!!

  • grayracer513

Posted November 16, 2009 - 08:26 AM


either that or a 03 450 exhaust works well too

The OEM 450 cams used to be the way to go for a couple of reasons, but their prices have risen to match the price of Hot Cams, and the HotCams unit has improved on several points. Aftermarket cams made for the 426 fit the chain better, and are easier to time. At this point I no longer see an advantage to the OEM cam over Hot Cams, and I usually recommend using the HC now.

Either cam simplifies the starting drill by eliminating the need to pre-position the crank prior to each kick. You simply push it up against compression and then kick it. The AD system locates the crank in the perfect spot each time. IF, however, your idle circuit is not correctly jetted and trimmed, it will still not start as well as it should.

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  • Christine

Posted November 18, 2009 - 10:41 AM


IMO autodecomp is the best mod for a 426! Go for it. :excuseme:

Can you give me some details on this please?

  • Christine

Posted November 18, 2009 - 10:41 AM


Does the stock cams not have a decompression device?

  • grayracer513

Posted November 18, 2009 - 11:19 AM


Stock 426 and 400 YZF/WRF engines, as well as YZ250f's in '01 and '02 were manual decompression only. Auto decompression came in with the 450 in '03.

  • l_campionero

Posted November 18, 2009 - 11:27 AM


My '00 426 was a first- or second-kick starter with the stock cam.

  • grayracer513

Posted November 18, 2009 - 01:56 PM


My '00 426 was a first- or second-kick starter with the stock cam.

Maybe, and many are when properly set up and properly operated, but no serious attempt can be made to argue that that same 426 would not have been even easier, simpler, and quicker to start with auto decompression.

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