Auto Decomp Cam

8 replies to this topic

Posted January 21, 2007 - 04:48 PM


how hard is it to install an auto decomp cam in a 99 yz400f . do they really help?

  • YZ426F Rider

Posted January 21, 2007 - 05:05 PM


It's very easy and IMO it is the single best mod you can do to the bike. You will gain low and mid range power but best of all you can get rid of the decompression lever for easier starting. The bike will also be less prone to low speed stalling.

Do a search and you will find tons of info about this mod...on the hotcams website there is also instructions.

  • 642MX

Posted January 21, 2007 - 05:26 PM


how hard is it to install an auto decomp cam in a 99 yz400f . do they really help?

If you can change your own oil, you can swap a cam out. Yes, it makes starting 100 times easier. :lol:

  • grayracer513

Posted January 21, 2007 - 05:44 PM


From the common threads sticky, top of the index.


Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Jekel

Posted January 21, 2007 - 10:50 PM


Easy install. Just go slow and follow the instructions. It will make the bike much better.

  • Gerry B

Posted January 22, 2007 - 11:03 AM


Is it better to use the Stock 03 450 cam or the hotcams cam for the 426?

  • grayracer513

Posted January 22, 2007 - 12:09 PM


Opinions will vary, but IMO, the OEM 450 cam works at least as well, and costs less.

One point to note is that the Hot Cams AD cam for the 426 can be timed as the OEM 426 cam is timed, using the marks on the cam. If you choose that cam, DO NOT time it according to the instructions posted. Time it according to the instructions that come with it, and/or your owners manual, as if it were a stock camshaft.

  • Florida_426

Posted January 22, 2007 - 06:40 PM


I'd vote with GR, the 450DCM is the best thing to happen to my 426. Got my info here and from Satch:thumbsup: .



Posted January 23, 2007 - 09:21 AM


Thanks for all the info. I have the cams on order at the local bike shop. should have them monday or tuesday.

Related Content


Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.