6 replies to this topic
  • YZ450F4

Posted January 04, 2011 - 11:09 AM


what is a good performing aftermarket CDI unit for a 2004 yz450f and is it worth the money?

  • grayracer513

Posted January 04, 2011 - 12:00 PM


What would you be wanting to accomplish with a different CDI?

  • brentn

Posted January 04, 2011 - 12:50 PM


Don't they offer more advanced timing than stock?

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  • grayracer513

Posted January 04, 2011 - 01:44 PM


Don't they offer more advanced timing than stock?

Yes and no. They offer different advance curves (timing maps) for differing situations. More advance is not always productive or safe. I asked what he wants from it because there are some things they will not do, and other things that can be done cheaper with used OEM parts from other years.

  • YZ450F4

Posted January 05, 2011 - 10:13 AM


i would just like a little more topend than what it has

  • YZ450F4

Posted January 05, 2011 - 10:14 AM


i herad 03 cdis are different?

  • grayracer513

Posted January 05, 2011 - 11:09 AM


The '03 is different. It actually flattens out on top a bit more than the '04. An '06 may work better for you, but you may find that the cams are the limiting factor in this, and a set of cams from an '06 may be more what you need.

Some of the aftermarket ignitions like the Vortex can give you "some" more top end.

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