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YZ450F4

Cdi

7 posts in this topic

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

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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.

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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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