400EX rev box on 350x which on works

[jays375]

What 400ex cdi box wil work on the 350x.One that actually raises the rpm level.There is it of myths on this one.Which really is a improvement?

[WIkid500]

If the 400EX CDI box works on the 350X then the stock XR250R CDI box will be the one you want. RPM is raised about 800RPM over the 400ex cdi box. 1992-2004 Part #30410-KCE-671

[Hurricane635]

Stock 350x cdi does not have a rev limiter built in. The aftermarket rev boxes for the 400ex have a more aggressive timing curve making them run better plus providing a little over rev protection. You need to use the 86 pick-up to use the 400ex cdi. I use the AMR rev box on my 350x.