ok,...ive been looking at aftermarket cdi boxes,but ive been told that i should replace the valve springs first with stiffer ones...

what do you guys think?
my bike is an 04 baja x with stock cdi,..e-series slip on...k&n,..jet kit,..15t front,..20" tires...ect...

is it worth the trouble for the few extra rpm's?...or will the stock ones hold up to more rev???

 

The stock spring on the DS are better than most aftermarket springs for other quads. Aslong as you keep stock valves in your head, the stock springs will work fine.




bigger.

 

I've heard 1-year with aftermarket cams but, that sounds a bit conservative.

What are the big boys doing?

 

i went with new springs, but i'm also almost at the 1 year mark. they seem to be working fine at this point.

 

that was for the new engine mods. with just a cdi stock should be fine.

 

With stock cams - keep the stock springs. If you go with aftermarket cams and springs, change the springs at least once a season - especially if you use dual rate springs that are not shim under bucket. You could wait until the springs shatter with shim under bucket, the only thing that will happen is that you'll need a tow home. If you wait until the normal dual springs shatter (without shim under bucket) you'll have a large repair bill.

 

whats a safe rpm limit to be at with stock springs??...what are my " safe " options for cdi's?....i was told if i rev to high, that the valves will "eyebrow" the pistons...