I've read about guys using the Z400 spindles and brakes on the 500's but couldn't find anything on the 250's.  Do they not fit?  If not what is the problem......ball joint taper, ball joint length, spindle height, clearance issues?  Just curious on why nobody is doing it on the 250's.

I believe Carl -AKA Iceracer- does.  Wasn't it was simple as adding some shims?  Can't remember.

If the Z calipers work then that means YFZ calipers should work because they do on that conversion on the Z's. 

Hey carl is there any dual piston set up that just bolts up? Thanks

yfz calipers on z400 spindles.

That's the set up I converted to, along with a z400 master cylinder.

I'll just stick with the yfz hubs I have.  I was just thinking about the z400 cause I have z400 hubs on the rear and I could have kept a Suzuki bolt pattern on both ends.

I can use any yr z400 spindles with any yr Yfz hubs and caliburs I just have  to shim the caliburs ?

You use the yfz hubs on the factory 250 spindles.  There is a write up on it in the 250 chassis section.

Thanks