can I use an S4 front counter weight from an N/A with S4 Tll rotors, Im thinking about balance, I have the flywheel counter weight already. Ron

 

yep s4 rotors weigh'd the same na or turbo. http://www.mazdatrix.com/faq/rotorwgt.htm

 

he's talking about using the front counterweight, not rotors.

As long as the whole rotating assembly is balanced, I don't see why not. front counterweight, e-shaft, rotors, and rear counterweight balancing, should be just fine.

 

front counterweight and rear counterweight w/ aftermarket flywheel (or a s4 t2 stock flywheel but that weighs 28lbs)
id balance the whole assembly while you're at it. motor will be happier for it
The factory balances have some huge tolerances. its not quality work for balancing, just "good enough"
The e-shaft and irons shouldnt affect the balance, maybe the clearances, but just the two s4 counterweights for the s4 rotors