As said before, it sounds like you may have the wrong counterweight, unless something was messed up in the meantime, while doing the work

Just to make sure...a few more questions. Does it vibrate when the car is stationary also? So it's engine speed, not vehicle speed dependent? Clutch engaged, disengaged, or both? In gear or not? Sometimes, a problem comes up and happens to be bad coincidence.

 

Officially..

vibration is felt at all times. clutch in, out, driving, stationary.. So def engine speed north of the pressure plate. It made vibes since test drive #1..

heres some pics from the OG sale.... engine side only in both pics. : (
Sad day for grae. This counterweight is from a FB.

http://mazdatrix.com/faq/Rcounterweights.htm

MINE:.........notice the stamping in both pics...


Pics from mazda trix..
"Early ones have "29", "1029" or "1029A" stamped on them. Not all are stamped"
... All other weights have feature slight differences but "No real distinguishing features"