After replacing front, side,& rear m/mounts still have vibration.

automatic,manual,what model,what engine size?did you replace the transmission mount also?

OE Honda parts or aftermarket??... It's a BIG difference!!.. Try jacking engine *slightly* with a piece of wood on a floor jack saddle to see if vibe goes away... It doesn't take much so don't over do it!. IF vibe is gone after jacking and you used after-market mounts, replace with Honda OE parts!.. Especially the one in front of engine... The others 'MIGHT' be ok.. Been there on a civic, finally had to install Honda parts!.. That was my experience anyway..

PLEASE specify WHEN you experience the 'vibration' , is it at idle , cruising , or under load/accelerating?