Hi all ...just recently acquired a Japan Spec Honda S2000 - 2001 Model been driving it now for about a couple weeks and after i come off throttle in 3rd gear after hard acceleration i can feel a really bad vibration .... i have changed all engine mounts back to factory spec..and the problem still is occuring.. can anyone tell me quite possibly what this is? thanks.. im a new member to this forum so any help will be greatly appreciated.